Abstract
Biological control ofstalkboring Lepidoptera often has beensuccessful when the braconid parasitoids in thegenera Cotesia and Apanteles werethe natural enemies of choice. Constraints inusing these gregarious, koinobiont,endoparasitoids have included host suitability,especially as influenced by the host's immuneresponse. The suitability of a novel host, theNew World stalkborer Diatraeaconsiderata (Lepidoptera:Pyralidae), for parasitization by three OldWorld braconids, Cotesia chilonis, C. flavipes and C. sesamiae (Hymenoptera: Braconidae), wascompared to the suitability of another NewWorld novel host, Diatraea saccharalis. D. considerata was less suitable for allthree parasitoids than was D.saccharalis. The frequent occurrence ofparasitized D. considerata larvae thatdid not yield parasitoids, or pupate within anappropriate time interval, suggestedencapsulation of the parasitoid progeny, whichwas visible through the host cuticle. Giventhe suitability results, these threeparasitoids would not be appropriate candidatesfor use against D. considerata. Theresults also have important implications forthe narrow host range expressed by theseparasitoids.
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Wiedenmann, R.N., Smith, J. & Rodriguez-del-Bosque, L.A. Host suitability of the New World stalkborer Diatraea considerata for three Old World Cotesia parasitoids. BioControl 48, 659–669 (2003). https://doi.org/10.1023/A:1026368013414
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DOI: https://doi.org/10.1023/A:1026368013414