Further Studies on Resistance to Green Peach Aphid1 and Potato Aphid1 in the Wild Tuber-Bearing SolanumSpecies2

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Several sources of resistance to green peach aphid, Myzus persicae (Sulzer), and to potato aphid, Macrosiphum euphorbiae (Thomas), have been identified in the wild tuber-bearing Solanum (Tourn.) L. species. Resistance to both species indigenous to Mexico: species resistant to green peach aphid include S. bulbocastanum Dun., michoacanum (Bitt.) Rydb., brachistotrichum (Bitt.) Rydb., and stenophyllidium Bitt; species resistant to potato aphid include bulbocastanum, hjertingii Hawkes, polytrichon Rydb., and stoloniferum Schlechtd. and Bche Resistance to the 2 aphid species was generally associated. The relative resistance of the various species of Solanum under field conditions to both green peach aphid and potato aphids was found primarily in potato aphid proved highly consistent in different years despite considerable variation in pest density. Our data suggest that potato seedlings can be effectively evaluated for resistance to both green peach aphid and to potato aphid over a wide range of aphid densities.

Document Type: Research Article

Publication date: February 1, 1970

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