In-vitro Efficacy of Different Chemical Fungicides and Plant Extracts Against Alternaria alternata Causing Alternaria Leaf Spot Disease in Brinjal
Ajeet Pratap Yadav
Department of Plant Pathology, P.G. College Ghazipur, VBS Purvanchal University, Jaunpur-222001 U.P., India.
Ajay Kumar
Department of Plant Pathology, Amar Singh College Lakhaoti Bulandshahr, Chaudhary Charan Singh University, Meerut-250004 U.P., India.
Himanshu Kumar Gupta
Department of Plant Pathology, P.G. College Ghazipur, VBS Purvanchal University, Jaunpur-222001 U.P., India.
Rajneesh Kumar Awasthi *
Department of Plant Pathology, P.G. College Ghazipur, VBS Purvanchal University, Jaunpur-222001 U.P., India.
Riya Gera
Department of Plant Protection, Chaudhary Charan Singh University, Meerut-250004 U.P., India.
Vivek Shukla
Department of Plant Protection, Chaudhary Charan Singh University, Meerut-250004 U.P., India.
*Author to whom correspondence should be addressed.
Abstract
Five different chemical fungicides and three plant extracts were evaluated against Alternaria alternate causing Alternaria leaf spot disease in brinjal. The experiment was carried out in the laboratory of plant pathology at Chaudhary Charan Singh University Meerut, during kharif season 2021-22. During survey the maximum disease incidence was recorded (37.8%) Rajpura in Meerut and minimum (10.9%) incidence was recorded in Lakhaoti, survey and metrological data presented in the (Tables 2 & 3). The incidence of the disease varied from 10.9 to 37.8 percent due to difference in environmental condition. The concentration of all fungicides and Plant-extracts was kept at 500, 1000 and 2000 ppm. Mycelial growth was measured to continue zero to ten days. Mainly four chemical fungicides (Thaiophinate Methyl 70%WP, Propineb 70% WP, Carbendazim 50%WP and Chlorothalonil 75% WP) and Neem extract significantly inhibited the mycelial growth of the pathogen (Alternaria alternata). Among all those, four fungicides and Neem extract giving the better results. Maximum 100% mycelial growth inhibition was recorded in Thaiophinate Methyl 70%WP, 94.45% mycelial growth inhibition was recorded in Propineb 70% WP, 86.09% mycelial growth inhibition was recorded in Carbendazim 50%WP and 84.80 growth inhibition was recorded in Chlorothalonil 75% WP and in plant extract 18.53% inhibition was observed in Neem and 14.33% inhibition was observed in garlic. However, Azoxystrobin 23% SC and Onion also had some effect, which is mentioned in the result of the paper.
Keywords: Efficacy, fungicides, plant extract, Alternaria alternata