Proceedings of the New Zealand Weed and Pest Control Conference1981 - Pesticides |
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Page 123
... aphid ( Acyrthosiphon kondi ) limit the efficiency of the parasite . Predators of aphids , while slow to respond to the peaks in aphid population may exert some control in summer . INTRODUCTION Lucerne aphid parasites of the Aphidius ...
... aphid ( Acyrthosiphon kondi ) limit the efficiency of the parasite . Predators of aphids , while slow to respond to the peaks in aphid population may exert some control in summer . INTRODUCTION Lucerne aphid parasites of the Aphidius ...
Page 25
... aphid survival . This operation successfully slowed the rate of spread of the aphid . Aphids survived over winter on spotted bur medick ( Medicago arabica ) in the Auckland area . In summer 1982/83 , aphids were seen on traps south of ...
... aphid survival . This operation successfully slowed the rate of spread of the aphid . Aphids survived over winter on spotted bur medick ( Medicago arabica ) in the Auckland area . In summer 1982/83 , aphids were seen on traps south of ...
Page 276
... aphid threshold density used . INTRODUCTION The cosmopolitan rose - grain aphid ( Metopolophium dirhodum ) appeared in New Zealand in 1982 , and Canterbury cereal crops supported dense populations of 50-150 aphids / tiller by December ...
... aphid threshold density used . INTRODUCTION The cosmopolitan rose - grain aphid ( Metopolophium dirhodum ) appeared in New Zealand in 1982 , and Canterbury cereal crops supported dense populations of 50-150 aphids / tiller by December ...
Contents
A relationship between seed yield of white clover and density of yarrow G | 5 |
Fungicide seed treatment to improve establishment of ryegrasses and other | |
Weed control in lentils J H B Butler and W A Jermyn | 3 |
Copyright | |
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35th N.Z. Weed adult Agric aphid application Argentine stem weevil asparagus assessed atrazine Auckland bait barley beetle Canterbury chemical chlorpyrifos Christchurch crop cultivars damage density diazinon diquat disease diuron DSIR effect endophyte EPTC ester fensulfothion field trials foliar formulation fungicide g/ha gave germination glyphosate gorse grass grub grazing growth Hamilton harvest herbicides hexazinone infection insecticide kg ai/ha kg/ha kiwifruit larvae leaf levels lindane linuron litres/ha loam lucerne MCPA METHODS nematodes nodding thistle numbers oxamyl P.O. Box paddocks Palmerston North paraquat pasture permethrin Pest Control Conf picloram plants plots populations porina post-emergence Proc prochloraz production programme pyrethroids ragwort reduced regrowth replicates residues Ruakura ryegrass samples season seed treatment seedlings significant significantly simazine slug soil sown species spray stage stripe rust Table tamarillo tested triadimefon triclopyr untreated Weed and Pest weed control weeks wheat white clover yield Zealand