G. Ramakrishnan ¹, R. Jeyarajan ¹, D. Dinakaran ¹

Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University Coimbatore 641 003, IN

Abstract

A simple formulation of Trichoderma viride Pers ex. S.F. Grey for seed pelleting was developed by mixing tale powder with Trichoderma biomass obtained by growing the fungus in molasses-yeast medium for 15 days and drying. For effective adherence to the seeds CMC was added @ 0.5 % leveJ after drying. This formulation packed in polythene bags yielded 8 x 10⁷ colonies/g after 120 days. Seed treatment with this product effectively reduced the ischolar_main rot diseases of urd bean (Vigna mungo {L.} Hepper caused by Macrophomina phaseolina (Tassi) Goid. both in the artificially infested soil and natural soil in farmers fields.

Keywords

Macrophomina phaseolina, Biocontrol, Trichoderma viride, Talc-Based Formulation, Vigna mungo.

Full Text

   

R. Sridar ¹, G. Ramakrishnan ¹, D. Dinakaran ¹, R. Jeyarajan ¹

Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore 641 003, IN

Abstract

Bacillus subtilis has been used for many years to control soil-borne plant pathogens and increase plant growth (Turner and Backman, 1991). The increased yield of urdbean (Vigna mungo) due to Rhizobium application has been reported by Balasubramanian and Palaniappan (1983). B. subtilis seed treatment also improved the crop stand and yield (Merriman et al., 1974). Therefore, studies were conducted to assess the effect of seed treatment with antagonists on the nodulation and ischolar_main rot incidence.

Keywords

Rhizobium, Antagonist, Bacillus subtilis, Nodulation, Root Rot.

Full Text

   

R. Sridar ¹, G. Ramakrishnan ¹, D. Dinakaran ¹, R. Jeyarajan ¹

Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, 641 003, IN

Abstract

Bacillus subtilis (Cohn) has been used for many years to control plant pathogens and to increase plant growth (Turner and Backman, 1991). This bacterial antagonist is known to produce extracellular antibiotics, that are inhibitory to some plant pathogens (Podile et al., 1988). A commercial preparation of B.subtilis A.13 has been developed under the trade name Quantum 4000 and is recommended for treatment of peanut seeds for the control of soil borne diseases (Weller, 1988). With the intention of developing an inexpensive B. subtilis inoculant that can be easily applied, an experiment was conducted in our laboratory.

Keywords

Bacillus subtilis, Carriers, Formulation.

Full Text