ORIGINAL ARTICLE
Growth characteristics of Fusarium spp. causing wilt disease in Psidium guajava L. in India
1
Department of Biotechnology, MITS University, Laxmangarh-332311, Rajasthan
2
Central Institute for Subtropical Horticulture, Lucknow-227017, UP, India
Corresponding author
Gupta Vijai Kumar
Department of Biotechnology, MITS University, Laxmangarh-332311, Rajasthan
Department of Biotechnology, MITS University, Laxmangarh-332311, Rajasthan
Journal of Plant Protection Research 2010;50(4):452-462
KEYWORDS
TOPICS
ABSTRACT
Fusarium oxysporum f. sp. psidii and F. solani, causal agents of wilt in guava are highly variable pathogens. This study was conducted on cultural and physiological (temperature and pH) characters. The data revealed that maximum mycelial growth was obtained in potato dextrose agar as semi-solid media i.e. 78.00 mm for F. oxysporum f. sp. psidii; 73. 83 mm for F. solani, while malt extract broth as liquid broth media i.e. 1 385 mg mycelia for F. oxysporum f. sp. psidii; 1491 mg for F. solani. Maximum sporulation was recorded in oatmeal agar and mycological broth. The optimum temperature and pH for growth of both Fusarium spp. isolates was 28°C and 5.5. The isolates differed in their colony growth; mycelial mass, macro-conidia, and micro-conidia produced. These variations were characters of each of the isolates with respect to cultural and physiological characters.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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