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Are soil-borne diseases depressing yields of continuously-grown maize in Natal?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. Channon --- , Republic of South Africa M. P.W. Farina --- , Republic of South AfricaLong-term field trials suggest that yields are declining where maize (Zea mays L.) is grown continuously in some parts of Natal. Available evidence indicates that the decline is not ascribable to soil fertility or climatic constraints and the possibility exists... -
Influence of crop production practices on Pythium infections and yield of winter wheat in fumigated and non-fumigated soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.B. Scott --- Small Grain Centre, Republic of South Africa W.H. Kilian --- Small Grain Centre, Republic of South Africa W.S. Miles --- Small Grain Centre, Republic of South AfricaField trials consisting of different tillage and soil fertility treatments were conducted to study possible causes of yield decline of monoculture winter wheat in the eastern Orange Free State. Soil fumigation with methyl bromide enhanced plant growth, reduced Pythium infections... -
Soil fumigation for lettuce production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.M. Holcroft --- Department of Horticultural Science, Republic of South Africa I.E. Smith --- Department of Horticultural Science, Republic of South AfricaA Clovelly soil in Tala Valley (Natal) was fumigated with different concentrations of dazomet (300, 400, 500 kg ha−1) (granular formulation), and metham sodium (500, 750, 1000 L ha−1) (liquid formulation). Half the treatments were covered with plastic sheets during... -
Open-top chambers to study air pollution impacts in South Africa. Part I: microclimate in open-top chambers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E Heyneke --- School of Environmental Science and Development, South Africa PR Smit --- School of Environmental Science and Development, South Africa L van Rensburg --- School of Environmental Science and Development, South Africa GHJ Krüger --- School of Environmental Science and Development, South AfricaSouth Africa's large industrial growth has created an obvious need to extend, improve and evaluate air pollution impacts on plants in order to assess present-day and future impacts of air pollutants on crop yields. In order to provide guidelines for... -
The effect of canola (Brassica napus) as a biofumigant on soil microbial communities and plant vitality: a pot study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Clarissa Potgieter --- North-West University, South Africa Misha De Beer --- North-West University, South Africa Sarina Claassens --- North-West University, South AfricaCanola (Brassica napus) may be incorporated into soil as a biofumigant for control of pathogens such as Sclerotinia sclerotiorum. Yet, the effect of biofumigants on natural microbial communities required to maintain soil functions is still unclear. A pot experiment with... -
Use of volatile oils of garlic to control the cowpea weevil Callosobruchus maculatus (Bruchidae: Coleoptera)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mahgoub I Abdalla --- Department of Crop Science, Faculty of Natural Resources and Environmental Studies, Sudan Azhari O Abdelbagi --- Department of Crop Protection, Faculty of Agriculture, Sudan Ahmed MA Hammad --- Department of Crop Protection, Faculty of Agriculture, Sudan Mark D Laing --- Discipline of Plant Pathology, School of Agricultural, Earth and Environmental Sciences, South AfricaCowpea weevil causes losses of 50–90% in cowpea after harvest. Control has relied on toxic agrochemical fumigants that are no longer available or are dangerous and relatively expensive, making its control difficult for most farmers. This study was initiated to... -
Weed density and biomass are reduced and plant growth and seed yield increased in common bean after solarisation with clear and black plastic
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Elizabeth Ngadze --- Department of Crop Science, Zimbabwe Arnold B Mashingaidze --- Department of Crop Science, Zimbabwe Julia Sibiya --- Department of Crop Science, ZimbabweCommon bean is highly sensitive to early weed competition, which severely reduces growth and yield. An experiment was carried out in Zimbabwe in the 2002/03 and 2003/04 seasons to assess the effectiveness of solarisation in controlling weeds in beans. Four...