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Developing new methods of insect control
Biological control 7
Pesticides and aquatic environments
3 other sections not shown
affecting insect abundance amount of DDD aphids approach aquatic areas Arthropods balance Biological Control biological methods biotic California Canada chemical control chemical pesticides cides Clear Lake codling moth complex compounds Connecticut Dr Conservation Foundation control methods control programs costs and benefits crop D. C. Dr DDD Applications DDT-resistance density Dept developed dieldrin discussion disease ecological lines Economic Entomology ecosystem effects of pesticides effects on wildlife environmental field fish and wildlife flesh samples fluctuations forest spraying fungicides grebes habitat heptachlor houseflies human health insect control insecticides instance Knipling largemouth bass major mites natural control factors needed OP-resistance operation orchards organisms oystershell scale parasites parathion pest control pest populations pest species pest treatment pesti pesticide effects pesticide-wildlife pesticides on wildlife physical factors phytophagous plankton plant predators problems recommend Sacramento blackfish scientists sponsored spruce budworm Steinhaus studies Tarzwell testing tion toxic U.S. Department U.S. Fish University white catfish