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The efficiency of sampling for aphid predators from lucerne
a new grass grub resistant plant
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activity addition adult Agricultural application assessed Auckland bees Canterbury caused Centre chemical collected compared containing cost cover crops damage densities disease DSIR early effect experiment feeding field four fruit fungicides g/ha grass grass grub growth harvest herbicide included increased indicate infection infection periods insecticides intervals kg/ha laboratory larvae late leaf leaves less levels lime sulphur Lincoln mean measured METHODS metiram mites mortality N.Z. Weed North occurred P.O. Box pasture Pest Control Conf pesticide plants plots populations powdery mildew present Private Proc production programme protectant pyri range rates recommended recorded reduced REFERENCES reported Research residues resistance sampling scale season seed showed shown significant significantly similar soil species spray stage surface Table tested thistle toxicity treated treatment tree trial untreated Weed and Pest weeks weevil weight yield Zealand