Status of spot blotch of wheat and its management under Jabalpur condition

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dc.contributor.advisorGupta, Pramod Kumar
dc.contributor.authorVishal, Kailash
dc.date.accessioned2022-10-04T06:12:21Z
dc.date.available2022-10-04T06:12:21Z
dc.date.issued2021
dc.description.abstractWheat (Triticum spp. L.) is a Poaceae family crop (Graminae). It is India's second most important cereal crop after rice and a vital staple food in the South Asian region). Wheat is one of the most widely produced and consumed cereals, providing around 20% of total energy and protein to the world's population. During the 2018-19 crop year, India produced 101.20 metric tonnes (mt) of wheat from a land area of 29.55 million hectares (mha) Uttar Pradesh typically ranks first in wheat production, with a total record output of 31.99 mt (32 percent) on a 9.79 mha area, followed by Punjab (17.61 mt (18 percent) and Madhya Pradesh 15.19 mt (18 percent).India is the world's second-largest wheat producer Bipolaris sorokiniana (Sacc.) Shoem causes wheat spot blotch disease. The wheat crop in Madhya Pradesh suffers from a number of fungal diseases, among which Bipolaris sorokiniana causes spot blotch. The pathogen attacks at all the growth stages of the crop, starting from the seedling to maturity of the plant, so it is indeed a desirable idea to work on management of spot blotch disease. With this in mind, the present research project, titled “Status of spot blotch of wheat and its management under Jabalpur conditions”, has been planned. During the rabi season of 2020, an intense roving survey was undertaken to assess the spot blotch of wheat incidence in the agro-climatic condition of Jabalpur. The average disease incidence varied from 15.77 to 23.55 per cent, according to the results of the field study. The maximum PDI (23.55%) was recorded in Mandla district, whereas the minimum PDI (15.77%) was recorded in Narsinghpur district in Madhya Pradesh. For the study of cultural and morphological variation among spot blotches of wheat isolates, pathogenic diversity among pathogen populations may give information into infections ability to cause disease in a certain location. The goal of this study was to collect data on pathogen diversity in relation to isolate aggressiveness in the agro-climatic condition of Jabalpur, as well as to assess the diversity of the pathogen population and its ability to produce severe disease. Various bio agents and chemical fungicides are tested for efficacy against the pathogen. The concentrations of bio agents and fungicides are reduced to test their efficacy against the pathogen.Bio agents and fungicides reduce the spot blotch of wheat disease incidence and disease severity by seed treatment and foliar application. Pseudomonas fluorescens (1.00%) was found to be a highly effective bio agent in seed treatments, reducing disease incidence by 62.25 percent.The most effective fungicide among all the tested fungicides was propiconazole (0.15%). It inhibited 86.58% of disease incidence. In foliar application of different bio agents and fungicides, Pseudomonas fluorescens was found to be a highly effective bio agent against the spot blotch of wheat. Disease incidence was lowest in Pseudomonas fluorescens treated plots, compared to other bio-agents, which inhibited 49.19% of disease incidence. In chemical, propiconazole fungicide was the most effective fungicide among all the tested fungicides. Propiconazole treated field plots inhibited 67.80% of disease incidence and also reduced the severity level. In terms of in-vitro efficacy of fungicides and bio agents against Bipolaris isolates, propiconazole (0.15%) treated plates had 100% growth inhibition after 7 days of inoculation. The bio agents were found to be highly effective in inhibiting the growth of Bipolaris isolates, inhibiting 40.43 percent of their growth. Revealed that the mean incidence of spot blotch of wheat was significantly positively correlated with maximum temp.(0.766), minimum temp.(0.728) and rainfall (0.170). During the flowering stage of the crop, rainfall has a significant impact on the development of disease. Bipolaris sorokiniana, associated with spot blotches of wheat, is favored by high temperatures.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810188577
dc.keywordsStatus of spot blotch of wheaten_US
dc.language.isoEnglishen_US
dc.pages91en_US
dc.publisherJNKVV, Jabalpur 2021en_US
dc.subPlant Pathologyen_US
dc.themeStatus of spot blotch of wheat and its management under Jabalpur conditionen_US
dc.these.typeM.Scen_US
dc.titleStatus of spot blotch of wheat and its management under Jabalpur conditionen_US
dc.typeThesisen_US
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