Proceedings of the New Zealand Weed and Pest Control Conference1969 - Pesticides |
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Page 214
... disease was not recognized until further trial work was completed in the 1958-9 and 1960-1 seasons ( Smith and Allen , 1962 ) . In the 1962-3 season , many trials demonstrated the importance of BYDV in wheat crops and the control ...
... disease was not recognized until further trial work was completed in the 1958-9 and 1960-1 seasons ( Smith and Allen , 1962 ) . In the 1962-3 season , many trials demonstrated the importance of BYDV in wheat crops and the control ...
Page 236
... disease . However , it is probable that , with heavy infestations , plants suffer directly from the effects of the aphids feeding on them . Such effects , however , cannot be measured as they cannot be separated from virus effects . On ...
... disease . However , it is probable that , with heavy infestations , plants suffer directly from the effects of the aphids feeding on them . Such effects , however , cannot be measured as they cannot be separated from virus effects . On ...
Page 337
... disease , despite the presence of aphids . The disease problem is thus less severe in the North Island and is further eased by the use of Gamenya wheat which appears to be the most resistant variety . Although Mr Blackmore stressed the ...
... disease , despite the presence of aphids . The disease problem is thus less severe in the North Island and is further eased by the use of Gamenya wheat which appears to be the most resistant variety . Although Mr Blackmore stressed the ...
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