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 |
Early blight is the most devastating disease of tomato it is caused by pathogens i.e. Alternaria solani. In tropical and subtropical countries it creates hazardous effect. It is also a common problem in United Kingdom, Australia, India, Nepal and United States. It is one of the most common foliar diseases of tomatoes. The disease can occur over a wide range of climatic conditions, but is most prominent in areas with heavy dew, rainfall and high relative humidity. Every year sever disease appears in north India. Early blight disease mostly effects leaf, stem, and rotening of the apical parts of fruit is very serious and damaging symptoms. Entire tomato crop loss occurs during severe occurrence of this disease of tomato. Fourteen genotypes including one check variety of tomatoes were involved in this study for the identification of highly resistant (HR), resistant(R), moderately resistant (MR), moderately susceptible (MS) and susceptible (S) reaction of tomato genotypes under natural field condition. Screening trail was done in multiple replications during two Rabi seasons 2016-17 and 2017-18 at Vegetable Research Farm, Department of Horticulture, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India. Genotype EC-520061 was found highly resistant during both the year 2016-17 and 2017-18. Thus it was proved from our research that the genotype EC-520061 was stable and consists of highly resistant gene against early blight disease of tomato under natural field condition. However, resistant reaction was recorded in two genotypes during Rabi 2016-17. But susceptible reaction was proved to be in three genotypes during 2017-18.
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