Rice stem borer scirpophaga incertulas

The yellow stem borer, Scirpophaga incertulas (Walker) (Lepidoptera: Pyralidae) is one of the major pests in all rice-growing regions of India. An experiment was conducted at Agricultural Research Station, Anand Agricultural University, Derol, Dist. Panchmahal, Gujarat, India during kharif(rainy) season in 2011 and 2012 to know the effect of soil and foliar application of silicon on the incidence of yellow stem borer, S. incertulas in rice.

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Rice, (Oryza sativa L.), is liable to infestation with several insect pests, from which the rice stem borer, Scirpophaga incertulas (Walker) (Lepidoptera: Pyralidae) is one of the most destructive and widely distributed throughout the india. To determine the extent of parasitization of yellow stemborer egg masses, the egg masses were randomly collected at weekly intervals depending on the availability from rice fields, and brought to the laboratory for collection of emerging parasites.

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Field trials were conducted during the kharif season of 2016 and 2017 in the farmers’ field of Kalain and Borkhola development block of Cachar district of Assam for evaluation of efficacy of insecticides and biopesticides against rice stem borer and leaf folder in the field of High Yielding Variety (HYV) rice, Ranjit. The experiment comprised of 4 treatments including the farmers practice (FP). The study revealed that, lowest mean percentage of infestation of rice stem borer and leaf folder i.e. 3.52 and 2.58 per cent was recorded after 90 days of application with 85.27 and 89.

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Field experiment was conducted at Crop Research Station, Narendra Deva University of Agriculture and Technology, Kumarganj, Faizabad, Uttar Pradeshto evaluate new molecules of insecticides, viz., Fipronil 5%SC, Imidacloprid 17.8%SL, Chlorantaniliprole 0.4G, Cartap hydrochloride 50% SP, Carbofuran 3G, Monocrotophos 36%SL and Carbosulfan 6G against yellow stem borer, Scirpophaga incertulas infesting rice during kharif, 2015-16.

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A field experiment was carried out at Integrated Farming Systems Research Station, Karamana, on rice variety Uma (MO 16) during Kharif 2017, to study the impact of new generation granular insecticides on rice yellow stem borer, Scirpophaga incertulas (Walker).

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Rice Stem borer is an important rice pest in India. In the present study, the genetic variability was analyzed among geographically isolated populations of rice yellow stem borer (YSB) from sixty locations of Odisha using ISSR marker technique. Fifty ISSR primers were screened and eleven ISSR primers were selected on the basis of clarity, usability, and reproducibility of their banding patterns. The 11 primers produced a total of 67 bright and discernible bands, all of which were polymorphic.

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Field studies on the effect of organic and inorganic sources of silicon against yellow stem borer in rice revealed the superiority of calcium silicate at 2t/ha and diatomaceous earth at 0.45t/ha in arresting stem borer damage with a record of average 5.84 – 11.97 % dead heart (DH) and 2.56 – 8.84% white ear head (WEH) as against 14.75 – 21.34 % DH and 8.35-14.93% WEH in control. At vegetative and heading stages both the treatments resulted in up to 60% and 69% decline in borer damage.

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The present investigation was conducted in summer 2018 at BCKV Teaching Farm, Mandouri, Nadia, West Bengal, to evaluate the efficacy insecticide, viz., Spinotetram 0.8% GR at different doze rates against yellow stem borer, Scirpophaga incertulas and Rice leaf folder, Cnaphalocrosis medinalis infesting rice.

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The present investigation was conducted on submergence rice variety Swarna sub-1 to study the effect of environmental factors on the incidence of yellow stem borer, Scirpophaga incertulas (Walker) during Kharif season of 2016 and 2017 at Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi. The infestation of yellow stem borer was noticed in the field from 2nd week of July to 4th week of October during both Kharif season of 2016 and 2017.

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