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凌海市地处辽西走廊咽喉地，是商品粮基地县 (市 )。 1962年洪水后沿大凌河畔的根土蝽 (Stibaropus formosanus Takado et Yanagihara)日趋严重， 1974年后面积扩大。 1984年全市普查，根土蝽为害面积 2 858.4 hm2，其中新庄子镇 470.8 hm2，减产 70％～ 80％，有的地块颗粒无
Linghai City, located in the throat of Liaoxi Corridor, is a commodity grain base county (city). Stigaopus formosanus Takado et Yanagihara along the Daling River after the flood in 1962 is becoming more and more serious and its area expanded after 1974. 1984 census of the city, root bug damage area of 2 858.4 hm2, of which 470.8 hm2 Xinzhuangzi Town, cut 70% to 80%, some of the block particles without