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Tuber graft transmission of potato leaf roll


, : Tuber graft transmission of potato leaf roll. Canadian Jour Agric Sci 35(3): 238-241

In experiments repeated during 3 seasons, involving over 1500 tuber grafts of 3 potato vars. Carter's Early Favorite, Netted Gem, and Canus - the leafroll virus was successfully transferred to healthy sets. Occasionally transmission was successful in 48% of the grafts, and 12-20% transmission was fairly common. Core grafts were as effective as grafts secured by binding diseased and healthy sets together. The placing of diseased tissue within 1/4 in. of the eye in healthy sets tended to give the highest transfer. Grafts made from Carter's Early Favorite seemed more successful than those made from Canus or Netted Gem. Transfer of the virus was definitely more successful in grafted sets stored at 40* F for 26 days than in those stored for 5 days. When planting occurs within a day or so after sets are cut the danger of their becoming infected with the leafroll virus is practically eliminated.

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