Weedborne Reservoirs and Seed Transmission of Verticillium dahliae in Lettuce

Plant Disease
Gary E ValladKrishna V Subbarao

Abstract

The seed transmission of Verticillium dahliae was evaluated in lettuce (Lactuca sativa). Seed collected from lettuce plants infected with V. dahliae were plated with or without surface sterilization on Sorenson's modified NP10 medium. Of the seed plated with or without surface sterilization, 90 and 66%, respectively, yielded colonies of V. dahliae. The incidence of Verticillium wilt ranged from 55 to 80% among lettuce plants grown from seed harvested from infected plants. All evaluated isolates of V. dahliae were capable of seed transmission in lettuce. A V. tricorpus isolate failed to cause significant disease in lettuce or to become seedborne. Storage of contaminated seed at seven temperatures ranging from -20 to 15°C for up to 72 weeks did not reduce the incidence of V. dahliae in seed, whereas storage at room temperature (23 ± 2°C) for 20 to 52 weeks reduced the incidence of V. dahliae without affecting seed viability. Of the 11 weed species collected from fields with a known history of Verticillium wilt of lettuce, four yielded V. dahliae. Pathogenicity tests demonstrated that isolates of V. dahliae from Sonchus oleraceus, Capsella bursa-pastoris, and Solanum sarrachoides were as virulent as or more virulent than an isolat...Continue Reading

References

Oct 24, 2008·Phytopathology·R G Bhat, K V Subbarao

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Citations

Jul 26, 2019·Plant Disease·Maria Lodovica GullinoAngelo Garibaldi
Jul 14, 2017·Phytopathology·Christine L CarrollKrishna V Subbarao
Apr 24, 2009·Annual Review of Phytopathology·Steven J KlostermanKrishna V Subbarao
Nov 1, 2009·Plant Disease·Mark J Schall, Donald D Davis
Mar 15, 2014·Phytopathology·B M Wu, K V Subbarao
Sep 1, 2011·Plant Disease·Jeremiah K S DungDennis A Johnson
May 28, 2019·Plant Disease·Xiaorong ZhengAndreas von Tiedemann
Mar 1, 2006·Molecular Plant Pathology·Emilie F Fradin, Bart P H J Thomma
Jan 13, 2012·Phytopathology·Dechassa DuressaSteven J Klosterman
May 14, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ryan J HayesKrishna V Subbarao
Apr 1, 2007·Plant Disease·Ryan J HayesKrishna V Subbarao
Jan 11, 2013·Phytopathology·Glenna M MalcolmMaría Del Mar Jiménez-Gasco
Dec 1, 2020·Frontiers in Plant Science·Nikhilesh DharSteven J Klosterman
Jul 1, 2009·Plant Disease·Steven J Klosterman, Ryan J Hayes

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