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随着栽培技术的提高和种植面积的扩大,近年我区水稻生产有了很大发展,但由于新垦荒地、盐碱滩涂种稻面积的不断扩大,稻水蝇(Ephydra macel-laria Egger)已成为荒地稻区,特别是盐碱地稻区苗期的重要害虫,使水稻生产受到较大的损失。一、危害程度及方式张掖地区现有水稻面积4万亩,其中80％以上是新垦荒地稻,这些新垦荒地大多是原来的盐碱滩涂和草湖滩,耕层土壤总盐量0.25％～1.1％,土壤pH7.8～9.2。新垦荒地稻田常有大量的泡沫、草籽、草叶、苔藓、藻类等漂浮物,适于稻水蝇的生存和繁殖、据近年在高台县宣化、罗城、黑泉、巷道、合黎乡,
With the improvement of planting techniques and the expansion of planting area, the rice production in our region has greatly developed in recent years. However, due to the continuous expansion of the reclaimed wasteland and saline-alkali matted paddy fields, the Ephydra macel-laria Egger Become a wasteland rice area, especially in saline-alkali rice seedlings of important pests, so that rice production suffered greater losses. First, the degree of harm and methods Existing Zhangye area of 40000 acres of rice, of which more than 80% is newly reclaimed wasteland rice, most of these new reclamation and wasteland is the original saline beach and Caohu Beach, tillage soil total salt 0.25% ~ 1.1%, soil pH7.8 ~ 9.2. Newly reclaimed wasteland paddy fields often have a lot of foam, grass seeds, grass leaves, moss, algae and other floating objects, suitable for the survival and breeding of rice water flies, in recent years in Gaotai County Xuanhua, Luo City, Black Springs, Lane, township,