International Journal of Plant Protection

N. M. Prabhavathi ¹, Y. S. Amaresh ¹, M. k. Naik ¹, S. B. Mallesh ¹, P. H. Kuchanur ²

Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, Rachipur (karnataka), IN
2 Department of Genetics and Plant Breeding, College of Agriculture, Bheemarayanagudi, Gulbarga (karnataka), IN

Abstract

Different temperatures and pH were taken to observe the radial growth and dry mycelial weight of Trichoderma spp. The radial growth of Trichoderma was maximum for all the four species i.e., T. harzianum, T. viride, T. hamatum and T. virens (90, 82, 91.3 and 85mm) at 30oC, where it was minimum in four species at 40oC (30.70, 35, 22.53 and 20 mm), respectively and dry mycelium of T. harzianum (1.05 mg), T. viride (1.83 mg), T. hamatum (2.42 mg) and T. virens (0.82 mg) were maximum at 25oC whereas, the radial growth of four isolates were maximum at pH 6 (90, 88, 92 and 91mm) in T. harzianum, T. viride, T. hamatum and T. virens, respectively. At neutral pH, radial growth of T. harzianum (89 mm), T. viride (91 mm), T. hamatum (89 mm) and T. virens (87 mm) was minimum and dry mycelium weight of T. harzianum (729 mg), T. viride (1639.67 mg), T. hamatum (798 mg) and T. virens (583.67 mg) were maximum at pH 8. It was minimum at pH 4 for T. harzianum (120 mg), T. viride (257 mg), T. hamatum (154 mg) and T. virens (262.67 mg).

Keywords

Trichoderma Spp., Radial Growth, Dry Mycelia, Temperature

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