Wildlife Damage Management, Internet Center for


Date of this Version



Proceedings Ninth Bird Control Seminar, Bowling Green State University, Bowling Green, Ohio, October 4-6, 1983. Ed. William B. Jackson and Beth Jackson Dodd


Copyright (c) 1983 Michael L. Avery and Mark E. Tobin


Individually caged House Finches (Carpodacus mexicanus) were tested to determine if exposure to methiocarb applied to one type of food would enhance the repellent effect of the chemical when it was subsequently encountered on a different food type. Initially, 24 adult finches were each offered two grape bunches during a series of 2-h feeding trials. Birds exposed to one treated bunch and one untreated bunch ate significantly less (p < 0.05) grapes than did birds given two untreated bunches. One week later, the same group of birds was tested in a similar manner using treated and untreated safflower seeds. Among the finches exposes to treated seeds, we found no significant (p > 0.05) differences in consumption between those that had previously experienced methiocarb-treated grapes and those with no prior methiocarb experience. This finding implies that in areas where more than one type of crop is exposed to the same populations of depredating birds, previous exposure to methiocarb on one crop will not affect the birds' subsequent response to methiocarb encountered on a second crop.