Effect of Azoxystrobin Based Fungicides in Management of Chilli and Tomato Diseases

Abstract

Chilli and tomato are two major vegetable crops of the world with India being one of the important producers. Vulnerable to many diseases, chemical control has been the most effective method adopted by farmers to protect their crops from fungal pathogens. The pathogens have started developing resistance against the conventionally used fungicides recommended to the farmers. Second generation fungicides have proved as a new ray of hope in better management of diseases under field conditions. Strobilurins have not been much tested in Indian subcontinent for their efficacy against many diseases. Two azoxystrobin based fungicides ONESTAR 23 % SC and AMISTAR 23 % SC were used to study their efficacy along with other commonly used fungicides, against blight disease of tomato and fruit rot and powdery mildew of chilli in Varanasi for 2 years from 2010–2011 to 2011–2012. Maximum disease reduction was observed in plants treated with Onestar 23 % SC and Amistar 23 % SC in both chilli and tomato (70–78 % reduction recorded in case of chilli while 69–71 % recorded in case of tomato) with enhanced yield (1.29 fold increment in chilli and 1.39 fold increment in tomato) in both seasons. No phytotoxicity symptoms were observed in the plants against the fungicides tested suggesting the importance of using fungicides in proper dose and at proper interval. © 2014, The National Academy of Sciences, India.