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What insecticide is used in the DCNR spray program?

April 26, 2017dcnr INSECTICIDE program spray Used

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What insecticide is used in the DCNR spray program?

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DCNR contracts for the use of a biological control insecticide, commonly called Bt (Bacillus thuringiensis var. kurstaki). The commercial name is FORAY 76B. Bt is a bacteria that is sprayed on the tree’s foliage. The bacteria remains effective for 7 to 10 days. Caterpillars ingest the bacteria when they feed on the foliage. The bacteria can take several days to take effect. Not all caterpillars die as a result of spraying. Bt can only affect certain leaf-eating caterpillars that are in the larval stage at the time of spraying. Bt is sprayed at a rate of one-half gallon per acre and is not mixed with any other chemicals or any other material.