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２代三化螟平均每块卵为害 １１．２５个枯心丛，３４．７５个枯心株； ３代每块卵平均为害 ７．９５个白穗丛，１４．５５个白穗株。模拟为害与水稻产量损失的关系：２代Ｙ＝ｓ８０６０．５－２１８１．５Ｘ，Ｙ－水稻产量（ｋｇ／ｈｍ２），Ｘ－枯心株率，水稻耐害补偿作用明显，枯心株率与产量损失率之比１：０．２７；３代Ｙ＝７６５４．２－３９０２．２Ｘ，Ｙ－水稻产量（ｋｇ／ｈｍ２），Ｘ－白穗株率，水稻表现一定的耐害补偿能力，白穗株率与产量损失率之比１：０．５１。三化螟危害允许水平１．２８％。防治指标：２代卵块４８７５万块／ｈｍ２，３代卵块６５１９块／ｈｍ２。
On average, 2 eggs on each generation had 11.25 withered plexuses and 34.75 withered plants per egg; on average, 7.95 white spike clumps and 14.55 white spikelets per egg were observed in the third generation. The relationship between simulated damage and rice yield loss: Generation 2 Y = s8060.5-2181.5X, Y-rice yield (kg / hm2), X-withered strain rate, Yield loss ratio of 1: 0.27; Generation 3 Y = 7654.2-3902.2X, Y-rice yield (kg / hm2), X-white ear plant rate, rice performance tolerance compensation ability, The ratio of panicle rate to yield loss rate was 1: 0.51. Three stem borer hazards allowable level of 1.28%. Control indicators: 2 generation egg 487500 / hm2, 3 generation egg 6519 / hm2.