Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 47
Herbicide Rate ( kg ai / ha ) Weed cover ( % ) Seedlings / m ? June Crop injury (
% ) Seed yield kg / ha asulam 103 0 . 75 1 . 50 2 . 25 82 580 700 500 440 530
560 ethofumesate 0 . 5 78 100 1 . 0 88 methabenzthiazuron 1 . 0 103 690 2 .
Herbicide Rate ( kg ai / ha ) Weed cover ( % ) Seedlings / m ? June Crop injury (
% ) Seed yield kg / ha asulam 103 0 . 75 1 . 50 2 . 25 82 580 700 500 440 530
560 ethofumesate 0 . 5 78 100 1 . 0 88 methabenzthiazuron 1 . 0 103 690 2 .
Page 204
6 kg ai / ha reduced yield or quality of spears in two successive harvest seasons .
Information was gained on the sensitivity of a number of weed species .
INTRODUCTION Perennial weeds pose a continuing problem in asparagus beds
.
6 kg ai / ha reduced yield or quality of spears in two successive harvest seasons .
Information was gained on the sensitivity of a number of weed species .
INTRODUCTION Perennial weeds pose a continuing problem in asparagus beds
.
Page 221
TABLE 2 : Black Nightshade control in Trial I . Rate ( kg ai / ha ) Timing &
equipment % Black nightshade control Weed * score Treatment alachlor 3 . 0 91a
? 1 . 4 ZS 93a alachlor + trifluralin EPTC + 3 0 . 8 5 . 8 PPSI , r / tiller PPSI , r / tiller
PPSI ...
TABLE 2 : Black Nightshade control in Trial I . Rate ( kg ai / ha ) Timing &
equipment % Black nightshade control Weed * score Treatment alachlor 3 . 0 91a
? 1 . 4 ZS 93a alachlor + trifluralin EPTC + 3 0 . 8 5 . 8 PPSI , r / tiller PPSI , r / tiller
PPSI ...
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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