Efficacy of fungicides against Alternaria pluriseptata and Geotrichum candidus incitant of ivy gourd fruit

Abstract

IVY gourd suffers from pre and post-harvest diseases. This paper describes the sensitivity (MIC) of Alternaria pluriseptata and Geotrichum candidus against chlorothalonil and mancozeb fungicides. Sensitivity of 15 isolates of A.pluriseptata was tested against chlorothalonil. There was large variation in the sensitivity of these isolates. Some isolates were sensitive (600 µg/ml) while others were resistant (2500 µg/ml) i.e.  ranged from 600 µg/ml to 2500 µg/ml while in case of mancozeb sensitivity ranged from 60 µg/ml to 1100 µg/ml . In case of G.candidus the sensitivity of 10 isolates were tested against chlorothalonil and mancozeb. In chlorothalonil some isolates were sensitive & resistant i.e. ranged from650 µg/ml to 2000 µg/ml while in case of mancozeb sensitivity ranged from 20sµg/ml to 300 µg/ml. in vivo results also showed positive.