Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 15
... grass grub ( Costelytra zealandica ) in pasture . A conventional 10 tonne agricultural roller gave no significant grass grub mortality or pasture yield increase . The other rollers which were specially constructed for grass grub control ...
... grass grub ( Costelytra zealandica ) in pasture . A conventional 10 tonne agricultural roller gave no significant grass grub mortality or pasture yield increase . The other rollers which were specially constructed for grass grub control ...
Page 17
... Grass Grub Ten days before treatments were applied , the grass grub population was 486 / m2 . The vertical distribution of grass grub between the 0-50 mm , 50-100 mm , and 100-150 mm levels was 56 % , 32 % and 12 % respectively ...
... Grass Grub Ten days before treatments were applied , the grass grub population was 486 / m2 . The vertical distribution of grass grub between the 0-50 mm , 50-100 mm , and 100-150 mm levels was 56 % , 32 % and 12 % respectively ...
Page 19
... grass grub ( Costelytra zealandica ) . Up to 66 % control of larvae was achieved during March and April provided soil moisture was near to field capacity . Rolling in May and August produced lower grass grub mortality . Grass grub ...
... grass grub ( Costelytra zealandica ) . Up to 66 % control of larvae was achieved during March and April provided soil moisture was near to field capacity . Rolling in May and August produced lower grass grub mortality . Grass grub ...
Contents
Author Index | 9 |
PASTURE PESTS | 15 |
Field testing of seed protectants against black field cricket attack | 22 |
Copyright | |
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39th N.Z. Weed adult alachlor aphid application asparagus assessed atrazine beetle benomyl biological control buprofezin BYDV Californian thistle captafol chemicals chlorpyrifos clopyralid cover crawlers crop damage density diazinon discoideus disease DSIR effect eggs fensulfothion field foliage formulation fruit fungicides glyphosate gorse grass grub greedy scale growers growth haloxyfop EE harvest herbicides hexazinone increased infested insect insecticide insensitive instar kg ai/ha kiwifruit larvae leaf litres litres/ha lucerne metalaxyl metsulfuron mg ai/litre miticides mortality nematodes numbers orchard P.O. Box Palmerston North paraquat parasite pasture pathogens persimilis Pest Control Conf pesticides plants plots population porina Proc prochloraz ragwort rates reduced regrowth replicates Research residues root Ruakura ryegrass samples season seed treatments seedlings significant significantly Silwet Sitona soil spears species spray sprayer surfactant Table tamarillo tested trees trials trifluralin untreated control vinclozolin vines Weed and Pest weed control weeks whitefly yield Zealand