IN VITRO EVALUATION OF BOTANICALS, BIO-AGENTS AND FUNGICIDES AGAINST Alternaria alternata CAUSING MOULDY CORE, CORE ROT OF APPLE

HANS RAJ¹*, J.N. SHARMA^2
1ICFRE- Advanced Research Centre for Bamboo and Rattan, Aizawl Mizoram, 796001, India
²Department of Mycology and Plant Pathology, College of Horticulture, Dr. Y.S. Parmar University of Horticulture and Forestry, Solan 173230, Himachal Pradesh, India
* Corresponding Author : hrajmandi@gmail.com

Received : 25-10-2017     Accepted : 29-10-2017     Published : 30-10-2017
Volume : 9     Issue : 49       Pages : 4835 - 4840
Int J Agr Sci 9.49 (2017):4835-4840

Keywords : Alternaria alternata, apple, botanicals, bio-agents, core rot, fungicides
Academic Editor : Bajaj Gagan
Conflict of Interest : None declared
Acknowledgements/Funding : The authors are grateful to the Professor and Head, Department of Mycology and Plant Pathology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh, India for providing research facilities
Author Contribution : All the research work in laboratory was carried out by the author under the guidance of co author

Mouldy core, core rot of apple caused by Alternaria alternata has emerged an economically important disease causing direct losses in the field and storage. Bio-efficacy of seven plant extracts, plant oils, bio-agents, systemic fungicides and non systemic fungicides were evaluated under in vitro conditions against the causal agent of mouldy core, core rot. It is evident from the data that among the plant extracts Dodonia viscosa showed the maximum inhibitory effect (66.55%). Among the plant oils Cinnamomum camphora oil showed the maximum inhibitory effect (8.74%). Among the bio-agents Trichoderma hamatum exhibited maximum mycelial growth inhibition (55.13%). Among the systemic fungicides, difenoconazole showed maximum inhibition in conidial germination (93.50%) with no conidia germination at 250 ppm concentration and 100 percent inhibition of mycelia growth in all the test concentration. Among the non systemic fungicides iprodione + carbendazim showed the maximum inhibition in conidial germination (86.02%) and mycelia growth inhibition (82.09%)) of the pathogen.

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