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be sprayed with three different chemical agents. The bulk will be treated with Bt (Bacillus tkuringienses), a bacterial disease which interferes with the caterpillars’ digestive systems after they eat treated leaves.
Another 640 acres will be treated with Dimilin, a chemical pesticide which is more effective than Bt but is not specific to gypsy moths. It is not generally recommended for use near water, since it kills insects other than gypsy moths and may interfere with the food supply of fish.
See SPRAY, p. 18
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