Archives

Based on the morphological characteristics, the 30 isolates of Trichoderma spp. were segregated into 10 groups. Under fluffy mycelial growth, five groups (I, II, III, IV and V) were categorized. The isolate Nos. 3, 9, 14 and 25 had been categorized in Group No. I based on the presence of fluffy mycelial growth with poor sporulation and presence of one ring and pigmentation. Isolate No. 8 was placed in Group II having fluffy mycelial growth with poor sporulation, presence of one ring and absence of pigmentation. Group No. III comprised of isolate Nos. 6 and 24 having same characters as in isolate No. 8 except there was no ring formation. Isolate Nos. 2, 4, 7, 23 and 20 were placed in Group No. IV with characteristic fluffy mycelial growth showing moderate to abundant sporulation, one ring formation and presence of pigmentation. Isolate Nos. 1, 10, 21 and 22 were placed in Group V having all the characters as in Group IV except more than one ring formation, heavy sporulation and absence of pigmentation. Under suppressed mycelial growth again five groups viz., Group VI, VII, VIII, IX and X were categorized. Group No. VI had isolate No. 19 with characters like poor sporulation, no ring formation and presence of pigmentation. The isolate No. 27 clustered in Group VII with characters as in Group No. VI except absence of pigmentation. Group No. VIII had the isolate Nos. 12, 17 and 26 with moderate sporulation, no ring formation and pigmentation. The isolate Nos. 5, 11, 13, 18, 28 and 29 grouped in Group IX with more than one ring and presence of pigmentation. Isolate Nos. 15, 16 and 30 have been categorized in Group No. X with abundant sporulation, more than one ring formation and presence of pigmentation.
Keywords: Trichoderma, Mycelial, Pigmentation, Chlamydospore