SCREENING OF MARIGOLD GERMPLASM AND MANAGEMENT AGAINST ALTERNARIA LEAF BLIGHT (ALTERNARIA TAGETICA)UNDER FIELD CONDITIONS IN PUNJAB
DOI:
https://doi.org/10.53555/eijaer.v10i4.118Keywords:
fungicides, Alternaria tagetica, tebuconazole, trifloxystrobin, Azadirachta indicaAbstract
Efficacy of six different fungicides and botanicals were evaluated against Alternaria tagetica, a pathogen posing a significant threat to marigold production.The study involved field screening of marigold germplasm during 2022 & 2023, where the percent disease index of Alternaria blight was recorded in both the years. The screening data indicated that Pusa arpita and Pusa deep showed highly susceptible reaction to the disease with an incidence of 68.19 and 66.01percent.In contrast Arka bhanu exhibited a moderately resistant reaction with an incidence of 18.19 percent. Out of six fungicides tested Alternaria blight, tebuconazole 50% +trifloxystrobin 25 % WG was found highly effective with percent disease index of (10.00%) closely followed by tebuconazole 25.9% EC (13.22%) and azoxystrobin 23% SC (15.92%)when sprayed at @ 0.5% conc. Maximum disease was obtained in .Chlorothalonil 75% WP(39.41%)when sprayed @0.2%conc.Similarly, in case of botanicals extracts of Allium sativum and Azadirachta indica were found effective with a percent disease index of (19.89 and 25.71percent).Highest yield and no of flowers per plant was also observed in plant treated with tebuconazole 50% +trifloxystrobin 25 % WG in fungicides and Allium sativum extract in case of botanicals. Overall, the findings underscored the potential of integrated disease management strategies involving fungicides and botanicals to mitigate the Alternaria leaf blight in marigold.
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