Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 15
CONTROL OF GRASS GRUB BY FOUR TYPES OF ROLLER K.M. STEWART and R.F. VAN TOOR Invermay Agricultural Research Centre , Private Bag , Mosgiel SUMMARY Four types of heavy roller were tested for the control of grass grub ( Costelytra ...
CONTROL OF GRASS GRUB BY FOUR TYPES OF ROLLER K.M. STEWART and R.F. VAN TOOR Invermay Agricultural Research Centre , Private Bag , Mosgiel SUMMARY Four types of heavy roller were tested for the control of grass grub ( Costelytra ...
Page 158
Each treatment consisted of four replications of five fruits each . Fruits were removed when disease was first detected or when fully ripe ( c 2 days after full colour change ) . Infection was assessed on an arbitrary scale ( 0-3 ) ...
Each treatment consisted of four replications of five fruits each . Fruits were removed when disease was first detected or when fully ripe ( c 2 days after full colour change ) . Infection was assessed on an arbitrary scale ( 0-3 ) ...
Page 260
Four of the plots were chosen at random and given a pre - emergence treatment of herbicide ( alachlor and atrazine ( Rahman 1980 ) ) while the remaining eight were broadcast with a grass / weed seed mixture ( Yates “ bush burn ” ) .
Four of the plots were chosen at random and given a pre - emergence treatment of herbicide ( alachlor and atrazine ( Rahman 1980 ) ) while the remaining eight were broadcast with a grass / weed seed mixture ( Yates “ bush burn ” ) .
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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 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