EVALUATION OF DIFFERENT FUNGICIDES, BOTANICAL EXTRACTS AND BIOCON-TROL AGENTS AGAINST PENICILLIUM EXPANSUM THE CAUSAL AGENT OF BLUE MOLD OF APPLE

Abstract

Efficacy of various fungicides, their botanical extracts and bio-control agents against Penicillium expansum, the agent which cause blue mold of apple. Incidence of disease was recorded in Hyderabad and Tandojam. Various fungicides like Topsin-M, Melody Duo, Antracol, Cabriotop and Alliette at the different doses i.e. 100, 200 and 300 ppm, their botanical extracts like Ginger, Neem, Eucalyptus, Garlic and Onion, it was carried out at different doses i.e. 5, 10 and 15% by food poisoning method, their Pathogenicity test which was also performed to see the severity of disease in apples. The results showed that maximum disease incidence 53.45% was observed from Hyderabad and 46.55% was observed from Tandojam. It was observed that the disc method of inoculation showed a higher percentage (93.44%) as compared to the injection method of inoculation 65.55%. The growth of minimum linear colony of Penicillium expansum were observed for Topsin-M as 39.33, 32.00 and 25.00 mm respectively followed by Antracol 42.66, 35.00 and 30, Melody Duo 40.66, 35.66 and 30.00, Alliete 44.66, 36.00 and 31.00 and Cabriotop 46.33, 40.00 and 33.66. The growth of linear colony Penicillium expansum was observed as 41.00, 35.00and 27.66 mm for Ginger respectively followed by Neem 45.00, 38.00 and 33.66, Eucalyptus 48.00, 41.00 and 35.33, Garlic 52.33, 45.33 and 39.66) and Onion 61.66, 52.00 and 46.00. The linear colony growth of Penicillium expansum was minimum to observed for Guignardia sp. 29.66 mm, followed by Chaetomium sp. 35.33mm, Hypoxylon sp. 35.66mm , Fusarium sp. 40.66mm, Trichoderma sp. 47.66mm.