Field Management of Late Blight of Tomatoes Caused by Phytophthora infestans Using Antibiotics from Streptomyces species
View/ Open
Date
2003Author
Mutitu, E. W
Mwaura, F. B
Muiru, W. M
T.jebe, F
Type
PresentationLanguage
enMetadata
Show full item recordAbstract
Antibiotic culture filtrates from Streptomyces isolates coded 28P and CS35 were tested for efficacy in the control
of late blight of tomatoes under field conditions. Crude culture filtrates, cell free culture filtrates, concentrated culture
filtrates and a mixture of the two cell free culture filtrates were evaluated. Dithane M45 was used as a standard chemical
check. The experiment was laid out in a Randomized Complete Block Design (RCBD) replicated four times with each
treatment appearing once in each block. Concentrating culture filtrates by removing 30% of water enhanced their efficacy
and the various culture filtrates had a significant (p<0.05) effect in controlling late blight disease. Mixing culture filtrates
did not have significant (p<0.05) effect in improving efficacy in late blight management. Concentrating culture filtrates
beyond 50% resulted in phytotoxic effects. The isolates had antifungal activity against Phytophthora infestans and with
enhancement of this activity they can be used to manage the disease either alone or in IPM programmes.
Citation
E. W. Mutitu., F. B. Mwaura., W. M. Muiru & F. T.jebet (2003). Field Management of Late Blight of Tomatoes Caused by Phytophthora infestans Using Antibiotics from Streptomyces species. African Crop Science Conference Proceedings, Vol. 6. 376-380Publisher
Department of Plant Science and Crop Protection, University of Nairobi, Kenya