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.