Search
Search results for
We found
4 results for you
-
Effects of 2,4-D iso-octyl ester on the morphology, chlorophyll content and dry mass of lettuce and tomato seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.R. Meinhardt --- Department of Agricultural Development, Republic of South Africa L.P. van Dyk --- Department of Agricultural Development, Republic of South AfricaTomato and lettuce seedlings were exposed to 1 or 3 mm of simulated rainfall containing the auxin-type herbicide 2,4-D iso-octyl ester. They were then evaluated weekly for damage according to symptoms and chlorophyll content. In addition, dry matter production was... -
The influence of varying P concentrations on the yield and abnormalities of lettuce leaves
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. Claassens --- Department of Soil Science and Plant Nutrition, Republic of South AfricaThe effect of varying P concentrations on the growth, yield and development of leaf abnormalities, nutrient content and uptake of other nutrient elements was investigated for lettuce.Three cultivars (Chaparal, Wintercrisp and Robinvale) were studied in sand cultures and soil. The... -
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... -
The impact and control of alien aquatic vegetation in South African aquatic ecosystems
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MP Hill --- Weeds Division, South AfricaWater hyacinth, water lettuce, salvinia, parrot's feather and red water fern are South American aquatic plant species that have become invasive in aquatic ecosystems in South Africa. The lack of indigenous natural enemies and the presence of nutrient rich waters...