... the effectiveness of insect biological control agentsby synergizing the interactions between insect- resistant barley, maize, sorghum, and wheat, and the parasitoids of insect pests attacking these ... 25, 1344–1353, 19 96. Singh, D. P. Breeding for Resistance to Diseases and Insect Pests. Springer-Verlag, NewYork, 19 86, p. 222.Singh, P., and R. F. Moore., Eds., Handbook of Insect Rearing. Vol. ... the effects of plant resistance factors on biological control agents. Their results suggested that a better understanding of theevolution of crop plants, pests, and pest biological control agents...