Knowledge Center Catalog

Diversity in Cotesia Sesamiae (Hymenoptera: Braconidae) larval parasitoids of african Stemborers

By: Contributor(s): Material type: TextTextPublication details: Addis Ababa (Ethiopia) CIMMYT|EARO : 1999Description: p. 109-112ISBN:
  • 92-9146-065-6
Subject(s): DDC classification:
  • 633.15 EAS No. 6
Summary: 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.
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Item type Current library Collection Call number Copy number Status Date due Barcode Item holds
Conference proceedings CIMMYT Knowledge Center: John Woolston Library CIMMYT Publications Collection 633.15 EAS No. 6 (Browse shelf(Opens below)) 1 Available X649283
Total holds: 0

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.

English

0103|AL-Maize Program|AGRIS 0102|AJ

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