National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Collar rot of Indian bean caused by Sclerotium rolfsii Sacc. is exerting a major threat on Indian bean growers in South Gujarat. The initiation of the disease was first noticed after 10 and 15 days of sowing in susceptible variety GNIB-21 which was grown on 11st Oct. and 12nd Oct. of 2017-18 and 2018-19, respectively. Since then, there was linear progress of the disease during both the seasons. The disease appeared 2.6% at initial stage 44th SMW and reached highest 37.2% at maturity 3rd SMW during 2017-18. In 2018-19, disease appeared 2.75% at initial stage 44th SMW and reached highest 38.47% at maturity 3rd SMW. However in pooled of two years, the first symptom of collar rot was recorded on 44th SMW (2.6%) and reached to 3rd SMW (37.2%). Correlation coefficient study between weather parameters and disease incidence indicated that all the parameters jointly played an important role in the development of collar rot disease. Moreover, morning and afternoon 5cm and 10cm depth soil temperature, soil moisture 5cm and 10cm were found to play important role in the disease development. Co-efficient of determination, R2-value i.e., 0.675, 0.954 and 0.881 percent were found high during 2018, 2019 and pooled of two year, respectively. These high R2-value indicating a strong association between percent disease incidence to weather parameters.
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