Proceedings of the New Zealand Weed and Pest Control Conference1969 - Pesticides |
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Page 212
... flights to crops that were sown in autumn . The plants appear to have reached an unacceptable stage in most seasons by the time flights begin . The aphid can , however , severely infest crops of wheat or barley sown in spring . In these ...
... flights to crops that were sown in autumn . The plants appear to have reached an unacceptable stage in most seasons by the time flights begin . The aphid can , however , severely infest crops of wheat or barley sown in spring . In these ...
Page 214
... flight data for Lincoln for eight years from 1959 to 1966. This has shown that the spring aphid flights begin in September and end in December ( with a peak in November ) . There are few flying in January and February and then the autumn ...
... flight data for Lincoln for eight years from 1959 to 1966. This has shown that the spring aphid flights begin in September and end in December ( with a peak in November ) . There are few flying in January and February and then the autumn ...
Page 237
EFFECTIVENESS OF CONTROL METHODS RECURRING FLIGHTS The first aphid flights on lower country may occur as early as the end of September but may start considerably later in cold , wet springs . Once flights commence , they are recurring ...
EFFECTIVENESS OF CONTROL METHODS RECURRING FLIGHTS The first aphid flights on lower country may occur as early as the end of September but may start considerably later in cold , wet springs . Once flights commence , they are recurring ...
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