In vitro evaluation of botanicals and bioagents against Phaeoisariopsis griseola (Sacc) Ferraris causing angular leaf spot of French bean Adikshita*, Kansal Sandeep Department of Plant Pathology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan-173230, HP, India *Email for correspondence: sharmaadikshita89@gmail.com
Online published on 25 July, 2018. Abstract Angular leaf spot caused by Phaeoisariopsis griseola (Sacc) Ferraris is one of the most important foliar diseases of French bean in mid-hills of Himachal Pradesh. Survey and surveillance studies conducted revealed that the disease occurred in moderate to severe form in different French bean growing localities of Solan, Shimla and Sirmour districts of the state. The in vitro evaluation of botanicals against the mycelial growth P griseola revealed that the extract of garlic bulb at 10 per cent concentration caused significant growth inhibition (84.62%) of the test pathogen followed by neem seed kernel extract. Amongst the different fungal antagonists evaluated in vitro Trichoderma harzianum proved most inhibitory to P griseola while testing its antagonistic efficacy through dual culture or through its toxic substances. Top Keywords French bean, angular leaf spot, Phaeoisariopsis griseola, ecofriendly management, botanicals, antagonists. Top |