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Leaf pubescence effects in wheat on yellow sugarcane aphids and greenbugs (Homoptera: Aphididae)



Leaf pubescence effects in wheat on yellow sugarcane aphids and greenbugs (Homoptera: Aphididae)



Journal of Economic Entomology 87(1): 231-240



Observations during previous wheat germ plasm evaluation tests indicated that wheat lines with high levels of leaf pubescence are resistant to the yellow sugarcane aphid, Sipha flava (Forbes). Earlier work also suggested the same relationship for the greenbug, Schizaphis graminum (Rondani), but the evidence was not as strong. This research studied the effects of leaf pubescence on the two aphid species in greater detail. Trichome length and density measurements were made on second and third leaves from seedlings of six pubescent wheat entries and two nearly glabrous wheat cultivars. Yellow sugarcane aphid and greenbug antibiosis and antixenosis tests were conducted using standard methods for the antibiosis test and new techniques for the antixenosis test. The results showed that leaf surface pubescence is of questionable value in a greenbug plant resistance program, but it is an effective resistance mechanism against the yellow sugarcane aphid.

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Accession: 002422390

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DOI: 10.1093/jee/87.1.231



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