Vol. 12, Issue 8 (2023)

Author(s):
Kanika Pagoch, PK Raina, SS Pagoch and AP Singh

Abstract:
The present investigation was conducted in the pot nursery under the polyhouse conditions. Artificial inoculation of Trichoderma isolates through different treatment combinations into soil pre-inoculated with Fusarium oxysporum f. sp. cucumerinum under pot culture study favoured greater proliferation of Trichoderma population in rhizosphere that resulted in drastic reduction of F. oxysporum f. sp. cucumerinum population. After 60 days of sowing, the local isolate, T. viride (Tv₅) reduced cfu (1.50 ´ 10⁴ g^-1 of soil) of the pathogen with the treatment seed biopriming (Trichoderma) + soil application (FYM + Trichoderma) which proved superior to the rest of the isolates. Under pot study, all the treatments with Trichoderma species reduced pre and post emergence mortality and increased root and shoot length. Pre and post emergence mortality reduced maximum with T. viride (Tv₅, local isolate), also, root and shoot length increased to the maximum with T. viride (Tv₅, local isolate), irrespective of the treatment.