Evaluation of different fungicides to control Alternaria leaf spot of chilli (Alternaria solani Ell. Mart.) under in vitro and in vivo conditions

Experiment was conducted under field conditions in kharif season of 2003 and 2004 to evaluate the performance of six fungicides against leaf spot of chilli caused by Alternaria solani. In first year trial (Kharif 2003), the performance of Carina was best among all other fungicides. The percentage of disease index (PDI) in untreated plots at 45,60 and 75 DAT were 15.17, 20.24 and 24.19 percent, while on the same dates of transplanting in Carma treated plots, PDI was 3.70, 4.44 and 4.93 respectively. In second year trial (kharif 2004), the results were almost similar to previous year. However, it was observed that at 75 DAT there was no significant difference in PDI among Carma, Quintal, Dithane M-45 and Bavistin treated plots. Under laboratory conditions it was found that, Carma was also found much effective than other fungicides and there was no significant difference among Carma, Quintal, Dithane M-45 and Bavistin at 1000 ppm concentration.