荔枝蝽取食行为的研究

在越冬前和产卵期,荔枝蝽Tessaratoma papillosa Drury在寄主植物-荔枝树的花枝、嫩枝和老枝上都有取食行为。但在这两个不同时期, 其取食行为有显著差异。在越冬前,只有50%～70%的成虫在各类枝条上取食;而处于产卵期的荔枝蝽成虫,在各类枝条上,100%积极取食,且其取食前时间显著短于越冬前在同类枝条上的取食前时间。同一时期在不同枝叶上,荔枝蝽的取食行为也有显著差异。被置于嫩枝叶和花枝上的成虫取食前时间明显短于被置于老枝叶上者;在有选择的情况下,两个时期的成虫都明显地选择在花枝和嫩枝上取食。经分析测定：在不同生长时期,荔枝树的花枝和嫩枝的含水量与含氮量均较老枝叶中的高,可溶性糖含量的变化较大;组织结构也存在明显差异。

An investigation on feeding behavior of the litchi stink bug:Tessaratoma papillosa(Hemiptera:Pentatomidae)

Adult feeding of the stink bug, Tessaratoma papillosa Drury occurred on flowering, tender and tough branches of the host plant, litchi. However, their feeding behavior in their pre overwintering and reproductive stages was obviously different. 50%～70% and 100% of adults fed on all the three kinds of branches in their pre overwintering and reproductive stages, respectively. Placed on these branches, the pre feeding period of the stink bugs at pre overwintering stage was longer than that at reproductive stage. The feeding behavior of the stink bugs on different kinds of branches differed greatly. The pre feeding period of the stink bugs on flowering or tender branches was much shorter than that on tough one. The stink bugs preferred feeding flowering and tender branches in the choice test. The contents of water, nitrogen and soluble sugars in flowering and tender branches were higher than that in tough one and the content of soluble sugars in all three types of branches varied during the reproductive stage of the stink bug. Tender and flowering branches differed from tough one in morphology and histology.