Resistance of Bt maize to the asian corn borer (Lepidoptera: Pyralidae) in China
By: He, K | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico) | Proceedings of the Asian Regional Maize Workshop Bangkok (Thailand) 5-8 Aug 2002.
Contributor(s): Srinivasan, G.|Zaidi, P.H.|Prasanna, B.M.|Gonzalez, F.|Lesnick, K [eds.] | Wang, Z [coaut.]
| Wen, L [coaut.] | Zhou, D [coaut.].
Material type: 
BookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 2004Description: p. 19-26.ISBN: 970-648-116-8.Subject(s): Biological control | China | Lepidoptera | Maize | Ostrinia furnacalis | Pest insects | Protein content | Pyralidae | Transgenic plants | CIMMYT | Zea mays AGROVOCSummary: The Asian corn borer (ACB), Ostrinia furnacalis (Guenee), is the most important insect pest for maize in China. Despite consistent losses to ACB, farmers are reluctant to implement current integrated pest management (IPM) tactics because the cost and skill demand. Bt transgenic maize provides a new way for ACB control. Monsanto's YieldGard(r) of Bt transgenic maize, expressing CrylA(b) protein, and non-Bt control were evaluated in Beijing. Laboratory bioassays were carried out by exposing neonates to an agar-free diet containing Bt maize whorl leaves, tassel, and anther or directly to fresh silk and pollen. These are the tissues initially attacked by neonates in the field. All of them except pollen contained sufficient toxin protein to kill >95% of larvae within 7 day. Surviving larvae had also not grown beyond 1st instar and weighed <0.1 mg. Although the larvae feeding on Bt maize pollen were significantly smaller than those on non-Bt maize, there was no significant difference in mortality. Field trials were also conducted by artificial infestation with ACB at mid-whorl, VI7, and silking stages. Damage ratings and number of larvae survived per plant indicated that Bt maize was highly resistant to ACB. Therefore, YieldGard(r) offers potential for a season-long protection against first- and second- generation ACB.Collection: CIMMYT Publications Collection
| Item type | Current location | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds |
|---|---|---|---|---|---|---|---|---|
| Conference proceedings |
CIMMYT Knowledge Center: John Woolston Library
Lic. Jose Juan Caballero Flores
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CIMMYT Publications Collection | Look under series title (Browse shelf) | 1 | Available | B630601 |
The Asian corn borer (ACB), Ostrinia furnacalis (Guenee), is the most important insect pest for maize in China. Despite consistent losses to ACB, farmers are reluctant to implement current integrated pest management (IPM) tactics because the cost and skill demand. Bt transgenic maize provides a new way for ACB control. Monsanto's YieldGard(r) of Bt transgenic maize, expressing CrylA(b) protein, and non-Bt control were evaluated in Beijing. Laboratory bioassays were carried out by exposing neonates to an agar-free diet containing Bt maize whorl leaves, tassel, and anther or directly to fresh silk and pollen. These are the tissues initially attacked by neonates in the field. All of them except pollen contained sufficient toxin protein to kill >95% of larvae within 7 day. Surviving larvae had also not grown beyond 1st instar and weighed <0.1 mg. Although the larvae feeding on Bt maize pollen were significantly smaller than those on non-Bt maize, there was no significant difference in mortality. Field trials were also conducted by artificial infestation with ACB at mid-whorl, VI7, and silking stages. Damage ratings and number of larvae survived per plant indicated that Bt maize was highly resistant to ACB. Therefore, YieldGard(r) offers potential for a season-long protection against first- and second- generation ACB.
English
0501|AGRIS 0501|AL-Maize Program
Juan Carlos Mendieta
CIMMYT Publications Collection
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