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甘蔗异背长蝽(Ischnodemus sacharivorus)是南方蔗区的主要害虫。其成虫若虫均潜居于叶鞘内侧及心叶中吸取蔗汁,影响甘蔗的正常生长,降低糖分、减少产量。尤以第一代为害宿根蔗苗最重,严重的甚至使蔗苗枯死。由于此虫的体壁较硬,体表光滑,又潜伏在心叶和叶鞘内侧,一般乳剂农药叶面喷雾防效不佳。加之一代盛发期正值雨季,也给叶面施药带来不便。而采用克百威(呋喃丹)根区施药又因成本太高难以推广。为了寻求经济有效的药剂,我们于1987年用甲基异柳磷进行防治甘蔗长蝽的试验,取得较理想的结果。
Ischnodemus sacharivorus is a major pest in the Southern sugarcane field. Their adult nymphs are living in the leaf sheath medial and leaf suction cane juice, affecting the normal growth of sugarcane to reduce sugar, reduce the yield. Especially in the first generation of pests lodging the most serious cane seedlings, even severe cane seedlings dead. As the body wall of this worm harder, smooth surface, but also lurking in the inner leaves and leaf sheath, the general emulsion pesticide foliar spray ineffective. Coupled with the Sheng-fa period of the first generation coincided with the rainy season, but also to the foliar application inconvenience. The use of carbofuran (carbofuran) root zone drug application is difficult because of the high cost of promotion. In order to find a cost-effective agent, we used methyl isoflurane in 1987 to test and control Sugarcane long-bug, and achieved satisfactory results.