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Control of barley yellow dwarf virus BYDV disease of barley in mid
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40th N.Z. Weed activity adult apple application asparagus assessed beds block Canterbury caused chemical clopyralid compared concentration cover crop cultivars damage determined diameter disease early effect eggs emergence established experiments field flower four fruit fungicides glyphosate grass growth harvest herbicides higher important increased indicated infection insecticides kg ai/ha larvae leaf leaves less levels Lincoln lucerne mean measured mefluidide METHODS mite mortality numbers occurred P.O. Box pasture period persimilis Pest Control Conf pesticide plants plots population present Private Proc production rates recorded reduced REFERENCES reported Research resistance response samples scale season seed seedlings showed shown significant significantly similar soil species spray spring stages surface Table temperature thistle thrips tiller tolerance toxicity treated treatment trees trial untreated Weed and Pest weed control weeks weevil winter yield Zealand