Proceedings of the New Zealand Weed and Pest Control Conference1976 - Pesticides |
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Page 125
... growth . Phosphorus levels used in these experiments varied between 50 and 1000 parts per million by weight of oven - dry soil ( ppmw ) and the rates of atrazine ( in the top soil ) were 0.15 , 0.20 , and 0.25 ppmw . The herbicide ...
... growth . Phosphorus levels used in these experiments varied between 50 and 1000 parts per million by weight of oven - dry soil ( ppmw ) and the rates of atrazine ( in the top soil ) were 0.15 , 0.20 , and 0.25 ppmw . The herbicide ...
Page 153
... growth stage measurement and on the final day , when plants were cut at soil level , oven dried and weighed . Aphid Numbers RESULTS AND DISCUSSION Initially aphid numbers increased according to the plant size , and 23 days after the ...
... growth stage measurement and on the final day , when plants were cut at soil level , oven dried and weighed . Aphid Numbers RESULTS AND DISCUSSION Initially aphid numbers increased according to the plant size , and 23 days after the ...
Page 154
... growth stages for varying lengths of time and at high and low rates . Growth stage when aphids applied Number of days of in- Lucerne growth Height of Number of lucerne surviving festation stage plants ( day 19 ) ( day 19 ) ( day 23 ) ...
... growth stages for varying lengths of time and at high and low rates . Growth stage when aphids applied Number of days of in- Lucerne growth Height of Number of lucerne surviving festation stage plants ( day 19 ) ( day 19 ) ( day 23 ) ...
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