Yellow stem borer (YSB), Scirpophaga incertulas Walker is considered as major pest of rice. An egg parasitoid, Trichogramma, is used for management of lepidopteran pests of rice worldwide. In order to optimize the time and number of releases of Trichogramma under field condition in Chhattisgarh plains, three different schedules of releases (each consisting of four split releases of wasps) of Trichogramma japonicum Ashmead were tested to manage YSB during rainy season 2017 and 2018 (June to October) under field condition. Each schedule was split into four releases of wasps (50,000 wasps/ha/release × four releases or 500 wasps/100 m²/release × four releases). The statistical analyses of two seasons data revealed that four split releases of T. japonicum at weekly interval on the 32^nd, 39^th, 46^th and 53^rd day after transplanting of rice had resulted the reduction of damage caused by YSB over control of 52.8% (2.51%) dead heart and 66.1% (0.62%) white ear in comparison with control (5.32% dead heart; 1.83% white ear). The results suggest that the time-specific four split releases of T. japonicum @ 50,000 wasps/ha/release × four split release can be the useful to attain biocontrol of YSB.

黄茎bore（YSB），Scripophaga incertulas incertuls Walker被认为是水稻的主要害虫。卵寄生性寄生虫Trichogramma被用于管理全世界水稻的鳞翅目害虫。为了优化在恰蒂斯加尔邦平原田间条件下的赤眼蜂的释放时间和释放数量，在2017年和2018年雨季期间，对日本赤眼蜂的三种不同的释放时间表（每个由黄蜂的四个分次释放组成）进行了测试，以管理YSB（六月至十月）。每个时间表都分为四批黄蜂（50,000公顷/公顷/每公顷×四批或500黄蜂/ 100 m ²/ release×4个版本）。对两个季节数据的统计分析表明，T的四个分裂释放。血吸虫在对32周间隔^ND，39^次，46^次和53^次水稻移栽后一天已导致损坏超过52.8％（2.51％）死心脏和66.1％（0.62％）白色控制引起YSB还原与对照组相比（5.32％的死心； 1.83％的白耳朵）。结果表明，特定时间的日本毛T四分裂释放量@ 50,000黄蜂/公顷/释放量×四个分裂释放量对实现YSB的生物防治很有用。