Behaviorial and Toxicological Studies of the Drywood Termite, Cryptotermes Brevis (Walker) (Kalotermitidae: Isoptera)

摘要

Studies were conducted from 1968 through 1970 on colony life, swarming behavior, wood preference, effect of humidity on behavior, and on effects of the insecticides dieldrin, silica aerogel, dichlorovos and sulfuryl fluoride in control of drywood termite Cryptotermes brevis (Walker). Preference order of woods was balsa, fir, cedar, and pine. Constant exposure to residues of dieldrin eliminated all individuals in 14 hours when spray concentrations were as low as 0.25%. Effective control concentrations should be at least or above 1%. Silica aerogel acts as an effective barrier against C. brevis when the insect is exposed for 15- and 20-minute periods to as little as 0.3 cc per 51.24 sq. cm. Complete mortality was accomplished with 1 1/2 hours at these times and concentrations. Dichlorovos would eliminate exposed soldiers, reproductives and workers when fumigated at twice the recommended dosage or 50 sq. in. per 1000 cu f. Sulfuryl fluoride, when used at 8 ounces 1000 cu f., produced effective kill of C. brevis workers placed in plugged 2 x 4 inch blocks. (Author)