Articles by Author: Ljc Erasmus

Search results for Ljc Erasmus

We found 36 results for you
  1. An Approach towards Promoting Progress with the Control of Woody Alien Invasive Plants in Natal

    Item type: Journal Article • Journal: South African Forestry Journal
    Effective mechanical and chemical control techniques have been developed for almost all the important woody, alien, invasive plants in Natal. Despite this, progress with the actual control of these plants has been disappointing. Possible reasons for this include poor control...
  2. Screening of candidate herbicides in field trials for chemical control of <em>Chromolaena odorata</em>

    Screening of candidate herbicides in field trials for chemical control of <em>Chromolaena odorata</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A range of concentrations of a number of herbicides was tested in field trials, for the control of Chromolaena odorata (L.) R.M. King and H. Robinson. The results obtained show that triclopyr, 2,4,5-T and tebuthiuron were consistently the most effective,...
  3. Towards costing chemical control of <em>Lantana camara</em> L.

    Towards costing chemical control of <em>Lantana camara</em> L.

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Six herbicide treatments are registered in South Africa for the control of Lantana camara L. (lantana). Three of the treatments were selected for a costing analysis of the initial control of lantana, based on their suitability for specific situations in...
  4. Cabbage seed germination for the assessment of adjuvant effects on 2, 4-D iso-octyl ester volatility

    Cabbage seed germination for the assessment of adjuvant effects on 2, 4-D iso-octyl ester volatility

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The germination rate of cabbage seeds (Brassica oleracea cv. Hercules) exposed to the vapour of the 2,4-dichlorophenoxy iso-octyl ester (2,4-D IOE) was used in a bioassay to determine the effectiveness of commercial adjuvants in reducing the volatility of this hormonal...
  5. Improving seed germination of <em>Stylosanthes guianensis</em> by means of warm water treatment

    Improving seed germination of <em>Stylosanthes guianensis</em> by means of warm water treatment

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of different warm water treatments on the dormancy of hard-coated Stylosanthes guianensis seeds was investigated. Light and dark coloured seeds were placed into water at different temperatures. Warm water treatments induced a large number of soft-coated seeds. The...
  6. Maize cropping system analysis and economic comparison for two environments

    Maize cropping system analysis and economic comparison for two environments

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of different maize cropping systems and economic implications were investigated at two localities from 1994 to 2000. Soil types differed, and the topsoil at Bloekomspruit and Viljoenskroon contained 17% and 5% clay, respectively. The five primary cropping systems...
  7. A quantitative study to assess standing biomasses of macrobenthos in soft substrata of the swartkops Estuary, South Africa

    A quantitative study to assess standing biomasses of macrobenthos in soft substrata of the swartkops Estuary, South Africa

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Totals of 44 intertidal and 19 subtidal transects were surveyed in the soft substrata of the non-marshland areas of the Swartkops Estuary. The sampling method (quadrat, suction and spear) depended on the substratum and the dominant macrobenthic species. Sampling effectiveness...
  8. The status of the South African beach-seine and gill-net fisheries

    The status of the South African beach-seine and gill-net fisheries

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Initial estimates indicate that there are at least 7 000 fishermen active in fisheries using beach-seine and gill nets in South Africa, mostly (86%) along the West and South coasts. Those fishermen utilize 1 373 registered and 458 illegal nets...
  9. An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

    An evaluation of attitudes and responses to monitoring and management measures for the South African boat-based linefishery

    Item type: Journal Article • Journal: South African Journal of Marine Science
    The boat-based linefishery in South African waters was investigated between 1994 and 1996. Methods involved a combination of access point and questionnaire surveys to collect catch and effort data, and to assess responses to management measures by the commercial and...