Proceedings of the New Zealand Weed and Pest Control Conference1988 - Pesticides |
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Page 103
ECONOMICS OF USING A GROOVED ROLLER FOR CONTROL OF GRASS GRUB IN SOUTHLAND R.F. VAN TOOR Ministry of Agriculture and Fisheries Invermay Agricultural Centre , Private Bag , Mosgiel SUMMARY Results from ... grass grub in Southland R F van Toor.
ECONOMICS OF USING A GROOVED ROLLER FOR CONTROL OF GRASS GRUB IN SOUTHLAND R.F. VAN TOOR Ministry of Agriculture and Fisheries Invermay Agricultural Centre , Private Bag , Mosgiel SUMMARY Results from ... grass grub in Southland R F van Toor.
Page 106
... grass grub density thresholds calculated by this formula for four control options are given in Table 1 and show that at a medium level of grass grub infestation , rolling by contract or cost sharing of the roller produces economic ...
... grass grub density thresholds calculated by this formula for four control options are given in Table 1 and show that at a medium level of grass grub infestation , rolling by contract or cost sharing of the roller produces economic ...
Page 108
... grass grub in seven trials at four locations throughout Canterbury . The bacteria were successfully established in the soil and disease levels averaging 20 % were recorded in May , resulting in a 55 % reduction in prepupal larvae and ...
... grass grub in seven trials at four locations throughout Canterbury . The bacteria were successfully established in the soil and disease levels averaging 20 % were recorded in May , resulting in a 55 % reduction in prepupal larvae and ...
Contents
Author Index | 9 |
Address by Sir David Beattie to 40th Annual Conference | 15 |
CEREALS | 21 |
Copyright | |
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41st N.Z. Weed activity alligator weed aphid application asparagus assessed Auckland barley bioassay BYDV Canterbury cereals chemical clethodim crop cultivars cyproconazole damage diclofop-methyl disease DSIR effect eggs field flowering fluazifop-butyl fluvalinate foliage fruit fungicides g/ha glyphosate gorse grass grub grass weeds growers Hamilton clay loam herbicides Horotiu sandy loam infection insecticide kg/ha kiwifruit larvae leaf litres/ha loam soil MCPA mite miticides mulch myclobutanil nodding thistle NZ Weed orchards P.O. Box paclobutrazol Palmerston North pasture pendimethalin Pest Control Conf picloram pirimicarb plants plots Popay populations Proc programme propargite propiconazole Pukekohe quizalofop regrowth replicates Research residues resistance rosettes Ruakura ryegrass samples seed seedlings sethoxydim shoot significantly Silwet L-77 simazine spray surfactant susceptible Table temperature tested thrips tillers tip rot translocation treated treatment trees trial triasulfuron untreated uptake Weed and Pest weed control weeks yield Zealand