Vasinfectum,Fusarium oxysporum f.sp. However, their use poses certain problems of residues left over on crops, which has gained considerable importance in recent years, not only in India but also throughout the world.Results of antibiotic sensitivity pattern of those endophytic bacteria suggested that they can be utilized as a cost-effective biological control agent in.The reduction of inoculums density or disease producing activities of a pathogen or parasite in its active or dormant stage by one or more organisms accomplished naturally or through manipulation of the environment, host or by introduction of one or more antagonists.Macrophomina phaseolina, Pythium, Sclerotium rolfssiFusarium oxysporum f.sp. Although several methods are followed for this purpose, disease control by chemicals is the promising one especially under intensive cropping programmes. Therefore, control of plant diseases assumes greater importance. The losses are going to increase with change in agricultural practices and our country, which is tropical with warm and humid climate, provides ideal conditions for development and spread of diseases of crops cultivated under good management systems.

вЂ“ Tricoderma used for seed treatment. Innundative application- The biocontrol agent is applied directly to the infection court at high population level. Ultimum and bacteria suppress the damping off disease in cucumbers.Fluorescent iron chelator siderophores such as Pseudobactins and pyoverdins produced by P.fluorscence chelate the iron available in the soil, thereby, depriving the pathogen of its Fe requirement

Give protection throughout the crop period. Less costly and cheaper than any other method. For Ex.- PGPR are used for seed bacterization.

It involves harnessing disease-suppressive microorganisms to improve plant health. They can be combined with biofertilizer.Biological control is nothing but ecological management of community of organisms. Application is safer to the environment. They do not cause toxicity to the plant.

Agriculture University, Jobner (Raj.

Biocontrol Agents Antibiotics