The role of leaf pubescence in resistance of soybean to the false melon beetle (FMB), Atrachya menetriesi FALDERMANN, was investigated in the field and laboratory using genotypes of soybean with varying levels of pubescence on leaves. There was a negative correlationship between trichome density on leaves and levels of leaf damage caused by feeding of adult FMB. Most of the genotypes which exhibited a high level of resistance to FMB were highly pubescent. There was a clear difference in the damage level between the high pubescent variety, T-207, and the glabrous variety, Mumoh-hadaka, in dual-choice assays. The differences in the damage level between T-207 and Mumoh-hadaka did not change even after reciprocal application of methanol and n-hexane extracts and also squeezed plant sap of both varieties. Furthermore, when trichomes were removed by shaving a leaf of the pubescent variety, T-207, the beetle attack was overwhelmingly biased to the shaved part. SEM observations revealed only the normal type of trichomes, and no glandular trichomes, on the soybean leaf. All these facts suggest that leaf pubescence might be a major factor associated with the resistance of soybean to FMB.
CITATION STYLE
Kanno, H. (1996). Role of Leaf Pubescence in Soybean Resistance to the False Melon Beetle, Atrachya menetriesi FALDERMANN (Coleoptera: Chrysomelidae). Applied Entomology and Zoology, 31(4), 597–603. https://doi.org/10.1303/aez.31.597
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