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Authors: Shekhar, Varsha
Advisor: Rai, Bimla
Title: Studies of Grain Discolouration on Rice
Publisher: Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur
Language: en
Type: Thesis
Pages: 28+vii
Agrotags: null
Keywords: Rice, Grain Discolouration, Fungi, Grain quality
Abstract: Rice (Oryza sativa L.) is one of the most important crop of the world both in terms of areas (433.8 mha) and production (481.54mt) (USDA, 2016). One out of the three people depends on rice for more than half of their daily diet. Rice is the most important staple food in Asia. More than 90% of the world’s rice is grown and consumed in Asia, where 60% of the world’s population lives. Rice accounts for between 35-60 percent of the caloric intake of three billion Asians. Grain discoloration of rice is a complex disease which deteriorates quality of grains. In the present investigation fungi, associated with discoloration of grains were identified as Fusariumsp., Aspergillus sp., Trichoderma sp.,Helminthosporium sp., Rhizhopussp., Curvulariasp. and Altenariasp. In the present study, per cent grain discolouration varied from 36.75 to 69.00. The maximum discolored grain (69 %) was recorded in Rajshree followed by BPT-5204 (57.00%) and RAU-1-16-48 (48 %). The least discolouration was observed in Boro-3 (36.75 %) variety. Detection of mycoflora was done by blotter method, agar plate method and paper towel method. Rajendra Bhagawati recorded (58%) incidence of grain discoloration while Prabhat registered minimum seed infection (30 %) in paper towel method. Santosh and Satyam recorded (83%) and (30%) of seed mycoflora in blotter paper method. In agar plate method Turanta and Gautamrecorded seed mycoflora maximum (60 %) and minimum (21%) respectively. The most wide spread seed mycoflora were Fusariumsp., Helminthosporiumsp.&Aspergillussp. found associated with almost all varieties. Sprint (Carbendazim + Mancozeb) was found highly effective (100 %) against all pathogenic seed mycoflora in-vitro. Effective seed Treatment with neem oil and Trichoderma was also effective.
Subject: Plant Pathology
Theme: Discolouration of rice grains
These Type: M.Sc
Issue Date: 2018
Appears in Collections:Thesis

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