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The major production constraint of rice in enhancing productivity is due to attack by pests. Rice stem borer and leaf folder are considered as economic pests and influence the yield if proper timely management practices are not adopted. In case of severe pest incidences the usage of insecticides is inevitable. Among various modes of application of insecticides, seed treatment is mostly advantageous as it is required in small amount and offers control of target pests and ensuing the establishment of healthy and vigorous plants. Hence, studies on efficacy pertaining to Chlorantraniliprole 625g/L FS (lumivia) at different concentrations along with check chemicals viz., cartap hydrochloride 4G and untreated control were evaluate at Agricultural Research Station, Vuyyuru during kharif, 2019 and rabi 2019-2020 to assess the efficacy of various test chemicals against stem borer and leaf folder infesting direct sown rice. The experimental trial was laid out with seven treatments that were replicated four times and treatments were imposed as seed dresser and broadcasted as direct sown rice. The data on per dead hearts and per cent leaf folder damaged leaves at 30, 40, 50, 60 and 70 days after sowing were recorded for both rice variety (MTU 1061) and rice hybrid (28P67). The results revealed that, among various test chemicals the treatment T4 (Chlorantraniliprole 625g/L FS @ 90 g a.i./ha) had registered highest per cent reduction of stem borer with 76.71 & 68.60 in kharif and rabi seasons of study period for rice variety. With respect to rice hybrid the per cent reduction of stem borer incidence over control was 78.19 & 65.09 per cent in kharif and rabi, 2019-2020, respectively. Similarly, the leaf folder damaged leaves were also recorded least in T4 with 61.06 & 62.96 per cent reduction over control with respect to rice variety during kharif and rabi, 2019-2020, respectively, whereas the corresponding values for rice hybrid was 61.04 and 71.64 during kharif and rabi seasons, respectively. Hence, it can be concluded that chlorantraniliprole 625g/L FS @ 90 g a.i./ha@ (lumivia) is effective as seed dresser in suppressing stem borer and leaf folder in direct seeded rice with no phytotoxicity on rice crop and no adverse effects on natural enemies.

Efficacy of chlorantraniliprole 625g/L FS (Lumivia) for the management of stem borer and leaf folder in direct seeded rice