植物病理学および微生物学ジャーナル

概要

Effective Approaches of Potential Bioagent, Phytoextract, Fungicide and Cultural Practice for Management of Banana Fruit Rot Disease

Kedar Nath, Solanky KU and Kumawat GL

Banana fruit rot caused by Lasiodiplodia theobromae (Pat.) Griffth and Maubl. is an important emerging disease in South Gujarat region. It was frequently and abundantly isolated from finger rot in field and post-harvest fruit rot disease in markets as well storage house. Integrated disease management approaches would be an important for the management of post-harvest banana fruit rot disease. Four fungicides such as carbendazim and propiconazole @ 250 ppm, carbendazim 12%+mancozeb 63% @1500 ppm and mancozeb @ 2500 ppm completely inhibited the mycelial growth of L. theobromae and proved statistically superior over the rest of fungicides tested. Copper oxychloride stimulated the growth of L. theobromae. Two extracts such as garlic clove and cinnamon leaf extract at 10% concentration inhibited the mycelial growth of L. theobromae by 47.09 and 33.86% respectively. Five known bioagent tested by dual culture technique showed that Pseudomonas fluorescens and Bacillus subtilis were strong antagonism to L. theobromae by inhibiting mycelial growth up to 75.83% and 70.50% respectively. The results of field experiment showed that single spray of carbendazim @ 0.5 gL-1 , propiconazole @1 mlL-1, garlic clove and cinnamon leaf extract @100 mlL-1 water, Pseudomonas fluorescens and Bacillus subtilis@1 × 107 CFUml-1 and bunch covered with blue polythene exhibited greater control efficacy to banana finger rot disease in field condition. The fruits harvested from treated plant kept for natural ripening, cent percent fruit rot disease control was observed in propiconazole treated fruit under storage condition up to eating ripe stage.