Proceedings of the New Zealand Weed and Pest Control Conference1976 - Pesticides |
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Page 52
in a uence of plot spraying operations. The larger tank is more ... pressure of 200
kPa a spray volume of 350 litres/ha is obtained. ... A rotary power harrow is often
used to incorporate herbicides shallowly into the soil immediately after spraying.
in a uence of plot spraying operations. The larger tank is more ... pressure of 200
kPa a spray volume of 350 litres/ha is obtained. ... A rotary power harrow is often
used to incorporate herbicides shallowly into the soil immediately after spraying.
Page 55
After the spray had dried , 20-30 leaves were taken at random from the top and
sides of , and from inside , the vine canopy , packed separately between sheets
of paper , and taken to a dark room . The deposits were viewed under short -
range ...
After the spray had dried , 20-30 leaves were taken at random from the top and
sides of , and from inside , the vine canopy , packed separately between sheets
of paper , and taken to a dark room . The deposits were viewed under short -
range ...
Page 157
For ideal three - spray treatments , ( 4,7,11,12 ) , the lower rates of both chemicals
were less effective ( P < 0.01 ) than the higher rates . The reduced level of control
achieved with these lower rates indicates that they are close to the lowest ...
For ideal three - spray treatments , ( 4,7,11,12 ) , the lower rates of both chemicals
were less effective ( P < 0.01 ) than the higher rates . The reduced level of control
achieved with these lower rates indicates that they are close to the lowest ...
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Contents
Annual weeds in established lucerne T P Palmer | 5 |
Lucerne insect survey K G Somerfield and P A Burnett | 14 |
Kain M J Esson T V Holland and D S Atkinson | 23 |
Copyright | |
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activity adults Agricultural aphid appeared application areas assessed atrazine autumn barley grass beetle caused chemical clover compared counts crop cultivars damage DISCUSSION disease early effect emergence established experiment field four further gave germination grass grub growth harvest herbicides higher included increase indicate infection insecticide INTRODUCTION kg/ha larvae leaf leaves less lotus lower lucerne maize major material mean measured method months N.Z. Weed North numbers occurred P.O. Box pasture period Pest Control Conf plants plots population present Proc production rates recorded reduced REFERENCES replicates reported Research residual resistant root ryegrass samples season seed seedlings showed shown significant significantly similar soil sowing sown species spray spring stage stem Summary summer Table tested treated treatments trials untreated Weed and Pest weed control weeks weevil weight white clover XXX XXX XXX yield Zealand