TY - JOUR
T1 - Development of the braconid wasp Cotesia flavipes in two Crambids, Diatraea saccharalis and Eoreuma loftini
T2 - Evidence of host developmental disruption
AU - Mahmoud, A. M.A.
AU - De Luna-Santillana, E. J.
AU - Guo, X.
AU - Reyes-Villanueva, F.
AU - Rodríguez-Pérez, Mario A.
N1 - Funding Information:
We thank Secretaria de Investigación y Posgrado del Instituto Politécnico Nacional for financial support (Grant No. 20101198 ). Mario A. Rodríguez-Pérez holds a scholarship from Comisión de Operación y Fomento de Actividades Académicas of Instituto Politécnico Nacional (IPN). Ali Mohammed holds a doctoral scholarship from Consejo Nacional de Ciencia y Tecnología — México (CONACYT). We also acknowledge Centro de Biotecnología Genómica and Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (Unidad Altamira) of IPN. We thank the two reviewers for the English corrections of the manuscript. Ali Mohammed is also grateful to Esraa Gamal for her support and encouragement.
PY - 2012/3
Y1 - 2012/3
N2 - Cotesia flavipes is an important gregarious larval endoparasitoid of several crambid stem borers, including Diatraea saccharalis. The suitability of two crambid species, Eoreuma loftini and D. saccharalis, pests of sugarcane and rice in Texas, for C. flavipes development was tested. The effect of parasitization by C. flavipes on encapsulation response was assessed in vivo in both D. saccharalis and E. loftini. The results indicated that the parasitoid developed and emerged successfully in D. saccharalis larvae. Although E. loftini larvae were readily parasitized by C. flavipes parasitoids, no wasp larvae hatched from the eggs in this host because eggs were encapsulated by the host's hemocytes. The developmental fate of the E. loftini larvae with encapsulated parasitoids was variable. Most died as abnormal fifth instars or as post-wandering prepupae, while a few developed normally to the pupal stage. In vivo experiments, there was a significant reduction in the percent of beads encapsulated in parasitized larvae in both hosts. However, the percent of beads showing melanization decreased significantly in parasitized D. saccharalis larvae but did not differ significantly in parasitized or unparasitized E. loftini larvae. Our results showed that D. saccharalis is a suitable host for C. flavipes whereas E. loftini is an unsuitable host. This study indicated that lepidopteran stem borers that are taxonomically, behaviorally, and ecologically very similar can differ in their ability to encapsulate a parasitoid species.
AB - Cotesia flavipes is an important gregarious larval endoparasitoid of several crambid stem borers, including Diatraea saccharalis. The suitability of two crambid species, Eoreuma loftini and D. saccharalis, pests of sugarcane and rice in Texas, for C. flavipes development was tested. The effect of parasitization by C. flavipes on encapsulation response was assessed in vivo in both D. saccharalis and E. loftini. The results indicated that the parasitoid developed and emerged successfully in D. saccharalis larvae. Although E. loftini larvae were readily parasitized by C. flavipes parasitoids, no wasp larvae hatched from the eggs in this host because eggs were encapsulated by the host's hemocytes. The developmental fate of the E. loftini larvae with encapsulated parasitoids was variable. Most died as abnormal fifth instars or as post-wandering prepupae, while a few developed normally to the pupal stage. In vivo experiments, there was a significant reduction in the percent of beads encapsulated in parasitized larvae in both hosts. However, the percent of beads showing melanization decreased significantly in parasitized D. saccharalis larvae but did not differ significantly in parasitized or unparasitized E. loftini larvae. Our results showed that D. saccharalis is a suitable host for C. flavipes whereas E. loftini is an unsuitable host. This study indicated that lepidopteran stem borers that are taxonomically, behaviorally, and ecologically very similar can differ in their ability to encapsulate a parasitoid species.
KW - Diatraea saccharalis
KW - Encapsulation
KW - Mexican rice borer
KW - Parasitism
KW - Permissive and non-permissive hosts
KW - Polydnavirus
UR - http://www.scopus.com/inward/record.url?scp=80053372156&partnerID=8YFLogxK
U2 - 10.1016/j.aspen.2011.07.007
DO - 10.1016/j.aspen.2011.07.007
M3 - Artículo
SN - 1226-8615
VL - 15
SP - 63
EP - 68
JO - Journal of Asia-Pacific Entomology
JF - Journal of Asia-Pacific Entomology
IS - 1
ER -