Proceedings of the New Zealand Weed and Pest Control Conference1976 - Pesticides |
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Page 166
... WEEVIL POPULATIONS UNDER THREE PLANT SPECIES AT OTAKANINI TABLE 1 : Plant species Numbers / m2 ± standard error December 1974 June 1975 December 1975 white clover 11 ± 3 761 +55 lucerne 8 + 2 281 +26 paspalum 32 31 ± 5 308 ± 20 139 13 ...
... WEEVIL POPULATIONS UNDER THREE PLANT SPECIES AT OTAKANINI TABLE 1 : Plant species Numbers / m2 ± standard error December 1974 June 1975 December 1975 white clover 11 ± 3 761 +55 lucerne 8 + 2 281 +26 paspalum 32 31 ± 5 308 ± 20 139 13 ...
Page 46
... weevil population by 94 % , compared to a 98 % reduction by a January to April fallow . Thorough cultivation prior ... weevil . INTRODUCTION White - fringed weevil adults have much greater longevity and fecundity when fed on legumes than ...
... weevil population by 94 % , compared to a 98 % reduction by a January to April fallow . Thorough cultivation prior ... weevil . INTRODUCTION White - fringed weevil adults have much greater longevity and fecundity when fed on legumes than ...
Page 94
... weevil larvae on emergence , growth and survival of maize seedlings was slight . Average seedling emergence was 93 % of the seeds sown with white - fringed weevil causing on average 1 % emergence failure in the three treatments ...
... weevil larvae on emergence , growth and survival of maize seedlings was slight . Average seedling emergence was 93 % of the seeds sown with white - fringed weevil causing on average 1 % emergence failure in the three treatments ...
Contents
Chairmans summary | 1 |
Notillage establishment of lucerne G C Atkinson | 9 |
Insects affecting lucerne seed production | 19 |
Copyright | |
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Common terms and phrases
29th N.Z. Weed activity adults Agric Agricultural Research Centre alachlor aphid application areas assessed asulam atrazine Auckland autumn azinphos-methyl barley grass benomyl BGLA black beetle blue-green lucerne aphid brassicas Canterbury carbofuran chemical chlorpyrifos Christchurch crop cultivars cypermethrin damage diflubenzuron disease DSIR effect emergence ethofumesate fensulfothion field trials foliage fungicides germination gorse granules grass grub growth Hamilton harvest herbicides increased insect insecticides isazophos kg/ha larvae leaf legumes Lincoln linuron litres/ha lucerne lucerne yield maize method mite nematode North Island numbers oats P.O. Box Palmerston North paraquat pasture Pest Control Conf phorate picloram plants plots population post-emergence Proc pyri rates reduced replicates residual resistant Ruakura Ruakura Agricultural Research ryegrass samples season seed seedlings significant significantly soil sowing sown species spray sprayer spring stage summer Table tested treatments triclopyr untreated Weed and Pest weed control weeks weevil Wellington white clover white-fringed weevil Zealand