Proceedings of the New Zealand Weed and Pest Control Conference1969 - Pesticides |
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Page 230
... loss of yield Volume of seed ( cc ) Bushel weight ( lb ) TABLE 3 Infested Check 13,003 12,392 286.3 402.3 32.25 0 ... Loss of yield FIG . 2 : Correlation between aphid populations present on seven wheat varieties and the subsequent loss ...
... loss of yield Volume of seed ( cc ) Bushel weight ( lb ) TABLE 3 Infested Check 13,003 12,392 286.3 402.3 32.25 0 ... Loss of yield FIG . 2 : Correlation between aphid populations present on seven wheat varieties and the subsequent loss ...
Page 78
... loss of dry matter cannot be predicted except roughly for any particular material and rate of application . Whether this loss will be felt by the farmer will depend on the following weather conditions . Herbicides are a valuable aid but ...
... loss of dry matter cannot be predicted except roughly for any particular material and rate of application . Whether this loss will be felt by the farmer will depend on the following weather conditions . Herbicides are a valuable aid but ...
Page 152
... loss from mineral soils as moisture increased , and a decreased loss with moisture from organic soils which he attributed to adsorption by the organic colloids . To avoid losses from these causes , the practice of soil incorporation was ...
... loss from mineral soils as moisture increased , and a decreased loss with moisture from organic soils which he attributed to adsorption by the organic colloids . To avoid losses from these causes , the practice of soil incorporation was ...
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