Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 209
209 Thistles were most susceptible during the bolting stage when they were growing most actively , followed by the rosette stage . The early flowering stage took the longest time to die down but as this usually occurred at the end of ...
209 Thistles were most susceptible during the bolting stage when they were growing most actively , followed by the rosette stage . The early flowering stage took the longest time to die down but as this usually occurred at the end of ...
Page 242
Crop Stage Pests Effects seedling black beetle ( adults ) Argentine stem weevil slugs reduce plant establishment cutworm young plant at 2-4 leaf stage 6 leaf stage to cob ripening armyworm reduces plant stand and hence potential yield ...
Crop Stage Pests Effects seedling black beetle ( adults ) Argentine stem weevil slugs reduce plant establishment cutworm young plant at 2-4 leaf stage 6 leaf stage to cob ripening armyworm reduces plant stand and hence potential yield ...
Page 253
Aphid numbers were reduced by an application during the stem extension stage of plant growth but numbers recovered during the flowering to milky - ripe stages . This recovery was less in barley sprayed at the flag leaf sheath extension ...
Aphid numbers were reduced by an application during the stem extension stage of plant growth but numbers recovered during the flowering to milky - ripe stages . This recovery was less in barley sprayed at the flag leaf sheath extension ...
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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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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