Crude extracts of five plant species which in previous experiments significantly limited corn wireworm,Melanotus communisGyllenhal, feeding damage were tested for deterrence of the southern corn rootworm,Diabrotica undecimpunctata howardiBarber. When offered extract-treated and untreated corn seeds, rootworms damaged significantly fewer treated seeds than untreated seeds with four of the extracts. In a “no-choice” test design, with the three most effective extracts, there was a significantly lower frequency of damage to treated baits compared to control baits.