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Helicopter spraying of nodding thistle with two rates of water
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activity adult Agricultural aphid appeared application assessed beetle block caused chemical clover compared crop damage DISCUSSION disease early effect established evaluation experiment farms field field crickets flowering four fruit gave glyphosate gorse grass grub grazing growth harvest herbicides higher increase infection insecticide kg/ha kiwifruit larvae leaf less levels lucerne mean measured method mortality N.Z. Weed North numbers occurred P.O. Box paddocks paraquat pasture period permethrin Pest Control Conf plants plots populations present Proc production programme rates recorded reduced replicates reported Research residues resistant root ryegrass samples season seed seedlings showed shown significant significantly similar soil soldier fly species spray spring stage stem studies summer Table technique tested thistles tolerance treated treatments tree trial untreated Weed and Pest weed control weeks weight wild oat winter yield Zealand