Proceedings of the New Zealand Weed and Pest Control Conference1985 - Pesticides |
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Page 33
... populations in excess of 1.65 x 101 / m2 would result for each aphid / m2 at the beginning of the season . The potential exists therefore for severely damaging populations to establish . This study has shown that high populations of ...
... populations in excess of 1.65 x 101 / m2 would result for each aphid / m2 at the beginning of the season . The potential exists therefore for severely damaging populations to establish . This study has shown that high populations of ...
Page 122
... population behaviour . In the undisturbed populations of this study ragworth seedlings appeared to be the principal source of replacement plants . INTRODUCTION Although ragwort is one of the most important weeds of New Zealand pastures ...
... population behaviour . In the undisturbed populations of this study ragworth seedlings appeared to be the principal source of replacement plants . INTRODUCTION Although ragwort is one of the most important weeds of New Zealand pastures ...
Page 125
... populations in September of each year died before flowering and none flowered as annuals . An average of 11 % of seedling plants which entered the populations in 1975 and 1976 at sites 1 and 2 and in 1976 at site 3 flowered in their ...
... populations in September of each year died before flowering and none flowered as annuals . An average of 11 % of seedling plants which entered the populations in 1975 and 1976 at sites 1 and 2 and in 1976 at site 3 flowered in their ...
Contents
Author Index | 8 |
Annual Report | 14 |
Differences in susceptibility of grass grub in Taranaki to organophosphate | 27 |
Copyright | |
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38th N.Z. Weed adults alachlor aphid apple application assessed Auckland autumn barley bioassay blueberries bushes chemical chlormethazole chlorpyrifos Christchurch clopyralid crop cultivars cypermethrin daisy damage daminozide diazinon DSIR effect fensulfothion fertiliser field trials flowering fruit fungicide gave glyphosate gorse greedy scale growers growth Hamilton harvest herbicides hexazinone infested insect insecticides kg ai/ha kill kiwifruit larvae leafroller levels Lincoln lindane litres litres/ha loam loliae lolitrem lucerne metsulfuron-methyl mites miticides mortality nematodes numbers oxadiazon oxyfluorfen P.O. Box Palmerston North pasture peach seedlings pellets Pest Control Conf phylloxera picloram plants plots populations porina post-emergence Private Proc pruning ragwort rates reduced replicates residual rhizome root Ruakura ryegrass samples season seed treatment significant significantly simazine soil species spray St John's wort stem weevil sward Table terbufos tested thistle tiller treated triadimenol trifluralin unsprayed untreated vines Waikato Weed and Pest weed control white clover yield Zealand