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REVATHY, N.
- Prevalence, Symptomatology, Pathogenicity and Nutritional Requirements of Fusarium oxysporum f.sp.phaseoli Causing Fusarium Yellows of French Bean in Thandikudi
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Authors
Affiliations
1 Department of Plant Pathology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Department of Horticulture, Agricultural College and Research Institute, Madurai (T.N.), IN
1 Department of Plant Pathology, Agricultural College and Research Institute, Madurai (T.N.), IN
2 Department of Horticulture, Agricultural College and Research Institute, Madurai (T.N.), IN
Source
International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 161-166Abstract
Fusarium yellows/wilt caused by Fusarium oxysporum f.sp.phaseoli are one of the serious diseases in French bean in Thandikudi and Kodaikanal hills of Dindugal district was found to prevalent in all French beans growing areas under survey with maximum of 71.25 per cent incidence and 65.88 per cent disease severity at Thandikudi village of Dindugal district in Tamil Nadu. The pathogenicity test was conducted by artificial inoculation of test fungus into the young two leaf stage of French bean and the typical symptom were produced after twelve days after inoculation. Among the different solid and liquid media tested oat meal agar potato dextrose agar medium supported growth of the casual fungus. Fungus could grow well at a pH 4.0 and 5.0, respectively. This pathogenic fungus grew maximum when basal medium was supplemented with lactose and dextrose as carbon sources showed maximum growth and with potassium nitrate and sodium nitrate as nitrogen sources.Keywords
Fusarium oxysporum f.sp.phaseoli, Pathogenecity, Thandikudi, Symptoms.References
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- Laboratory assessment on compatibility of entomopathogenic fungus, Beauveria bassiana Balsamo-vuillemin with imidacloprid 48% FS for bhendi (Abelmoschus esculentus L. moench) seed treatment
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PDF Views:78
Authors
Affiliations
1 Department of Entomology, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, India., IN
2 Department of Entomology, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, India ., IN
3 Department of Plant Pathology, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, India ., IN
1 Department of Entomology, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, India., IN
2 Department of Entomology, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, India ., IN
3 Department of Plant Pathology, Agricultural College and Research Institute, Madurai – 625104, Tamil Nadu, India ., IN
Source
Journal of Biological Control, Vol 36, No 2 & 3 (2022), Pagination: 143 - 150Abstract
Beauveria bassiana (Balsamo-Vuillemin), an effective entomopathogenic fungi is well positioned in the biological control of insect pests for more than ten decades around the world. Its potential can be attributed to the fungus’s entry through several parts of the insect and its mode of action. But sometimes a virulent strain of B. bassiana may become ineffective because of xenobiotics and environmental factors. To enhance the efficacy of B. bassiana, which is necessary for placing it in Integrated Pest Management, the Colony Forming Unit (CFU) of B. bassiana should be compatible with xenobiotics used in crop production. The compatible concentrations of imidacloprid 48% FS (500 ppm) for B. bassiana was studied in the laboratory condition and results revealed low per cent growth inhibition (21.25%) and maximum radial growth (1.46 cm) at 15 Days After Inoculation (DAI). The inhibition of colony growth was reduced by treating the bhendi seeds with B. bassiana and imidacloprid 48 % FS at a time interval of four hours which showed high mean colony growth (51.12).Keywords
Beauveria bassiana, compatibility, imidacloprid 48% FS, seed treatmentReferences
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