In vitro STUDIES ON THE BIOLOGICAL CONTROL AGENT Trichoderma koningii IN THE CONTROL OF Fusarium solani

Abstract

Onion rot caused by Fusarium solani is one of the predominant diseases of onion cultivation in the Batticaloa region. Studies were conducted with different concentrations (1.3 x 10 , 2.6 x 10 , 3.9 x 10 and 5.2 x 10 spores/ml) of seeded beneficial microfungi, Trichoderma koningii against F.solani in Oat Meal Agar (OMA) medium. Experiments were arranged in a Completely Randomised Design (CRD) with four replicates. Testing the inhibition of radial mycelial growth rates of F.solani in different concentrations of seeded T.koningii plates in vitro at room temperature (30 32æ%C), showed that 3.9 x 10 spores/ml seeded Trichoderma plates significantly reduced the mycelial growth of Fusarium Solani.