TY  - PRO
AU  - Ngi-Song,A.J.
AU  - CIMMYT
AU  - Massamba,N.N.
AU  - Omwewa,CH
AU  - Overholt,W.A.
AU  - Stouthamer,R.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
TI  - Diversity in Cotesia Sesamiae (Hymenoptera:  Braconidae) larval parasitoids of african Stemborers
SN  - 92-9146-065-6
U1  - 633.15 
PY  - 1999///
CY  - Addis Ababa (Ethiopia)
PB  - CIMMYT|EARO
KW  - Biological control
KW  - Busseola fusca
KW  - Chilo partellus
KW  - Cotesia
KW  - Encapsulation
KW  - Insulation
KW  - Kenya
KW  - Sesamia calamistis
KW  - CIMMYT
N2  - Cotesia sesamiae (Cameron) is the most common larval parasitoid of African stemborers on Graminae. Its major hosts include Chilo partelus (Swinhoe), Busseola fusca Fuller and Sesamia calamistis Hampson. A survey was conducted in Kenya along a transect from west to east to collect C. sesamiae populations. These various geographic populations were evaluated in tbe laboratory. It was observed that certain populations of C. sesamiae were different in their ability to successfully parasitize B. fusca. The population from the west successfully developed in B. fusca while the population from the east, in the coastal region, was encapsulated. The two populations where partially reproductively isolated. PCR analysis also revealed that only one of these populations harbored a symbiotic bacteria, Wolbachia sp. that causes a unidirectional incompatibility which has been observed in several group of insects. Implications of these findings for introduction of biological control are discussed
ER  -