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Rice Laxmi Disease/Green Smut Management

Rice Laxmi Disease/Green Smut Management

 

Parthasarathy, S

Ph.D., Scholar, Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore - 641003

Cultural methods 
Cultural practices often offer the opportunity to alter the environment. The condition of the host or the behaviour of the causal agent to achieve economic management of disease. The initial step for management of disease is use sclerotia free seed and at the time of harvesting the diseased plant should be removed from the field so that sclerotia do not fall on the ground.

 Crop rotation is the another important cultural practices and the N2 management is important because disease is favoured by the high Nitrogen doses so recommended dose of Nitrogen is disease prone areas is 100 kg Nitrogen/hac.

Host Resistance 
Undoubtely host resistance has been the best aid in our fight against the menace of deadly pathogen causing Green smut and breeding for disease resistance varieties is not only cost effective but also grower and consumer friendly generally the susceptible varieties of the Green smut of rice is belongs to the late maturing groups,

Tripathi & Sinha (2009) screened fifty three cultivars/entries against Green smut: only three entries, Type-3, Pant Dhan-6 and VL Dhan-85 were found to be immune.

Most of varieties viz. Pusa 44, Narendra-359, Jaya, Pant Dhan-11, Pant Dhan-12, Pant Sankar Dhan-1, PRH-10 UPRTGH-332, Improved Pusa Basmati, Pusa Sugandh-5, Pant Sankar Dhan-15, Tarawari basmati, Sugandhmati,Govind, Pant Dhan-82, VL-209, VL-154, Pant Dhan 12, Tej, Proagro 6129, PA-6201, Rajlaxmi, KRH-2, JKRH-401, Sahyadri-3, TN-1, Kalanamak, BPT-502 gave moderate resistant reaction. 

Remaining entries viz. Pant Dhan-19, Pant Dhan-10, Pant Sankar Dhan-3, Pusa Sugandh-6, Pusa Basmati, Pant Sankar Dhan-17, Super Basmati, Basmati-370, Basmati-386, Pant Dhan-16, UPR 3519-18-17, Proagro-6444, PHB-71, Sarju-52, CDRH-2, Sahyadri-2, Indira sona, GK-5002 and Ajay were found to be moderately susceptible. One cultivar (DRRH-2) was recorded as susceptible.

Chemical control 
In chemical control, toxic chemicals were put to logical use by man against pest and pathogens and these used for preventing, destroying, attracting, repelling or controlling the pathogen during production, storage and  transport.

Foliar application of Propiconazole 1ml/lit. water, Tebuconazole 1 ml/lit. water and Chlorathalonil 2g/lit water at before panicle initiation stage and repeate application after 15 days of 1st application, when emerge almost 100 percent panicles of the crop. 

 

 

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Please note that this is the opinion of the author and is Not Certified by ICAR or any of its authorised agents.