Efficacy of several biorational compounds for control of bacterial wilt of tomato under greenhouse conditions

Several reduced-risk compounds, including STBX-016 (Phyton 27), yucca extract, QRD 600 (Muscodor), and acibenzolar-S-methyl (Actigard), were evaluated under greenhouse conditions for suppression of bacterial wilt on tomato caused by Ralstonia solanacearum. The compounds were applied as a foliar spra...

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Bibliographic Details
Published in:Phytopathology 2006-06, Vol.96 (6), p.S54-S54
Main Authors: Ji, P, Momol, T M, Jones, J B
Format: Article
Language:English
Subjects:
Lycopersicon esculentum
Ralstonia solanacearum
Yucca
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Summary:Several reduced-risk compounds, including STBX-016 (Phyton 27), yucca extract, QRD 600 (Muscodor), and acibenzolar-S-methyl (Actigard), were evaluated under greenhouse conditions for suppression of bacterial wilt on tomato caused by Ralstonia solanacearum. The compounds were applied as a foliar spray and/or soil drench before and after tomato plants were inoculated with R. solanacearum. Test plants were incubated in the greenhouse and disease incidence was recorded weekly and quantified as percentage of wilted plants. STBX-16 or yucca extract provided significant protection of tomato plants against bacterial wilt. Disease incidence of treated plants was 20-25% four weeks after transplanting with STBX-16 or yucca extract treatments, while 100% of untreated plants wilted. QRD 600 reduced disease incidence significantly compared to the untreated control; however, it was less effective compared with yucca extract or STBX-16. Application of these compounds in conjunction with Actigard showed a tendency to further reduce disease incidence. We conclude that certain biorational products tested in the greenhouse studies appeared to be effective in the suppression of bacterial wilt and may provide new options in managing this disease in tomato production.
ISSN:0031-949X