Tri-trophic effect on predator feeding: consumption by the carabid Harpalus affinis of Heliothis armigera caterpillars fed on proteinase inhibitor-containing diet
During the breeding of our major crop plants for high yield and edibility, several desirable traits, including resistance to pest insects, have been lost (Gatehouse et al., 1991). Genetic engineering is now vigorously seeking to reinsert such genes into crop plants, making them toxic or less palatable for herbivorous pests. One class of inhibitors under study are protease/proteinase inhibitors. Th