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Components of resistance in maize (Zea mays L.) to first and second-generation Chilo partellus (Swinhoe)

By: Material type: ArticleArticlePublication details: 1994ISSN:
  • 0025-6153
Other title:
  • Componenti della resistenza del mais (Zea mays L.) a Chilo partellus (Swinhoe) di prima e seconda generazione
Subject(s): DDC classification:
  • 95-036208
 In: Maydica (Italy). (1994). v. 39(3) p. 165-170Summary: Resistance in maize (Zea mays L.) to Chilo partellus (Swinhoe) was measured under artificial infestation at whorl stage and at anthesis. When infested at whorl stage (2.5 wk after emergence), the cultivars MMV 400, MBR 8650, MBR 8668, MBR 8637, MMV 600, ER-29SVR, Poza Rica 7832, Bulk CG 4141, Katumani Composite B and ICZ2-CM showed leaf feeding resistance, dead heart resistance and stem feeding resistance to C. partellus. The plants of MBR 8637, ER-29SVR and Poza Rica 7832 caused significant adverse effects on the growth of C. partellus, the plants of these three cultivars lost very little biomass per unit larval weight gain and lost little grain yield under infestation with C. partellus in the fields, indicating that tolerance mode of resistance also contributed to the overall resistance of ER-29SVR, MBR-8637 and Poza Rica 7832. When the cultivars were infested at anthesis, the cultivar MBR 8637, MMV 400 and Poza Rica 7832 showed stem feeding resistance to C. partellus. The rate of larval developmen t on MBR 8637 and Poza Rica 7832 was significantly lower than the other cultivars. Such genotypes possessing genes for resistance to C. partellus would be very useful for improving the overall level of resistance in the existing commercial varieties or developing new resistant hybrids of maize
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4 tables; 1 graph; 17 ref. Summary (En)

Resistance in maize (Zea mays L.) to Chilo partellus (Swinhoe) was measured under artificial infestation at whorl stage and at anthesis. When infested at whorl stage (2.5 wk after emergence), the cultivars MMV 400, MBR 8650, MBR 8668, MBR 8637, MMV 600, ER-29SVR, Poza Rica 7832, Bulk CG 4141, Katumani Composite B and ICZ2-CM showed leaf feeding resistance, dead heart resistance and stem feeding resistance to C. partellus. The plants of MBR 8637, ER-29SVR and Poza Rica 7832 caused significant adverse effects on the growth of C. partellus, the plants of these three cultivars lost very little biomass per unit larval weight gain and lost little grain yield under infestation with C. partellus in the fields, indicating that tolerance mode of resistance also contributed to the overall resistance of ER-29SVR, MBR-8637 and Poza Rica 7832. When the cultivars were infested at anthesis, the cultivar MBR 8637, MMV 400 and Poza Rica 7832 showed stem feeding resistance to C. partellus. The rate of larval developmen t on MBR 8637 and Poza Rica 7832 was significantly lower than the other cultivars. Such genotypes possessing genes for resistance to C. partellus would be very useful for improving the overall level of resistance in the existing commercial varieties or developing new resistant hybrids of maize

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