Proceedings of the New Zealand Weed and Pest Control Conference, Volume 391986 - Pesticides |
From inside the book
Results 1-3 of 13
Page 253
... aphid ( Metopolophium dirhodum ) on barley was studied in two trials in the 1985-86 season . Aphid numbers were reduced by an application during the stem extension stage of plant growth but numbers recovered during the flowering to ...
... aphid ( Metopolophium dirhodum ) on barley was studied in two trials in the 1985-86 season . Aphid numbers were reduced by an application during the stem extension stage of plant growth but numbers recovered during the flowering to ...
Page 254
... aphid population density at each peak , together with aphid burdens ( AD ) sustained before and after spraying . These data illustrate the following points . 1 . 2 . 3 . 4 . Before spraying , aphid numbers ( < 1-20 / tiller ) and AD ...
... aphid population density at each peak , together with aphid burdens ( AD ) sustained before and after spraying . These data illustrate the following points . 1 . 2 . 3 . 4 . Before spraying , aphid numbers ( < 1-20 / tiller ) and AD ...
Page 256
... aphid ( Rhopalosiphum maidis ) , the rose - grain aphid ( Metopolophium dirhodum ) ( RGA ) ( Gill 1967 ) and the blackberry - cereal aphid ( Sitobion fragariae ) ( Guy et al 1986 ) , all of which occur in Canterbury ( Farrell ...
... aphid ( Rhopalosiphum maidis ) , the rose - grain aphid ( Metopolophium dirhodum ) ( RGA ) ( Gill 1967 ) and the blackberry - cereal aphid ( Sitobion fragariae ) ( Guy et al 1986 ) , all of which occur in Canterbury ( Farrell ...
Contents
Author Index | 9 |
PASTURE PESTS | 15 |
Field testing of seed protectants against black field cricket attack | 22 |
Copyright | |
29 other sections not shown
Other editions - View all
Common terms and phrases
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