M. Kavitha ¹, K. Gopal ¹, S. K. Ahammed ¹, Y. Sreenivasulu ¹, P. Madhusudhan ¹

Affiliations
1 All India Co-ordinated Research Project on Citrus Acharya N. G Ranga Agricultural University Tirupati 51 7 502, Andhra Pradesh, IN

Abstract

Dry ischolar_main-rot of acid lime caused by Fusarium solani was effectively reduced (>70%) In pot culture studies by application of Trichoderma viride isolates (T₂ and T₄) @100 g/kg soil.

Keywords

Acid Lime, Bio-Control, Dry ischolar_main-rot, Fusarium solani, Trichoderma.

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S. K. Ahammed ¹, Rashmi Aggarwal ¹, K. D. Srivastava ¹

Affiliations
1 Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi-110012, IN

Abstract

Chaetomium globOsum Krunze ex Fr. has been identified as a potential antagonist of Bipolaris sorokiniana. (Sacc.) Shoem. Nine isolates of this antagonist have been characterized for their colon), characteristics and bioefficacy against the pathogen. Colony characters yaried among the isolates on different media. Potato dextrose agar (PDA) supported maximum growth and sporulation of C. globosum, while suppressed growth and less sporulation were obsen-ed on Czapek dox agar medi urn. Isolates Cgl, Cg6, Cg7, Cg8 and Cg9 were fast growing but produced less number of perithecia, ,vhile isolates Cg2, Cg3, Cg4 and CgS were slow growing showing profuse perithecia formation. All the nine isolates of C. globosum, when evaluated against B. sorokiniuna for their bioefficacy, inhibited growth of test pathogen ranging from 40.03 to 7.02 per cent. The slow woning isolate Cg2 and Cg4 caused maximum inhibition of mycelial growth of B. sorokiniuna.

Keywords

Bioefficacy, Bipolaris sorokiniana, Chaetomium globosum, Colony Characters.

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