Proceedings of the New Zealand Weed and Pest Control Conference1969 - Pesticides |
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Page 234
... aphid infestation in relation to the maturity of the crop was demonstrated . The difference in yield of 9.6 bu / acre between the early sprayed and unsprayed plots was reduced to 5.1 bu / acre through delaying the spray by 13 days ...
... aphid infestation in relation to the maturity of the crop was demonstrated . The difference in yield of 9.6 bu / acre between the early sprayed and unsprayed plots was reduced to 5.1 bu / acre through delaying the spray by 13 days ...
Page 236
APHID CONTROL IN WHEAT AND BARLEY ( Wanganui , Rangitikei , Rangitikei , Manawatu , Wairarapa ) L. W. BLACKMORE Research Division , Department of Agriculture , Palmerston North Summary The results of attempts to control the cereal aphid ...
APHID CONTROL IN WHEAT AND BARLEY ( Wanganui , Rangitikei , Rangitikei , Manawatu , Wairarapa ) L. W. BLACKMORE Research Division , Department of Agriculture , Palmerston North Summary The results of attempts to control the cereal aphid ...
Page 241
... aphid . The specific factors are time of sowing , altitude and varietal sus- ceptibility . It is also important to know to what extent the grain aphid is affected by these same factors . ( 2 ) Results to date indicate beyond all doubt ...
... aphid . The specific factors are time of sowing , altitude and varietal sus- ceptibility . It is also important to know to what extent the grain aphid is affected by these same factors . ( 2 ) Results to date indicate beyond all doubt ...
Contents
Presidential Address W F Leonard | 15 |
Control of Hornwort Ceratophyllum demersum B E Manson | 23 |
Endothal as an Aquatic Herbicide G W Woon and G W Mason | 30 |
Copyright | |
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Common terms and phrases
abAB acre aphid application areas assessment asulam atrazine Auckland Australian soldier fly autumn barley grass bromus mollis BYDV Canterbury carbetamide cereal aphid chemical chlormequat Christchurch crop damage Department of Agriculture diazinon dicamba diquat disulfoton dry matter effect ester farm farmers fathen fenitrothion fensulfothion formulations gorse grain gran granules grass grub grazing growth harvest heptachlor herbicides increase infestation insecticide ioxynil larvae lb/acre lindane linuron lucerne matagouri MCPA MCPB means and signif methabenzthiazuron mixture N.Z. Weed organophosphate P.O. Box paddock paraquat parathion pasture response peas Pest Control Conf phenmedipham phorate picloram plants plots porina post-emergence Proc production prometryne pyrazon rainfall rates reduced replicates residual ryegrass samples season significant simazine soil sowing sown species spraying Stat Summary Table terbutryne thistle tion Total treated Treatment lb trials trichlorfon Untreated variety Weed & Pest weed control weed seeds wheat white clover willow weed yield Zealand