Efficacy of Trichoderma sp. to Control Lasiodiplodia theobromae, Casual Agent of Sweetpotato Root Rot Disease

Palomar, Manuel; Palermo, Victoria

Efficacy of Trichoderma sp. to Control Lasiodiplodia theobromae, Casual Agent of Sweetpotato Root Rot Disease

2003

Palomar, Manuel | Palermo, Victoria

Microbial control of sweetpotato root rot pathogen (Lasiodiplodia thebromae (Pat.) Griff. & Maubi.) was studied with the use of an antagonist (Trichoderma sp.) under screenhouse and field conditions. Application of 10-60g Trichoderma FI7c suppressed L. theobromae infection and reduced the incidence of root rotting during storage especially if applied two to three months after planting of sweetpotato in pots. Likewise, in field experiments, regardless of inoculum densities of Trichoderma FI7c (50, 75 and 100 g), root infection was reduced during storage when the antagonist was applied two and three months after planting than when applied during planting to one month. Control provided by Trichoderma FI7c was economically sound and even better compared to the effect of Benlate, a systemic fungicide.

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