Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 140
There was a correlation in all localities between crawler numbers trapped at the
top of the trunk and numbers trapped on the four sites above the trunk ( Te Puke
sample I r = 0 . 84 , n = 45 , sample II r = 0 . 26 , n = 54 ; Matahui r = 0 . 53 , n = 69
...
There was a correlation in all localities between crawler numbers trapped at the
top of the trunk and numbers trapped on the four sites above the trunk ( Te Puke
sample I r = 0 . 84 , n = 45 , sample II r = 0 . 26 , n = 54 ; Matahui r = 0 . 53 , n = 69
...
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 ...
Page 254
RESULTS Numbers of RGA in unsprayed barley ( Trial 1 ) rose above 1 / tiller in
late September and fell to this level again in early December . Two peaks in
aphid numbers occurred in sprayed plots – before spraying , and after the period
of ...
RESULTS Numbers of RGA in unsprayed barley ( Trial 1 ) rose above 1 / tiller in
late September and fell to this level again in early December . Two peaks in
aphid numbers occurred in sprayed plots – before spraying , and after the period
of ...
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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