Proceedings of the New Zealand Weed and Pest Control Conference1969 - Pesticides |
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Page 215
... infection in untreated plots was 80 % , but 10 to 20 % in treated . The yields were 50 bu and 66 bu per acre , respectively . It is apparent that in this trial there had been some primary infection from autumn flights , that some ...
... infection in untreated plots was 80 % , but 10 to 20 % in treated . The yields were 50 bu and 66 bu per acre , respectively . It is apparent that in this trial there had been some primary infection from autumn flights , that some ...
Page 224
... infection with BYDV occurs in May and early June when aphids are still flying . Centres of infection and of aphids become established within crops . Secondary spread is of major importance and occurs in August , September and October ...
... infection with BYDV occurs in May and early June when aphids are still flying . Centres of infection and of aphids become established within crops . Secondary spread is of major importance and occurs in August , September and October ...
Page 28
... infection with the result lodging occurs . Trials in Europe ( Caldicott and Lindley , 1964 ) with the growth regu- lator chlormequat have shown that lodging caused by C. herpotrichoides could be prevented . The purpose of the following ...
... infection with the result lodging occurs . Trials in Europe ( Caldicott and Lindley , 1964 ) with the growth regu- lator chlormequat have shown that lodging caused by C. herpotrichoides could be prevented . The purpose of the following ...
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