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Search for multiple resistance in maize to stem borers under natural infestation in midaltitude intermediate maturity areas in Kenya

By: Gethi, M | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Mihm, J.A [ed.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1997ISBN: 968-6923-79-9.Subject(s): Chilo partellus | Germplasm | Infestation | Kenya | Pest insects | Pest resistance | Stem eating insects | CIMMYT | Zea mays AGROVOC | Hybrids AGROVOCDDC classification: 633.153 Summary: The search for multiple borer resistance in maize, mainly against Chilo partellus (Swinhoe) and Busseola fusca (Fuller), requires routine screening of a large number of germplasm sources. In the present investigation, the search for multiple borer resistance involved evaluation of inbreds, (local and exotic) synthetics, open pollinated materials and hybrids. The parameters that were used for evaluation were based on infestation level (larval and pupal density) and damage levels (foliar damage, stalk tunneling, borer exit/ entry holes). Preliminary results indicated significant (P=0.05) differences between cultivars/lines in the parameters that were used for evaluation. There was a positive and significant (P=0.05) relationship between foliar damage and tunnel length. As evaluations were done under natural infestation, results on yields as a measure of resistance were not considered. From the data presented, it can be concluded that some parameters, like foliar damage and tunnel length, may be used as possible selection characters in resistance breeding. However, controlled uniform artificial infestation is required to obtain consistent results.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.153 MIH (Browse shelf) 1 Available 1T623915
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The search for multiple borer resistance in maize, mainly against Chilo partellus (Swinhoe) and Busseola fusca (Fuller), requires routine screening of a large number of germplasm sources. In the present investigation, the search for multiple borer resistance involved evaluation of inbreds, (local and exotic) synthetics, open pollinated materials and hybrids. The parameters that were used for evaluation were based on infestation level (larval and pupal density) and damage levels (foliar damage, stalk tunneling, borer exit/ entry holes). Preliminary results indicated significant (P=0.05) differences between cultivars/lines in the parameters that were used for evaluation. There was a positive and significant (P=0.05) relationship between foliar damage and tunnel length. As evaluations were done under natural infestation, results on yields as a measure of resistance were not considered. From the data presented, it can be concluded that some parameters, like foliar damage and tunnel length, may be used as possible selection characters in resistance breeding. However, controlled uniform artificial infestation is required to obtain consistent results.

English

9711|AGRIS 9702

Jose Juan Caballero

CIMMYT Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org