Sources and Mechanisms of Resistance to Sorghum Head Bug, Eurystylus-Immaculatus Odh in West-Africa

    Sharma, H C and Doumbia, Y O and Haidara, M and Scheuring, J F and Ramaiah, K V and Benenati, N F (1994) Sources and Mechanisms of Resistance to Sorghum Head Bug, Eurystylus-Immaculatus Odh in West-Africa. Insect Science and its Application, 15 (1). pp. 39-48. ISSN 0191-9040

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    Abstract

    Sorghum is one of the most important cereal crops in West Africa, and the head bug, Eurystylus immaculatus Odh. (Hemiptera: Miridae) is the key pest of grain sorghum in this region. A range of sorghum genotypes were evaluated for resistance to sorghum head bug at Sotuba (Mali) and Kamboinse (Burkina Faso). Genotypes CSM 388, IS 14332, Malisor 84-7, Sakoika. S 29 and Kamboinse local were resistant to head bugs. both under natural and headcage screening. Head bug resistant genotypes had a lower percentage of head bug damaged grain. The food quality of head bug damaged grain was very poor and unacceptable. Cultivar non-preference was identified as a component of resistance to head bugs. and CSM 388 was nonpreferred compared to E 35-1. Panicle compactness was positively associated with head bug numbers and grain damage. However, genotypes with loose panicles were also susceptible to bugs. Long glumes (>5 mm), days to glume opening (>20 days after anthesis), >50% covering of the grain by the glumes, and grain hardness contribute towards resistance to Eurystylus immaculatus. This information will be useful for developing a programme to breed for resistance to this insect in West Africa.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Sorghum
    Depositing User: Mr Charan Sai Ch
    Date Deposited: 26 Oct 2011 06:53
    Last Modified: 26 Oct 2011 06:53
    URI: http://oar.icrisat.org/id/eprint/2813
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    Projects: UNSPECIFIED
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    Acknowledgement: UNSPECIFIED
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