Bacillus thuringiensis - a new perspective for an induced protection to coffee leaf rust
1989
Roveratti, D.S. (Instituto Biologico, Sao Paulo (Brazil). Secao de Bioquimica Fitopatologica) | Teixeira, A.R.R. | Moraes, W.B.C.
Susceptible coffee plants (Coffea arabica cv. 'Mundo Novo') treated with a suspension of Bacillus thuringiensis or with three of commercial products (Thuricide HD, Bactimos and Bactospeine PM) of B. thuringiensis were protected against a later inoculation with Hemileia vastatrix, the causal agent of coffee leaf rust. Thuricide HD was effective at concentrations from 5 to 20 mg/ml, at this concentration, protection reached 90 per cent, lasted for at least 5 weeks, and was systemic. Induced resistance was determined by the reduction of the average number of lesions per leaf in treated leaves when compared with non-treated controls. A decrease in lesion size as well as a delay in sporulation time were also observed in protected plants treated with Thuricide HD
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