Evaluation of Biofungicides in the Control against Powdery Mildew Disease [Leveillula taurica (Lev.) Arm.] in Pepper

Abstract

In this study, Tea Tree Oil, (Timorex Gold), Orange Oil (Prev-Am), Reynoutria spp. extract (Regalia), Bacillus subtilis QST 713 (Serenade SC), Lactobacillus acidophilus, Lactobacillus paracasei (Vitanal) and a reference product Fluopyram+Tebuconazole (Luna Experience) were applied to pepper plants to determine the efficacy against powdery mildew disease caused by Leveillula taurica (Lev.) Arm on pepper. The disease on plants was evaluated based on the 0-5 scale when the disease reached to 20% on untreated plots. Trials were established as a randomized plot design with four replications. The disease severity was assessed using Towsend-Heuberger’s formula and the percentage effect of the applications was calculated using the Abbott formula. The conducted experiments were revealed that the highest % efficacy values of the preparations against powdery mildew were obtained from Timorex Gold (80%), Prev-Am (45%), Regalia (44.7%), Serenade (26.3%) and Vitanal (26.2%), respectively. The efficacy of the reference product, Luna Experience, against powdery mildew in pepper was found 89%. It has been concluded that Timorex Gold preparation performed enough efficacy against Leveillula taurica, and can be safely used and offered against powdery mildew.