Improving yield parameters in onion through antagonistic activity of Trichoderma spp. against Fusarium bulb rots disease

Onion, a leading vegetable crops among the species of Allium all over the globe by virtue of its having medicinal properties, is well known for its economicae importance throughout the world. However, recently many workers have reported that a pathogenic fungus, Fusarium proliferatum, known to infect a wide range of crop and ornamental plants, is causing bulb rots disease in onion. The current study reveals that this pathogenic fungus has lethal effect on onion plantlets. Chemicals are used to combate this disease, but these being unfriendly to non-target organisms, the bio control agents namely, Trichoderma harzianum/Hypocrea lixii, Trichoderma viride and Trichoderma asperellum were evaluated. The results revealed that T. harzianum/H. lixii, T. viride and T. asperellum used in combination restrained the infection and enhanced the onion yield.