Yearbook of Agriculture

acre adult aerosol Agriculture alfalfa animals aphids applied areas arsenate attack bait boll bollworm borer breeding bugs Bureau of Entomology California cattle cause chemical chlordane citrus corn cotton crops damage dieldrin disease dosage dust effective eggs emulsion Entomology and Plant feed field flies flowers fruit fumigation grain grasshoppers growers grubs hatch honey bees host house flies important inches infested injury insect pests insecticides Japanese beetle kill laboratory large numbers larvae lead arsenate leaf leafhopper lice lindane livestock mate material ment methods methoxychlor methyl bromide mites mosquitoes moth nest parasites parathion peas percent Plant Quarantine poison pollen potato pounds psyllid Quarantine residues resistant scale insects season secticides sects seed soil species specimens spores spray sprayers spread stage studies temperature tests ticks tion toxaphene toxic treated treatment trees trol usually varieties velopment virus weed weevil wings worms