Development of Crop Resistance to Insects
1972
Sprague, G. F. | Dahms, R. G.
The development of host resistance to insect pests offers promise of reducing yield losses as well as a material reduction in the use of insecticides. A review of progress and the current situation is presented for selected insect pests, Hessian fly (Mayetiola destructor), European corn borer (Ostrinia nubilalis), boll weevil (Anthonomus grandis), corn earworm and cotton bollworm (Heliothis zea), pea aphid (Acyrthosiphon pisum), spotted alfalfa aphid (Therioaphis maculata), potato leaf hopper (Empoasea fabae), and the alfalfa weevil (Hypera postica). With the exception of the Hessian fly the only feasible control for this group of insects, prior to the development of resistant types, has been through use of chemicals. Marked progress has been achieved in developing commercially useful host-resistance to this group of insects with the exception of the cotton bollworm and boll weevil. Even here types differing in various components of resistance have been identified but the combination of these characteristics into an acceptable commercial variety remains to be accomplished. Increased emphasis is being placed on host-plant resistance. Success in such efforts requires the close cooperation of entomologists, geneticists, and breeders.
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