Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 123
Sample sizes ranged from 30-50 weevils depending on their availability . To test for variability in infection levels from season to season , samples were again taken from the same lucerne stand on 10.4.86 , 28.5.86 and 7.6.86 .
Sample sizes ranged from 30-50 weevils depending on their availability . To test for variability in infection levels from season to season , samples were again taken from the same lucerne stand on 10.4.86 , 28.5.86 and 7.6.86 .
Page 134
Samples were collected at fortnightly intervals over 2 months . A pre - spray sample was also taken to assess stage composition of the population and natural scale mortality on all treatment vines . Greedy scale samples consisted of ...
Samples were collected at fortnightly intervals over 2 months . A pre - spray sample was also taken to assess stage composition of the population and natural scale mortality on all treatment vines . Greedy scale samples consisted of ...
Page 139
Unpublished data from leaf samples showed a steady increase in infestation levels as the season progressed , and fruit samples showed an increasing infestation from mid - February onwards . Mean crawler numbers over all sampling ...
Unpublished data from leaf samples showed a steady increase in infestation levels as the season progressed , and fruit samples showed an increasing infestation from mid - February onwards . Mean crawler numbers over all sampling ...
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Contents
Author Index | 9 |
PASTURE PESTS | 15 |
Field testing of seed protectants against black field cricket attack | 22 |
Copyright | |
31 other sections not shown
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activity adult aphid application asparagus assessed Auckland block caused 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 kill 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