Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 136
DISCUSSION No treatment gave 100 % control of mature third instar greedy scale ( Figure 1 ) . Mortality on the untreated and insecticide - treated vines was not significantly different for the first 2 weeks after treatment .
DISCUSSION No treatment gave 100 % control of mature third instar greedy scale ( Figure 1 ) . Mortality on the untreated and insecticide - treated vines was not significantly different for the first 2 weeks after treatment .
Page 170
Visual ratings of phytotoxicity symptoms on a 0-10 scale and % vigour were made seven times . On 18 January the first evidence of phytotoxicity was observed on plants treated with simazine . The symptoms were interveinal chlorosis ...
Visual ratings of phytotoxicity symptoms on a 0-10 scale and % vigour were made seven times . On 18 January the first evidence of phytotoxicity was observed on plants treated with simazine . The symptoms were interveinal chlorosis ...
Page 209
A total of 235 ha was treated and without exception the growers considered being able to use clopyralid during the picking season a considerable advantage . Virtually all emerged thistle shoots died within the six weeks of treatment ...
A total of 235 ha was treated and without exception the growers considered being able to use clopyralid during the picking season a considerable advantage . Virtually all emerged thistle shoots died within the six weeks of treatment ...
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Contents
Author Index | 9 |
PASTURE PESTS | 15 |
Field testing of seed protectants against black field cricket attack | 22 |
Copyright | |
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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