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Resistance to wheat curl mite (Acari: Eriophyidae) in greenbug-resistant 'Gaucho' triticale and 'Gaucho' X wheat crosses



Resistance to wheat curl mite (Acari: Eriophyidae) in greenbug-resistant 'Gaucho' triticale and 'Gaucho' X wheat crosses



Journal of economic entomology 88(4): 1032-1036



Greenbug-resistant 'Insave F.A.' rye, 'Gaucho' triticale, and crosses of Gaucho X wheat, Sell 74G80-2 and Sell 74G559-6, were compared with wheat cultivars for their reaction to the wheat curl mite, Eriophyes tulipae Keifer, the vector of wheat streak mosaic virus. It was previously observed that rye generally is more resistant to the mite than wheat. In our study, Gaucho, which is the product of an Insave F.A. rye X 'Chinese Spring' wheat cross, and wheat lines derived from Gaucho X wheat crosses, showed a high degree of resistance to the mite, whereas the susceptible entries exhibited severe mite damage symptoms including leaf curling and trapping and large numbers of mites. The wheat streak mosaic virus was transmitted to all test entries by heavy initial infestations of viruliferous mites. Light infestations of 5 mites per plant did not result in disease symptoms, except in mite-susceptible entries. The results also indicate that the source of wheat curl mite resistance in 'TAM 107' wheat, widely planted in wheat streak virus-prone areas of the Great Plains, traces back to Gaucho triticale.

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Accession: 013185196

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DOI: 10.1093/jee/88.4.1032


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