Proceedings of the New Zealand Weed and Pest Control Conference1976 - Pesticides |
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Page 196
... damaged tillers in November and a 60 % reduction in December with a subsequent 17 % increase in tiller density . This rather poor level of tiller damage control may have stemmed from the rapid re - infesta- tion from untreated areas ...
... damaged tillers in November and a 60 % reduction in December with a subsequent 17 % increase in tiller density . This rather poor level of tiller damage control may have stemmed from the rapid re - infesta- tion from untreated areas ...
Page 90
... damage . The spatial distribution of most insect populations is highly aggregated , hence damage to a crop is often patchy , with large areas suffering little or no damage and other areas suffering severe damage . This was the case in ...
... damage . The spatial distribution of most insect populations is highly aggregated , hence damage to a crop is often patchy , with large areas suffering little or no damage and other areas suffering severe damage . This was the case in ...
Page 94
... damage to the seed coat after germination which did not affect the seedling . Wireworms also caused a low level of damage , chewing 3-4 % of the seedlings at the plant base and feeding on the seed of 7-12 % of apparently healthy ...
... damage to the seed coat after germination which did not affect the seedling . Wireworms also caused a low level of damage , chewing 3-4 % of the seedlings at the plant base and feeding on the seed of 7-12 % of apparently healthy ...
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