Science Heritage Journal | Galeri Warisan Sains (GWS)

Tomato (Lycopersicum esculentum), despite having thousands of commercial growers and millions of tons of production, has different soil borne fungal diseases as its major setback, and Rhizoctonia solani causing damping off is a major one. To evaluate the potential inhibition effect of different chemical fungicides, an experiment was carried out at the Plant Pathology laboratory of Lamjung campus. Five chemical fungicides viz. Carbendazim 50% WP (Bavistin), Mancozeb 75 % WP (All M-45), Metalaxyl 8 % + Mancozeb 64 % WP (Redomill), Copper oxychloride 50 % WP (Blitox), Carbendazim 12 % + Mancozeb 63 % WP (SAAF) of each at concentrations of 50PPM, 100PPM, and 150PPM and unamended media as a control were used with 3 replications. Poisoned food technique method was followed using Completely Randomized Design in lab conditions. Carbendazim 50% WP was found to be the best among five fungicides showing mycelial inhibition above 99% at all of the concentrations used. Copper oxychloride 50 %WP on the other hand, showed minimum growth inhibition barely crossing 10% of inhibition at all of the concentration used. Mycelial growth inhibition increased on increasing the concentration of chemical fungicides used, whereas some chemicals could be effectively used under lower concentration to minimize hazardous effect on soil and environment as their performance against the pathogen was quite impressive.