Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 148
... present . Control is extremely difficult as tolerant stages are present at the start and end of the life cycle . Whitefly has also developed resistance to some insecticides ( Laska 1981 , Elhag and Horn 1983 ) . Whitefly infested many ...
... present . Control is extremely difficult as tolerant stages are present at the start and end of the life cycle . Whitefly has also developed resistance to some insecticides ( Laska 1981 , Elhag and Horn 1983 ) . Whitefly infested many ...
Page 163
... present on 18 % of leaves . TSM numbers peaked on 13 February when TSM were present on 70 % of leaves with TSM numbers reaching 414 TSM per leaflet . P. persimilis reduced the infestation so that at harvest TSM was found on 1.5 % of ...
... present on 18 % of leaves . TSM numbers peaked on 13 February when TSM were present on 70 % of leaves with TSM numbers reaching 414 TSM per leaflet . P. persimilis reduced the infestation so that at harvest TSM was found on 1.5 % of ...
Page 224
... present in New Zealand and to give a detailed analysis of crop yield . Fewer white butterfly eggs were laid on more densely planted cabbages , although larval survival was apparently higher . Lower numbers of winged cabbage aphids were ...
... present in New Zealand and to give a detailed analysis of crop yield . Fewer white butterfly eggs were laid on more densely planted cabbages , although larval survival was apparently higher . Lower numbers of winged cabbage aphids were ...
Contents
Author Index | 9 |
PASTURE PESTS | 15 |
Field testing of seed protectants against black field cricket attack | 22 |
Copyright | |
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39th N.Z. Weed adult alachlor aphid application asparagus assessed atrazine beetle benomyl biological control buprofezin BYDV Californian thistle captafol chemicals chlorpyrifos clopyralid cover crawlers crop damage density diazinon discoideus disease DSIR effect eggs fensulfothion field foliage formulation fruit fungicides glyphosate gorse grass grub greedy scale growers growth haloxyfop EE harvest herbicides hexazinone increased infested insect insecticide insensitive instar kg ai/ha kiwifruit larvae leaf litres litres/ha lucerne metalaxyl metsulfuron mg ai/litre miticides mortality nematodes numbers orchard P.O. Box Palmerston North paraquat parasite pasture pathogens persimilis Pest Control Conf pesticides plants plots population porina Proc prochloraz ragwort rates reduced regrowth replicates Research residues root Ruakura ryegrass samples season seed treatments seedlings significant significantly Silwet Sitona soil spears species spray sprayer surfactant Table tamarillo tested trees trials trifluralin untreated control vinclozolin vines Weed and Pest weed control weeks whitefly yield Zealand