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本文报道了对桑萎缩病的两种媒介昆虫——凹缘菱纹叶蝉和拟菱纹叶蝉的研究成果,包括其形态特征、生物学特性、天敌、防治方法和预测预报。两种菱纹叶蝉在外观上不同,拟菱纹叶蝉体较大,带褐色,而凹缘菱纹叶蝉较小,带黄绿色。它们复翅后缘都有一个三角形大斑,当两翅合拢时呈菱形纹。两者的生活史比较相似,但其生活习性有很大差异。凹缘菱纹叶蝉具杂食性(已知有23种寄主植物),和寄生转移等习性,拟菱纹叶蝉食性单一,桑是主要寄主植物。它们一年发生四代,桑园内虫口密度第一代最高,第二、三代非常低,到第四代重新回升。天敌有卵寄生蜂、虫寄生菌和很多捕食性蜘蛛。防治上用敌敌畏、敌百虫、马拉硫磷、乐果、六六六、杀螟松等,为了提高防治效果可采用虫卵胚子发育阶段进行预测预报。
This paper reports the results of the research on two vector insects, Morinda citrifolia and Pseudoterraceae, including their morphological characteristics, biological characteristics, natural enemies, control methods and prediction of mulberry atrophy. Two kinds of diamond leafhopper in appearance is different from the larger leafhopper caterpillar body, with brown, while the concave edge leafhopper smaller, yellowish green. They have a triangular trailing edge of the big spot, when the two wings folded diamond-shaped pattern. Both have similar life histories, but their life habits are quite different. Hollow diamond leafhopper with omnivorous (known to have 23 kinds of host plants), and parasitic transfer habits such as leaf miner leafhopper feeding single, mulberry is the main host plant. They occur four generations a year, Mulberry Park population density of the first generation of the highest, the second and third generation is very low, to the fourth generation to rebound again. Enemies have eggs parasitic wasps, parasitic worms and many predatory spiders. Prevention and treatment with dichlorvos, trichlorfon, malathion, dimethoate, BHC, fenitrothion, etc., in order to improve the control effect can be used to forecast the stage of development of insect eggs embryo.