Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 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 the season it ...
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 the season it ...
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 stage ...
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 stage ...
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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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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