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Resistance of sunflower species to the western potato leafhopper



Resistance of sunflower species to the western potato leafhopper



Environmental Entomology 10(5): 697-700



Twenty-nine species of sunflower (Helianthus) and Viguiera porteri (Gray) Blake were evaluated in the laboratory for resistance to the western potato leafhopper, E. abrupta DeLong. Leafhopper development was significantly (5% level) prolonged and survival was significantly decreased on most of the Helianthus spp. than on cultivated H. annuus L., hybrid variety 896 when plants were initially colonized by nymphs. Colonization of plants by adult leafhoppers resulted in significantly smaller (10% level) popualtions on 14 Helianthus spp. but significantly larger populations on 3 Helianthus spp. than on hybrid 896 1 mo. after the initial infestation. Injury to plants of most Helianthus spp. ranged from no symptoms to moderate chlorosis 7 days after infestation, but plants of 20 spp. exhibited moderate chlorosis to wilting after 1 mo. Eight of the resistant Helianthus spp. could be utilized as a source of leafhopper resistance in cultivated sunflower quite readily because of their crossing compatibility.

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Accession: 000969890

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DOI: 10.1093/ee/10.5.697


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