Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
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Page 122
... period in spring by 2-3 weeks . However the net effect of this may be negligible because of density - dependent mortality in Sitona weevil larval stage . Early in the 1986 reproductive season infection levels were between 40 and 55 ...
... period in spring by 2-3 weeks . However the net effect of this may be negligible because of density - dependent mortality in Sitona weevil larval stage . Early in the 1986 reproductive season infection levels were between 40 and 55 ...
Page 196
... period of weed competition in most vegetable crops , including asparagus , is during the establishment phase ( Welker and Brogdon 1972 , Zimdahl 1980 ) . Once the asparagus fern is established and has formed a canopy , competition by ...
... period of weed competition in most vegetable crops , including asparagus , is during the establishment phase ( Welker and Brogdon 1972 , Zimdahl 1980 ) . Once the asparagus fern is established and has formed a canopy , competition by ...
Page 254
... period of effective insecticide cover on the foliage . Immediately after spraying numbers fell below 1 / tiller . Tables 1 and 2 show data on plant growth stage and aphid population density at each peak , together with aphid burdens ...
... period of effective insecticide cover on the foliage . Immediately after spraying numbers fell below 1 / tiller . Tables 1 and 2 show data on plant growth stage and aphid population density at each peak , together with aphid burdens ...
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