<正> Yellow stem borer (YSB) , Scir-pophaga incertulas (Walker) has become the main rice insect pest once again along the Changjiang River since 1990s. Unfortun
<正> The experiments were carried out in paddy field ofCNRRI in 1985-1989. Seedlings of the indica varietyErjiufeng were raised in a seedbed and transplantedto