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INTEGRATED PEST MANAGEMENT AN INTRODUCTION
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aphids areas aster leafhopper aster yellows BLIGHT-ALERT Botrytis leaf blight Botrytis squamosa calculator cause CHAPTER chemical control common cone traps cull piles cutworm cycle and biology develop DINOV Disease cycle downy mildew effective eggs ﬂower ﬂy foliar forecasting fungi fungicide fungicide application fungus germinate ground beetles growers harvest herbicides Infected bulbs inoculum production index insect pests insecticide INTEGRATED PEST MANAGEMENT larvae leafhoppers Management Cultural MANAGEMENT FOR ONIONS mature Michigan mineral soils mites muck soils natural enemies nematodes nutsedge nymphs and adults onion bulbs onion fields onion leaves onion maggot onion maggot ﬂies onion plants onion thrips onions grown Ontario outbreaks overwinter parasitoids pathogen pesticide pests of onions predators produce pupae ragweed reduce relative humidity resistance root rotation rove beetle sclerotia scouting season seedlings senesce sequential sampling species spores sporulation spray storage symptoms temperature threshold tion tissue volunteer onions wasps weather weeds windbreaks York