Proceedings of the New Zealand Weed and Pest Control Conference1976 - Pesticides |
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Page 59
... suggested that where an initial heavy population contains less than 1 % white cyst nematode it would take four crops ... suggest that resistance of the type used here can be exploited with confidence . ACKNOWLEDGEMENTS I am grateful to ...
... suggested that where an initial heavy population contains less than 1 % white cyst nematode it would take four crops ... suggest that resistance of the type used here can be exploited with confidence . ACKNOWLEDGEMENTS I am grateful to ...
Page 151
... suggest that the state of the host plant may also play an important part . The rapid decline in aphid population was restricted to those plots where the host plants were severely damaged by the BGLA infestation . No explanation is ...
... suggest that the state of the host plant may also play an important part . The rapid decline in aphid population was restricted to those plots where the host plants were severely damaged by the BGLA infestation . No explanation is ...
Page 181
... suggest that sustained aphid levels of above 5 per stem in spring and autumn require spraying if damage is to be avoided . In view of these studies it seems important to control aphids in autumn until flight stops in about mid May so ...
... suggest that sustained aphid levels of above 5 per stem in spring and autumn require spraying if damage is to be avoided . In view of these studies it seems important to control aphids in autumn until flight stops in about mid May so ...
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