Evaluation of different rice genotype against yellow stem borer (Scirpophaga incertulas Walker)

Abstract

The experiment was conducted in the consecutive two years 2016 and 2017 in the field conditions. As such, based on the overall mean values of two years' of investigations, the least percentage of dead-heart (1.87%) was recorded in case of Suraksha, followed by Kavya (4.50%), Lalat (5.59%), CR Dhan -303 (5.94%), CR Dhan -205 (6.77%), Sahbhagi Dhan (6.88%), CR Dhan -304 (7.02%) and Naveen (7.27%). These rice cultures were rated as promising and resistant against dead heart incidence, caused by YSB. The susceptible rice variety, TN-1 received the highest dead-heart amounting to 19.70 percent in the present studies based overall mean of two years' results. As such, based on the overall mean values of WE recorded during two years' investigations, the least percentage of white ear (3.16%) was noticed in case of Suraksha which remained at par with Kavya (4.34%), Akshay Dhan (3.46%), IR-20 (4.36%), IR-36 (4.50%), IR-64 sub-1 (4.64%) and followed by CR Dhan-304 (5.27%) CR Dhan -303 (5.78%), Lalat (6.66%) and Sahbhagi Dhan (9.63%) and all these rice genotypes received below 10 per cent white ear, caused by the stem borer, as against the highest incidence of WE was observed in the susceptible variety, TN-1 (22.71%) in the present studies. The test genotype could be arranged in descending order of: Ac Dhan (61.15 q/ha) > Advanta-801 + (59.30 q/ha) > CR Dhan -205 (52.58 q/ha) > CR Dhan -303 (51.16 q/ha) > Lalat (50.95 q/ha) > IR-36 (50.34 q/ha) > Abhisek (49.78 q/ha) in terms of grains yield and all these seven genotype remained statistically at par. TN-1 appeared as susceptible to yellow stem borer.

Comparative Efficacy of Selected Chemicals with Biopesticides against Yellow Stem Borer, Scirpophaga Incertulas (Walker) on Paddy (Oryza sativa L.)

“…The mean data of all observations regarding the efficacy of different treatments against yellow stem borer revealed that, Chlorantraniliprole 0.4% G (4.24%), the most effective among all, were similar with the findings of Omprakash et al, [5], Rani et al, [7]. Followed by Spinosad 45% SC (4.54%), which lined with the findings of Chatterjee and Mondal [8], Madhu et al, [9], Acephate 75% SP (4.94%), similar results were supported by Sharanappa et al, [1], Kumari et al, [11].…”

Biochemical factors associated with vegetative phase resistance against yellow stem borer, Scirpophaga incertulas (Walker) in land races of rice

“…The present findings are in close conformity with Punithavalli et al, (2013) who reported that the contents of biochemicals such as phenol, orthodihydroxy phenol and tannins were negatively correlated with leaf folder damage indicating that these are defensive compounds contributing towards the rice yellow stem borer resistance. Further, Elanchezhyan et al, (2017) reported that higher concentration of total phenols observed in the resistance group could be one of the factors contributing towards tolerance with antibiotic effect against yellow stem borer.…”

Balancing scientific and impact recognition on agriculture research and development in developing country

“…Researches that was conducted for varietal engineering on rice, for example, involved so many research and actors, namely genome sequencing [3,4], breeding for water pressure [5], breeding for pests [6,7], pest evaluation [8,9], and related activity in varietal dissemination and development that were done by several institutions. With such a pattern, agricultural research follows a pyramid pattern, from basic, intermediate, and applied research activities or commercialization.…”