一代二化螟是早稻苗期主要害虫。由于越冬场所不一,螟虫发育不整齐,蛾期拉得较长。即:一代见蛾至终见日为35天,盛蛾期达15天以上;尤其近年大面积种植杂交早稻,导致发蛾始盛期在移栽前,螟卵既产于秧苗上,也产于本田中,早栽早稻是重点,占全代卵量70%,迟栽早稻田卵量占5%,仍可造成一定的为害。 The second generation rice stem borer is the main pest in early seedling stage. Due to the different places of overwintering, stem borers are not well-developed and the larvae are prolonged. That is: the first generation of moths to see the end of the day for 35 days, Sheng moths up to 15 days or more; especially in large areas of hybrid rice in early years, leading to the initial stage of hair moths before transplanting, In Honda, the early planting of early rice is the key, accounting for 70% of the entire generation of eggs, late rice planted in early rice fields accounted for 5% of the eggs, can still cause some damage.