Crown rot of cucumber (Cucumis sativum) caused by Fusarium solani. The present investigations carried out the All combination i.e. Benomyl + Trichoderma harzianum, Trichoderma harzianum + Neem cake and Benomyl + Neem cake were found effective to reduce disease incidence of crown rot of cucumber over check at 40 and 60 days after sowing. Among the all treatments combination of Benomyl + Trichoderma harzianum (15.62 and 22.22%) was found superior followed by Benomyl + Neem cake (21.87 and 28.00%) at 40 and 60 days, respectively and soil application of organic amendments. All the organic manure tested reduce crown rot incidence in cucumber significantly over check. Neem cake was most effective to reduce incidence of crown rot in cucumber over all other treatments with minimum disease incidence (18.75 and 23.07% at 40 and 60 days respectively) followed by mustard cake (21.87 and 24.00 at 40 and 60 days respectively to reduce incidence of crown rot in cucumber.

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