Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 126
SUMMARY A range of endemic and exotic insect viruses and protozoa have
been tested for oral infectivity to grass grub ( Costelytra zealandica ) , Argentine
stem weevil ( Listronotus bonariensis ) , porina ( Wiseana spp . ) , greasy
cutworm ...
SUMMARY A range of endemic and exotic insect viruses and protozoa have
been tested for oral infectivity to grass grub ( Costelytra zealandica ) , Argentine
stem weevil ( Listronotus bonariensis ) , porina ( Wiseana spp . ) , greasy
cutworm ...
Page 148
Growers have experimented with a wide range of insecticides but have been
unable to obtain effective control . The objective of these trials was to screen a
range of chemicals against whitefly to provide recommendations for growers at
the ...
Growers have experimented with a wide range of insecticides but have been
unable to obtain effective control . The objective of these trials was to screen a
range of chemicals against whitefly to provide recommendations for growers at
the ...
Page 237
... seconds in a range of aqueous concentrations to produce mortalities in the
range of 5 - 95 % . A control group was dipped in water . After treatment , the
mites were maintained at 25 + 2 °C and 70 - 80 % RH for 24 hours after which
mortality ...
... seconds in a range of aqueous concentrations to produce mortalities in the
range of 5 - 95 % . A control group was dipped in water . After treatment , the
mites were maintained at 25 + 2 °C and 70 - 80 % RH for 24 hours after which
mortality ...
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Contents
Presidential Address | 13 |
Effect of application volume and spray additive concentration on the control | 89 |
The effect of metsulfuron on sweet brier M McD Turner G Iggo | 95 |
Copyright | |
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Common terms and phrases
activity adult aphid application asparagus assessed Auckland block caused Centre chemicals clopyralid compared counts cover crop damage density DISCUSSION disease DSIR effect eggs emergence establishment experiments field formulation four fruit fungicides gave glyphosate gorse grass grass grub ground growth Hamilton harvest height herbicide higher important increased indicated infested insect insecticide kg ai/ha larvae leaf leaves less levels lower lucerne March Mean measured METHODS months mortality North numbers observed occurred P.O. Box pasture Pest Control Conf plants plots population present Private Proc production pupae ragwort range rates reduced REFERENCES replicates reported Research residues root ryegrass samples scale season seed seedlings showed significant significantly similar soil spears species spray spring stage stem Table tested thistle treated treatments trees trials untreated vines Weed and Pest weed control weeks weevil whitefly yield Zealand