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A STUDY ON MANAGEMENT OF SHEATH ROT DISEASE OF RICE CAUSED BY Sarocladium oryzae (Sawada) Games and Hawksworth

KrishiKosh

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Title A STUDY ON MANAGEMENT OF SHEATH ROT DISEASE OF RICE CAUSED BY Sarocladium oryzae (Sawada) Games and Hawksworth
 
Creator Painkra, Dileep Kumar
 
Contributor Tiwari, P.K.
Kotasthane, A.S.
Shrivastava, Rajeev
Chandrakar, (Smt.) G.
Shukla, C.S.
 
Subject MANAGEMENT,SHEATH ROT DISEASE,RICE CAUSED,Sarocladium oryzae (Sawada) Games,Hawksworth
Plant Pathology
 
Description Sheath rot caused by Sarocladium oryzae (Sawada) Games and Hawksworth has gained the status of a major disease of rice and yield losses varies from 9.6 to 85%. The study was performed to know about current status of the disease. The sheath rot sample were collected from different location showed some variations in appearance of symptoms on leaf sheath. The nine isolates were cultured, purified by hyphal tip method and pathogenicity test were conformed. On the basis of type of growth characters the S. oryzae isolates were separated in to 4 groups, on the basis of colony margin 2 groups, on the basis of topography 2 groups and on the basis of colony pigmentation 3 groups were identified. These isolates also varied in spore size ranged from 1.78 × 1.32 µm to 15.04 × 3.81 µm. In comparison of inoculation methods study the half cooked rice grain spore coated inoculum method proved to be very effective as compare to other methods. The rice varieties named as Durgeswari, Dhawarsawa, Dokara Dokari, Jaishriram, Sonagathi, Heera, Kaya, Cholaibaba, Sangram and Karigilas showed resistance reactions (score-3) under natural conditions. Among the botanicals and medicinal plants leaf extracts Ashok leaf and Garlic bulb extracts were found inhibitory to reduced mycelial growth of S. oryzae. The maximum inhibition in mycelial growth was recorded with Trichoderma viride as compare with P. flourscence.
In the field evaluation of new fungicides for sheath rot and yield parameters of rice. The Hexaconazole 5 SC (Contaf) treatment found suitable to reduced sheath rot disease intensity (5.36%), increase the yield (6429 kgha-1) and yield parameters i.e. straw weight (8479 kgha-1), increase the healthy grain % (86%) and reduced the discolored grain % (9%) and chaffy grain % (5%) in rice.
 
Date 2016-12-16T12:28:57Z
2016-12-16T12:28:57Z
2016
 
Type Thesis
 
Identifier 122 p.
http://krishikosh.egranth.ac.in/handle/1/90569
 
Language en
 
Format application/pdf
 
Publisher Indira Gandhi Krishi Vishwavidyalaya, Raipur