In Vitro Antagonistic Activity of Trichoderma Viride Isolates Against Sclerotinia Sclerotiorum and Their Role in Growth Promotion of Common Bean

Abstract

A study was done to investigate the antagonistic effects of three Trichoderma viride isolates (TV1, TV2 and TV3) on Sclerotinia sclerotiorum. The results revealed that the isolate TV1 proved to be the best in suppressing the mycelial growth by 77% after 7 days of incubation. However 74.91% and 50% inhibition were recorded on 5th and 3rd days of incubation, respectively. The isolate TV2 caused inhibition of 74.77% on 7th day, and 72.66% and 48.33% after 5th and 3rd days of incubation, respectively. 72.54%, 70.41%, and 51.66% inhibition in mycelial growth of the pathogenic fungus was caused by TV3 isolate after 7th, 5th, and 3rd days of incubation respectively. All the test isolates of T. viride showed a significant effect on the vigour index of common bean. The maximum germination percentage was observed on treatment with TV1 isolate (85%) followed by TV2 (83%) and TV3 (81%) respectively, in comparison to untreated seeds which showed a germination percentage of 73%. Maximum vigour index was shown by those plants whose seeds were treated with TV1 (11560), followed by those treated with isolate TV2 (10707) and TV3 (9234), whereas the control plants showed significantly lower vigour index of 7446 in comparison to treated plants.

Bio-Management of Fungal Leaf Spot of Tomato (Solanum Lycopersicum L.) Using Indigenous Trichoderma Isolates

“…Trichoderma species and other bioagents may be used as a biological control agent against a number of plant diseases, according to several studies. These agents are becoming more and more popular in agriculture because they have dramatically reduced crop loss (Sharon et al, 2001;Jegathambigai et al, 2009;Abdel Wahab et al, 2020;Jan et al, 2022a;Nisa et al, 2022). These findings make it evident that local isolates of Trichoderma were successful in combating every pathogenic fungus tested that is connected to tomato plant leaf spot disease.…”