Proceedings of the New Zealand Weed and Pest Control Conference1985 - Pesticides |
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Page 184
... aphid numbers of spring barley was delayed at higher altitudes , where aphid numbers in spring were lower than at Lincoln . INTRODUCTION The rose - grain aphid was first found in New Zealand in 1982 when heavy infestations were recorded ...
... aphid numbers of spring barley was delayed at higher altitudes , where aphid numbers in spring were lower than at Lincoln . INTRODUCTION The rose - grain aphid was first found in New Zealand in 1982 when heavy infestations were recorded ...
Page 186
... aphid infestations in spring - sown barley crops was surveyed during November and December 1984 in the Kirwee and Methven areas . Table 4 compares mean aphid counts / tiller and plant growth stages ( Zadoks et al 1974 ) recorded in ...
... aphid infestations in spring - sown barley crops was surveyed during November and December 1984 in the Kirwee and Methven areas . Table 4 compares mean aphid counts / tiller and plant growth stages ( Zadoks et al 1974 ) recorded in ...
Page 190
Courtenay Rose - grain aphid numbers in the barley crop increased in late November to a peak > 100 / tiller , and declined during December . Pirimicarb treatment at GS 41 reduced the infestation by approximately 1000 aphid days in the ...
Courtenay Rose - grain aphid numbers in the barley crop increased in late November to a peak > 100 / tiller , and declined during December . Pirimicarb treatment at GS 41 reduced the infestation by approximately 1000 aphid days in the ...
Contents
Author Index | 8 |
Annual Report | 14 |
Differences in susceptibility of grass grub in Taranaki to organophosphate | 27 |
Copyright | |
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38th N.Z. Weed adults alachlor aphid apple application assessed Auckland autumn barley bioassay blueberries bushes chemical chlormethazole chlorpyrifos Christchurch clopyralid crop cultivars cypermethrin daisy damage daminozide diazinon DSIR effect fensulfothion fertiliser field trials flowering fruit fungicide gave glyphosate gorse greedy scale growers growth Hamilton harvest herbicides hexazinone infested insect insecticides kg ai/ha kill kiwifruit larvae leafroller levels Lincoln lindane litres litres/ha loam loliae lolitrem lucerne metsulfuron-methyl mites miticides mortality nematodes numbers oxadiazon oxyfluorfen P.O. Box Palmerston North pasture peach seedlings pellets Pest Control Conf phylloxera picloram plants plots populations porina post-emergence Private Proc pruning ragwort rates reduced replicates residual rhizome root Ruakura ryegrass samples season seed treatment significant significantly simazine soil species spray St John's wort stem weevil sward Table terbufos tested thistle tiller treated triadimenol trifluralin unsprayed untreated vines Waikato Weed and Pest weed control white clover yield Zealand