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A Field Demonstration of the Effect on Streamflow of Clearing Invasive Pine and Wattle Trees from a Riparian Zone
Item type: Journal Article • Journal: South African Forestry Journal • Authors: P.J. Dye --- Division of Forest Science and Technology, A.G. Poulter --- Division of Forest Science and Technology,Two portable weirs were used to quantify changes in streamflow following clearfelling of a dense stand of self-sown Pinus patula and Acacia mearnsii along a riparian zone on Kalmoesfontein, a SAPPI forest plantation south-east of Lydenburg, Eastern Transvaal. The weirs... -
The effect of tebuthiuron on the vegetation of the thorn Bushveld of the Northern Cape – a preliminary report
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Moore --- Department of Agriculture (Free State Region), J.P. Van Niekerk --- Department of Agriculture (Free State Region), I.W. Knight --- Department of Agriculture (Free State Region), H. Wessels --- ,Two formulations of tebuthiuron i.e. Graslan 20P and Graslan 40P are currently being evaluated in the Molopo area. Tebuthiuron was applied aerially at ten application rates, in combination with two application dates. -
Browse and herbage production in the eastern cape thornveld in response to tree size and defoliation frequency
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.C. Stuart‐Hill --- , N.M. Tainton --- Department of Grassland Science,Grass yields in this semi‐arid savanna declined as the size of Acacia karroo increased. Browse yields, however, did not increase as trees grew out beyond 1,8 m in height and it follows that if bush thinning is required, then the... -
An effective technique for breaking the seed dormancy of Acacia longifolia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- P.P.R.I, Weeds Research Unit, Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaThe effect of different pre-treatments on the dormancy of the hard-coated seeds of Acacia longifolia Andr. Willd. was determined. A final germination figure of 100% could be obtained with hot water treatments, acid scarification and manual scarification. However, if germination... -
Investigations on the removal by animals of Acacia longifolia (Fabaceae) seed from the soil surface at Banhoek in the southwestern Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- , Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaStudies on the removal of Acacia longifolia (Andr.) Willd. seed from trays on the soil surface showed that 91,07% of the seed was removed after one week of exposure. Exclusion treatments indicated that ants removed 57,22% of the seed while... -
Imbibition and germination of seeds of three Acacia species from Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. Sánchez-Bayo --- Department of Wool and Animal Science, Australia G.W. King --- Department of Wool and Animal Science, AustraliaImbibition and germination of seeds of three Acacia species from Ethiopia, namely Acacia nubica, A. seyal and A. horrida, were tested in laboratory conditions. Heat treatments had a positive effect on imbibition rates for all three species. The best treatment... -
Season of application and glyphosate formulation as factors influencing the efficacy of glyphosate on phyllode-bearing Australian acacias
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- Department of Agronomy and Pastures, Republic of South Africa J.B. McDermott --- , Republic of South AfricaInvasive phyllode-bearing Australian acacias are more difficult to control chemically than true-leaved acacias. Indications were that season of application influenced the efficacy of herbicides when used against these plants. In this experiment two formulations of glyphosate (with low and high... -
Ecological factors affecting the early development of seedlings of three Acacia species from Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. Sánchez-Bayo --- Department of Wool and Animal Science, Australia G.W. King --- Department of Wool and Animal Science, AustraliaThree Acacia species from Ethiopia, namely Acacia nubica, A. seyal and A. horrida, were tested for growth and resistance to drought during the establishment phase in glasshouse and laboratory conditions. The experiments showed that each species has different preferences for... -
Development of integrated control strategies for wattle. 1. Utilization of wattle, control of stumps and rehabilitation with pastures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- Cedara Weeds Laboratory, Republic of South Africa R.L. Kluge --- Cedara Weeds Laboratory, Republic of South AfricaTwo integrated control strategies were developed for areas where wattle infestations could be utilized. Costing analyses were determined for initial control and four follow-up control operations using chemical control and fire. Efficacy of all treatments was high. Costs were significantly... -
Development of integrated control strategies for wattle. II. Control of unwanted wattle
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- Cedara Weeds Laboratory, Republic of South Africa D.C. Naudé --- Cedara Weeds Laboratory, Republic of South Africa R.L. Kluge --- Cedara Weeds Laboratory, Republic of South AfricaFour integrated control strategies were developed for wattle that could not be removed for utilization. In the first two strategies, a combination of mechanical and/or chemical control methods either reduced the wood biomass in situ (fell, stack and burn) or... -
Breaking dormancy to improve germination in seeds of Acacia erioloba
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.K. Materechera --- Faculty of Agriculture, Science & Technology, Republic of South Africa S.A. Materechera --- Faculty of Agriculture, Science & Technology, Republic of South AfricaAlthough Acacia erioloba is an ecologically important indigenous leguminous tree in semi-arid areas of Southern Africa, its propagation remains difficult because of seed dormancy. Different techniques of scarifying the seeds to break dormancy were tested and compared viz.: non-scarified (control),... -
Control of black wattle (Acacia mearnsii De Wild.) seedlings with Garlon herbicide applied by backpack mistblower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.D. Viljoen --- , South Africa C.W. Stoltsz --- , South AfricaBlack wattle (Acacia mearnsii De Wild) has great economic value for South Africa, but also poses a tremendous threat to our natural ecosystems once it “escapes” from plantations into the surrounding grassland and watercourses, often forming dense, impenetrable thickets that... -
Effect of Acacia tortilis pods on intake, digestibility and nutritive quality of goat diets in southwestern Eritrea
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MengistuR Araya RobinsonK Ngugi NashonK R Musimba DicksonM NyarikiFresh Acacia tortilis pods were mixed with low quality native grass hay to form the following five rations: 100% hay (T1), 25% pods and 75% hay (T2), 50% pods and 50% hay (T3), 75% pods and 25% hay (T4) and... -
Research note: Tests for inducible thorn defences against herbivory must consider plant growth strategies
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.J. Midgley --- Botany Department, Republic of South Africa D. Ward --- Mitrami Centre for Desert Ecology, Jacob Blaustein Institute for Desert Research, IsraelThorn length and density on the latest year's growth were compared at three height (feeding) levels (<1m, >1m<2 m and >2 m) on individuals of Acacia karroo and Ziziphus mucronata in an area that was browsed by goats. Thorn length... -
Of goats and spines – a feeding experiment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Skarpe --- Department of Forestry and Wildlife Management, Norway R Bergström --- Department of Wildlife, Fish and Environmental Studies, Sweden K Danell --- Department of Wildlife, Fish and Environmental Studies, Sweden H Eriksson --- , Italy C Kunz --- , SwedenSpines in plants have evolved to reduce mammalian herbivory, and their main function may be to protect twigs more than photosynthetic tissue. Type and frequency of spines vary at different scales. We hypothesised that different types of spines affect animal... -
Bush clump succession in grassland in the Kei Road region of the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor --- , South Africa SC Chamane --- , South AfricaBush encroachment is a vegetation dynamic of global interest. This study describes the pattern of succession of bush clumps in the Eastern Cape, South Africa, using a space-for-time substitution. Clumps formed following establishment of mainly Acacia karroo in grassland through... -
Vegetation change over 40 years in the Weenen/Muden area, KwaZulu-Natal: evidence from photo-panoramas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.T. Hottman T.G. O'ConnorThe utility of panoramic photographs for studying the extent and pattern of vegetation change, in particular of bush encroachment, was investigated by revisiting thirteen sites in the Weenen and Muden areas of KwaZulu-Natal that had been photographed in 1955. The... -
Seasonal and spatial distribution of roots and arbuscular mycorrhizal fungi under live fences of Acacia laeta and Acacia mellifera in Sénégal
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: O. Diagne A.S. Seck Y.K. Gassama-DiaSoils were sampled around live fences of A. laeta and A. mellifera plots in an experimental research site of the Senegalese Institute of Agricultural Research at Bambey, Sénégal. They were collected before and after the rainy season at three distances... -
Nutrient cycling by Acacia erioloba (syn. Acacia giraffae) in smallholder agroforestry practices of a semi-arid environment in the North West Province, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R.N. Murovhi S.A. MaterecheraAcacia erioloba is an ecologically important indigenous leguminous tree in semi-arid areas of Southern Africa because of the many benefits it offers to local communities. However, little quantitative plant and soil data exist to explain its ability to enhance soil... -
Kraft Pulping Properties of Acacia mearnsii and Eucalyptus grandis Grown in Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A. Muneri --- , AustraliaPulpwood samples from 8-year old Acacia mearnsii and Eucalyptus grandis plantations grown in Zimbabwe were evaluated for kraft pulping, bleaching and papermaking properties. The possibility of co-pulping the two species was also investigated. -
8. A Different Approach to Site Evaluation and Some Preliminary Results
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , R.C. Purnell --- de Wet Forestry Research Centre,This paper describes a new approach towards site evaluation of exotic tree species which have a limited and non-representative occurrence. Instead of applying the classical site factor analysis and measuring a considerable number of sample plots of different ages at... -
Management options For Australian Blackwood (Acacia melanoxylon) in Southern Cape Forests, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A.H.W. Seydack --- Department of Water Affairs and Forestry,Australian Blackwood (Acacia melanoxylon) was actively introduced into the indigenous forests of the southern Cape until about 1930. On the perception that this exotic species constituted a threat to the indigenous forest, a policy of eradication was followed. This perception... -
The economic value of Acacia karroo in small-scale farming systems and game farming in northern KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: T.S. Mkhabela --- Isithebe Agricultural and Rural Research Consultancy,The purpose of the investigation was to examine current knowledge, by local people, of the agroforestry roles and the economic importance that the Acacia karroo tree plays in the farming systems or small-scale farmers and game farming in the Dundee... -
A breeding strategy for Acacia mearnsii (black wattle) in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. W. Dunlop --- , R. D. Bairnes --- , UK K. M. Nixon --- , S. F. Hagedorn --- ,The black wattle breeding programme that has served the wattle bark industry ofSouth Africa for the past five decades putlittleemphasis on improvingthe yield and quality ofthe timber, as timberwas not the product ofimportance. Today the timber is as important, ifnot... -
Estimating the leaf area index (LAI) of black wattle from Landsat ETM+ satellite imagery
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.T. Ghebremicael --- School of Applied Environmental Sciences, Faculty of Science and Agriculture, South Africa C.W. Smith --- , South Africa F.B. Ahmed --- School of Applied Environmental Sciences, Faculty of Science and Agriculture, South AfricaRemote sensing techniques have the potential to provide resource managers with a rapid and economical method of acquiring information related to forest productivity and water use. This study evaluated the utility ofLandsat ETM +satellite imagery to predict canopy attributes ofBlack... -
Equations for predicting the biomass of Acacia cyclops and Acacia saligna in the western and eastern Cape regions of South Africa Part 1 : Tree-level models
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A. van Laar --- Faculty of Agricultural and Forestry Sciences, J.M. Theron --- Faculty of Agricultural and Forestry Sciences,A forest inventory was carried out in coastal areas infested by the alien tree species Acacia cyclops and A. saligna on the West Coast, Agulhas and Eastern Cape Plains. Sample trees were felled to construct prediction equations, which were subsequently... -
Equations for predicting the biomass of Acacia cyclops and Acacia saligna in the western and eastern Cape regions of South Africa Part 2: Stand-level models
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A. van Laar --- Faculty of Agricultural and Forestry Sciences, J.M. Theron --- Faculty of Agricultural and Forestry Sciences,The study deals with stand-level models for estimating wood biomass for different tree sizes and different biomass categories. It was carried out on farms and nature reserves in three regions. The stratification was identical with that in part 1 of... -
Early growth and survival of Acacia galpinii after planting in a semi-arid environment in Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D. Mlambo --- National University of Science and Technology, Zimbabwe P. Nyathi --- National University of Science and Technology, Zimbabwe P. Milo --- National University of Science and Technology, ZimbabweAcacia galpinii grows naturally on the riverbanks and smaller drainage lines in semi-arid areas ofSouthern Africa. Trial planting of the species as a decorative tree commenced in 1993 along urban roads in Bulawayo, Zimbabwe. Early growth and survival of the... -
Performance of four-year-old Australian and Papua New Guinean Acacia species/provenances at Kongowe, Kibaha, Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: AI Kindo --- Forestry and Beekeeping Division, Tanzania MA Mndolwa --- , Tanzania E Edward --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, Tanzania SAO Chamshama --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, TanzaniaThis study to compare performance of three Australian–Papua New Guinean Acacia species/provenances (A. mangium, A. auriculiformis, A. crassicarpa) and A. julifera was conducted at Kongowe, Kibaha, Tanzania. Species/provenances were evaluated for survival, growth (diameter, height and volume), wood basic density... -
A single dominant Ganoderma species is responsible for root rot of Acacia mangium and Eucalyptus in Sumatra
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MPA Coetzee --- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), South Africa BD Wingfield --- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), South Africa GD Golani --- , Indonesia B Tjahjono --- , Indonesia A Gafur --- , Indonesia MJ Wingfield --- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaGanoderma root rot is the most serious disease affecting commercially planted Acacia mangium in plantations in Indonesia. Numerous Ganoderma spp. have been recorded from diseased trees of this species and to a lesser extent Eucalyptus, causing confusion regarding the primary... -
An allometric equation for estimating stem biomass of Acacia auriculiformis in the north-eastern region of Bangladesh
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jiban Chandra Deb --- Department of Forestry and Environmental Science, Bangladesh Md. Abdul Halim --- Department of Forestry and Environmental Science, Bangladesh Enam Ahmed --- Department of Forestry and Environmental Science, BangladeshTree biomass plays an important role in sustainable management and in estimating forest carbon stocks. The objective of this study was to select the best model for measuring stem biomass of Acacia auriculiformis in the study area. Data from five... -
Comparing normal, lognormal and Weibull distributions for fitting diameter data from Akashmoni plantations in the north-eastern region of Bangladesh
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: I Kayes --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh JC Deb --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh P Comeau --- School of Forest Science and Management, Canada S Das --- Department of Statistics, School of Physical Sciences, BangladeshStatistical probability density functions are widely used to model tree diameter distributions and to describe stand structure. The objective of this study was to compare the performance of normal, logarithmic-normal and three-parameter Weibull distributions for fitting diameter data from Akashmoni... -
Relationships between diameter and height of trees in natural tropical forest in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Wilson A Mugasha --- Department of Ecology and Natural Resource Management, Norway Ole M Bollandsås --- Department of Ecology and Natural Resource Management, Norway Tron Eid --- Department of Ecology and Natural Resource Management, NorwayThe relationship between tree height (h) and tree diameter at breast height (dbh) is an important element describing forest stands. In addition, h often is a required variable in volume and biomass models. Measurements of h are, however, more time... -
The impact of invasive fish and invasive riparian plants on the invertebrate fauna of the Rondegat River, Cape Floristic Region, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: StevenR Lowe DarraghJ Woodford DeanN Impson JennyA DayInvasive fish and plants are widespread in the rivers and riparian zones of the Cape Floristic Region of South Africa and represent potential threats to the highly endemic freshwater fauna. We investigated the impact of invasive smallmouth bass (Micropterus dolomieu)... -
A demographic perspective on bush encroachment by Acacia karroo in Hluhluwe-Imfolozi Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DA Balfour JJ MidgleyAcacia karroo has invaded large areas of the Hluhluwe part of the Hluhluwe-Imfolozi Park, despite the relatively frequent fire regime (mean and median fire frequency of 2.9 and 1.3 years, respectively) of this area. We surveyed A. karroo demography and... -
Impacts of cattle on ecological restoration of coastal forests in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TDE Mpanza PF Scogings NW Kunene AM ZoboloLivestock from communities bordered by dune mining, urban areas and commercial forestry in northern KwaZulu-Natal spend substantial time foraging in the coastal forest that the mining company is obliged to restore. A survey of livestock owners and an experimental study... -
Performance of planted indigenous trees, Acacia galpinii and Faidherbia albida, in semi-arid Botswana
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: KP Walker JM Theron B MosekiTwo popular indigenous browse, shade and poles trees, Acacia galpinii and Faidherbia albida, were evaluated for survival and growth on-farm in Malotwana, Botswana, with a mean annual rainfall of 450 mm. The trial was a two species × three spacing... -
Screening of topical sterilants for shoot apex culture of Acacia mearnsii
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: IM Thompson MD Laing SL Beck-Pay A FosseyThe surface sterilisation procedure is of integral importance to any micropropagation technique. This process should do the least amount of plant damage, whilst reducing microbial contamination to an acceptable level. The objective of this research was to investigate alternative sterilisation... -
Estimating biomass and macronutrient content of some commercially important plantation species in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SB Dovey --- , South AfricaThe removal of biomass, in any combination of stemwood, bark or branch harvesting, can cause a significant increase in nutrient loss from commercial timber plantations. Ensuring long-term site productivity of forest plantations is a key issue for forestry management. Managers... -
Fire can suppress the development of macrophyllous thickets
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Paul Gordijn --- South African Environmental Observation Network, Grasslands, Wetlands and Forests Node, South Africa David Ward --- School of Life Sciences, South AfricaThe ingression of woody plants into savannas, known as bush or shrub encroachment, has become a global concern. Fire has been acknowledged as a key factor in managing woody vegetation in savannas. This study assessed the role of fire in... -
The development of an expert system for arid rangeland management in central Namibia with emphasis on bush thickening
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David Joubert --- Nature Conservation, Namibia Ibo Zimmermann --- Nature Conservation, Namibia Jens Fendler --- Nature Conservation, Namibia Heike Winschiers-Theophilus --- Nature Conservation, Namibia Friedrich P Graz --- Nature Conservation, Namibia Nico Smit --- Animal, Wildlife and Grassland Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Botany Department, South AfricaAn online decision support system derived from research and expert knowledge was developed for arid rangeland management in central Namibia. The expert system emphasises the control of bush thickening and is divided into three forms of decisions: adaptive, reactive and... -
Effects of plantation residue management on the community structure of wattle regeneration invertebrate pests in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Prem Govender --- Research Directorate, Faculty of Health Sciences, South AfricaThere is a limited availability of land for the expansion of South African black wattle plantations. One way to increase productivity is to ensure the survival of seedlings during regeneration, thereby increasing the stocking of compartments. Soil invertebrate pests constitute... -
Acacia plantations in Vietnam: research and knowledge application to secure a sustainable future
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: EK Sadanandan Nambiar --- CSIRO Land and Water Flagship, Black Mountain Laboratories, Australia Christopher E Harwood --- CSIRO Land and Water Flagship, Australia Nguyen Duc Kien --- Vietnamese Academy of Forest Sciences, VietnamVietnam has established 1.1 million ha of acacia plantations for wood production, managed on 5- to 10-year rotation cycles. Nearly 50% of the resource is managed by small growers holding 1–5 ha woodlots. Acacia plantations have emerged as an important... -
Breeding polyploid varieties of tropical acacias: progress and prospects
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Rod Griffin --- School of Biological Sciences, Australia Nghiem Quynh Chi --- Institute for Forest Tree Improvement and Biotechnology, Vietnam Jane L Harbard --- School of Biological Sciences, Australia Do Huu Son --- Institute for Forest Tree Improvement and Biotechnology, Vietnam Christopher E Harwood --- School of Biological Sciences, Australia Aina Price --- School of Biological Sciences, Australia Tran Duc Vuong --- Institute for Forest Tree Improvement and Biotechnology, Vietnam Anthony Koutoulis --- School of Biological Sciences, Australia Ha Huy Thinh --- Institute for Forest Tree Improvement and Biotechnology, VietnamThe paper reviews a decade of progress with breeding new polyploid varieties of Acacia mangium and other tropical acacias in Vietnam, and outlines plans for future strategies to complement conventional diploid breeding. Polyploid breeding is a means of introducing diversity... -
A new screening method for Ganoderma philippii tolerance in tropical Acacia species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Abdul Gafur --- AAA Group Research and Development, Indonesia Aswardi Nasution --- AAA Group Research and Development, Indonesia Muhammad Yuliarto --- AAA Group Research and Development, Indonesia Wong Ching Yong --- AAA Group Research and Development, Indonesia Mukesh Sharma --- AAA Group Research and Development, IndonesiaRed root rot disease caused by Ganoderma philippii is one of the most economically important diseases of tropical Acacia species. Research on field control of the disease has to date focused on inoculum reduction, silviculture practices and application of biological... -
Acacia mearnsii industry overview: current status, key research and development issues
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Julian Moreno Chan --- Institute for Commercial Forestry Research, South Africa Philip Day --- NTE Company (Pty) Ltd, South Africa John Feely --- Forestry consultant, South Africa Rob Thompson --- NCT Forestry Co-operative Ltd, South Africa Keith M Little --- School of Natural Resource Management, South Africa Craig H Norris --- NCT Forestry Co-operative Ltd, South AfricaAcacia mearnsii De Wild (black wattle) is an important plantation species for tannin production and woodchip exports in South Africa and Brazil. This study provides an updated overview of the black wattle industries in both countries, including planted areas and... -
Applied disease screening and selection program for resistance to vascular wilt in Hawaiian Acacia koa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nicklos S Dudley --- Hawai'i Agriculture Research Center, USA Tyler C Jones --- Hawai'i Agriculture Research Center, USA Robert L James --- Plant Disease Consulting Northwest, USA Richard A Sniezko --- United States Department of Agriculture Forest Service, USA Phil Cannon --- United States Department of Agriculture, USA Dulal Borthakur --- University of Hawai'i at Manoa, USAAcacia koa is a valuable tree species economically, ecologically and culturally in Hawai'i. A vascular wilt disease of A. koa resulting from infection by the fungal pathogen Fusarium oxysporum f. sp. koae (FOXY) causes high rates of mortality in field... -
Evaluating the inheritance of Ceratocystis acaciivora symptom expression in a diverse Acacia mangium breeding population
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jeremy Brawner --- Forest Industries Research Centre, Australia Yani Japarudin --- Sabah Softwood Berhad, Malaysia Mahadir Lapammu --- Sabah Softwood Berhad, Malaysia Redzuan Rauf --- Sabah Softwood Berhad, Malaysia David Boden --- Boden and Associates Pty Ltd, Australia Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute, South AfricaA dramatic rise in the incidence of a serious canker and wilt disease of Acacia mangium has led to the replacement of thousands of hectares of plantation forests in eastern Sabah. A disease screening program was initiated to evaluate levels... -
The potential of Vachellia kosiensis (Acacia kosiensis) as a dryland forestry species in terms of its water use, growth rates and resultant water-use efficiency
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mark B Gush --- CSIR Natural Resources and the Environment, South AfricaThe potential of the country’s numerous indigenous tree species to address challenges facing the commercial forestry industry in South Africa is under-explored. Relevant issues include the rising demand for timber and non-timber forest products due to population and economic growth,... -
Effect of frequency and height of cutting on growth parameters of Acacia saligna in Egypt
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ahmed A Kandil --- Agronomy Department, Faculty of Agriculture, Egypt Ali E Sharief --- Agronomy Department, Faculty of Agriculture, EgyptTo revegetate acacia trees in saline desert sandy soils, field experiments were conducted to study the effect of cutting frequency and height on Acacia saligna productivity during 2014, 2015 and 2016. The tallest plants, thickest stems and highest values for... -
The bionomics of whitegrub species (Coleoptera: Scarabaeidae) affecting commercial forestry re-establishment in representative areas of the South African summer-rainfall region
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Derian Echeverri-Molina --- Department of Biology, School of Science and Technology, Sefako Makgatho Health Sciences University, South Africa Prem Govender --- Research and Postgraduate Studies Directorate, Sefako Makgatho Health Sciences University, South AfricaSouth African commercial forestry plants mainly Eucalyptus, Pinus and Acacia species. Invertebrate pests play a significant role in the establishment phase of these exotic trees. Whitegrubs, in particular, are known to affect seedling survival during this period. Their pest status... -
Fungicides and an insecticide tested for the control of wattle rust and brown wattle mirid in Acacia mearnsii plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Keith Little --- , South AfricaBlack wattle is planted on 110 000 ha in South Africa, and considered economically important for both private and commercial growers. Black wattle is intensively managed, with protection from abiotic and biotic risk factors forming an important component of any... -
Impacts and trapping of ambrosia beetles Euwallacea fornicatus and E. similis in Acacia plantations in Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tran Xuan Hung --- Vietnamese Academy of Forest Sciences, Vietnam Pham Quang Thu --- Vietnamese Academy of Forest Sciences, Vietnam Nguyen Minh Chi --- Vietnamese Academy of Forest Sciences, Vietnam Le Van Binh --- Vietnamese Academy of Forest Sciences, Vietnam Bernard Dell --- Vietnamese Academy of Forest Sciences, VietnamThere are over two million hectares of Acacia plantations in Vietnam and loss from infestations of ambrosia beetles is of increasing concern. In this study, we first determined the key taxa and the extent of damage, and then identified effective...