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Response of comercial varieties and other genotypes of maize for resistance to the maize weevil (Sitophilus zeamais Motsch.) (Coleoptera: curculionidae)

By: Kitaw, D | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Kenya | 7. Proceedings of the Eastern and Southern Africa Regional Maize Conference Nairobi (Kenya) 5-11 Feb 2002.
Contributor(s): Eticha, F [coaut.] | Friesen, D.K.|Palmer, A.F.E [eds.] | Tedesse, A [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Nairobi (Kenya) KARI|CIMMYT : 2002Description: p. 92-101.ISBN: 970-648-120-6.Subject(s): Agricultural economics | Coleoptera | Curculionidae | Genetic resistance | Maize | Sitophilus zeamais | Varieties | CIMMYT | KARI | Zea mays AGROVOC | Hybrids AGROVOC | Plant breeding AGROVOCDDC classification: 338.16 Summary: Commercial varieties and various maize genotypes including hybrids, composites and lines at different breeding stages obtained from CIMMYT and local sources (Bako and Melkassa Agricultural Research Centres) were evaluated for resistance to Sitophilus weevils in no choice tests in the laboratory at the Bako Agricultural Research Center, western Ethiopia, between 1996-1998. One hundred grams of maize grain were infested with 20 unsexed and approximately equal age weevils in a glass jar with a ventilated lid. The experiment was laid out in a completely randomized design with three replications except for the 1998 experiment, which was not replicated. Inspection for progeny emergence count was started a day immediately after the first progeny emergence was observed and continued until all progeny weeyils bad emerged. The number of progeny weevils emerged (F J, percentages of grain damaged and weight losses, and an index of susceptibility were the parameters considered for evaluation. Most of tbe commercial varieties of maize were found susceptible, and several of the genotypes including Abo Bako, Across 87-Tz-VT-W, AW 8047, Golden Valley, JCML-]96-xJM-] etc., were identified to be relatively resistant to the maize weevil. The promising genotypes should be promoted to further tests in a more refined way in order to get better weevil resistant germplasm.Collection: CIMMYT Publications Collection
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Item type Current location Collection Call number Copy number Status Date due Barcode Item holds
Book CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 338.16 FRI (Browse shelf) 1 Available G630188
Total holds: 0

Commercial varieties and various maize genotypes including hybrids, composites and lines at different breeding stages obtained from CIMMYT and local sources (Bako and Melkassa Agricultural Research Centres) were evaluated for resistance to Sitophilus weevils in no choice tests in the laboratory at the Bako Agricultural Research Center, western Ethiopia, between 1996-1998. One hundred grams of maize grain were infested with 20 unsexed and approximately equal age weevils in a glass jar with a ventilated lid. The experiment was laid out in a completely randomized design with three replications except for the 1998 experiment, which was not replicated. Inspection for progeny emergence count was started a day immediately after the first progeny emergence was observed and continued until all progeny weeyils bad emerged. The number of progeny weevils emerged (F J, percentages of grain damaged and weight losses, and an index of susceptibility were the parameters considered for evaluation. Most of tbe commercial varieties of maize were found susceptible, and several of the genotypes including Abo Bako, Across 87-Tz-VT-W, AW 8047, Golden Valley, JCML-]96-xJM-] etc., were identified to be relatively resistant to the maize weevil. The promising genotypes should be promoted to further tests in a more refined way in order to get better weevil resistant germplasm.

English

0409|AGRIS 0401|AL-Maize Program

Juan Carlos Mendieta

CIMMYT Publications Collection

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