Toxicity of Various Compounds as Fumigants to Eggs and Larvae of the Oriental Fruit Fly1

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Abstract
Fifty-three compounds and mixtures were tested against Dacus dorsalis in 5-gal. friction-top tins using naked eggs and 3d_instar larvae. LD50 and LD95 values were determined. A differential effect between eggs and larvae was apparent with some compounds. Materials extremely toxic to both stages were chloroacetonitrile, methyl iodide, methyl thiocyanate, l-bromo-2-chloroethane, ethylene dibromide, acrylonitrile, chlorobromopropene, 1,3-dichloropropene and the ethyl ester of chloroacetic acid. As a rule older eggs were more resistant to fumigation than younger eggs.

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