Analysis of efficacy of a biocontrol agent to reduce the transmission of infection in damping-off epidemics
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We demonstrate a simple analysis based on generic epidemiological processes to quantify the efficacy of Trichoderma harzianum to control damping-off disease caused by Rhizoctonia solani. The method quantifies the rate at which disease is transmitted in a population of plants, and we use the reduction in disease transmission as a measure for efficacy of the control agent. Using epidemics in replicated microcosms we show how the method can be used to quantify i) a reduction in the secondary transmission rate; ii) the effect of soil type on the efficacy of biocontrol and iii) the effect of the timing of the application on the efficacy of biocontrol.
Otten, W., Bates, A. and Gilligan, C.A. 2004. Analysis of efficacy of a biocontrol agent to reduce the transmission of infection in damping-off epidemics. In: Y. Elad, I. Pertot and A. Enkegaard, eds. Proceedings of a meeting of the WGs: Management of plant diseases and arthropod pests by BCAs and their integration in agricultural systems, S. Michele all’Adige, Trentino, Italy, 9-13 June 2004. IOBC/wprs Bulletin. 27(8): pp.275-279