Evaluation of Thymol as Biofumigant for Control of Bacterial Wilt of Tomato Under Field Conditions

Plant Disease
P JiJeffrey B Jones

Abstract

Volatile plant essential oils thymol and palmarosa oil, used at a concentration of 0.7%, were evaluated under field conditions for control of bacterial wilt of tomato caused by Ralstonia solanacearum. The experimental fields were artificially infested with the bacterial pathogen. Two hours after infestation, the plant essential oils were applied, then the plots were sealed with plastic mulch for 3 or 6 days. Tomato seedlings were transplanted into the field 7 days later. In fall of 2002, 92.5% of tomato plants (cv. Equinox) wilted in the untreated control plots. Both thymol and palmarosa oil soil treatments reduced bacterial wilt incidence significantly. Thymol was more effective than palmarosa oil based on the final assessment, when 33.1 and 48.1% of the plants had wilted in plots treated with thymol and palmarosa oil, respectively. Soil treatment with either thymol or palmarosa oil produced significantly higher yield of tomato than the untreated control. In 2003, only thymol was evaluated. Thymol application significantly reduced bacterial wilt incidence on the susceptible cultivar Solar Set. Disease incidence in untreated plots reached 65.5%, while in thymol treated plots only 12% of plants wilted. Thymol treatment also incr...Continue Reading

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Citations

Oct 8, 2014·The Plant Pathology Journal·Jeum Kyu HongYoung Shik Kim
Jan 30, 2007·Applied and Environmental Microbiology·F B IriarteJ B Jones
Jun 5, 2015·Parasitology Research·Laryssa Xavier AraújoCaio Márcio Oliveira Monteiro
Oct 11, 2014·Parasitology Research·Renata da Silva MatosTatiane Pinheiro Lopes Novato
Nov 12, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Juanni ChenWei Ding
Jun 30, 2009·Parasitology Research·Caio Márcio de Oliveira MonteiroRalph Maturano
Oct 8, 2014·The Plant Pathology Journal·Mohamed A A SeleimFarag A Saead
Feb 1, 2017·Frontiers in Microbiology·Abhay K PandeyVivek K Bajpai
Jun 15, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shili LiWei Ding
Nov 1, 2009·Plant Disease·Gabriel Mahbou Somo ToukamPhilippe Prior
Oct 23, 2020·Microbes and Environments·Hui-Zhen FuMasafumi Shimizu

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