Now showing items 1-5 of 5
Population dynamics of the root-knot nematodes meloidogyne incognita (kofoid & white) chitwood and m. javanica (treub) chitwood on grapevines in two different regions of South Africa
(South African Society for Enology and Viticulture, 1987)
Two root-knot nematode species, Me/oidogyne incognita and M.javanica, were studied with regard to their seasonal population fluctuations on grapevines growing in two vastly different climatic areas. Regular observations ...
Strategies for chemical control of root-knot nematodes (meloidogyne spp.) in established vineyards
(South African Society for Enology and Viticulture, 1986)
Grape-vine root growth was measured for vertical and horizontal distribution as well as seasonal growth periods. The persistance of aldicarb and fenamiphos in the soil as well as in leaves and fruit of grape-vines was ...
Arthropod communities of Proteaceae with special emphasis on plant-insect interactions
(Stellenbosch : Stellenbosch University, 1989)
ENGLISH ABSTRACT: Arthropod communities of five proteaceous species viz. Protea repens. P. neriifolia. P.cynaroides, Leucospermum cordifolium and Leucadendron /aureolum were studied. A faunal list of the insects was compiled ...
'n Bydrae tot die biologie en beheer van die valskodlingmot Cryptophlebia leucotreta (Meyr.) (Lepidoptera : Eucosmidae) op nawels
(Stellenbosch : Stellenbosch University, 1981-12)
EKSERP: Vanwee die voortdurende probleme wat die valskodlingmot, Cryptoph lebia leucotreta (Meyr.), by die verbouing van nawels in die Oos-Transvaalse Laeveld daarstel, is 'n indringende studie van hierdie insekprobleem ...
The influence of mountain catchment area control measures on land management in the groot-Winterhoek area of the Western-Cape : ecological, economic and social implications
(Stellenbosch : Stellenbosch University, 1985)
ENGLISH ABSTRACT: This study is about conservation of water source areas. The study area comprises the Groot Winterhoek Mountain Catchment Area, as proclaimed in terms of the Mountain Catchment Areas Act (No. 63 of 1970) ...