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首页> 外文期刊>Journal of Economic Entomology >Development of a meridic diet for Hylobius transversovittatus (Coleoptera : Curculionidae) and the role of carbohydrates in feeding, growth, and survival of larvae
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Development of a meridic diet for Hylobius transversovittatus (Coleoptera : Curculionidae) and the role of carbohydrates in feeding, growth, and survival of larvae

机译：开发一种经节食性的横纹对虾（鞘翅目：Curculionidae），以及碳水化合物在幼虫的摄食，生长和存活中的作用

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摘要

The root-feeding weevil Hylobius transversovittatus Goeze (Coleoptera: Curculionidae) is used for biological control of the invasive plant purple loosestrife, Luthrum salicaria L. (Lythraceae). A simple rearing system for this weevil was developed with the goals of improving production techniques and increasing the availability of insects for field introduction. Additionally, the dietary effects of digestible and indigestible carbohydrates were explored. A meridic diet for rearing H. transversovittatus was formulated through nutritional alterations of a boll weevil, Anthonomus grandis grandis Boheman, diet. Diet attractiveness was evaluated on two levels: first, by recording the incidence of initial tunneling, and second, by estimating the larval establishment rate. The performance of test diet formulations was further assessed by measuring developmental and survival rates of H. transversovittatus. Sucrose, starch, and three types of indigestible carbohydrates were tested as components to improve diet performance. Physical properties of the diet, modified by fillers in test formulations, produced major effects on the initial tunneling of hatchlings. The establishment of hatchlings was affected by chemical properties of the diet. Increases in sucrose concentration decreased larval establishment, decreased the rate of larval development, and decreased larval survival. However, omitting sucrose from the diet, or replacing it with starch, increased mortality of first instars. In advanced stages of larval development, omitting sucrose from the diet did not significantly affect larval survival. The developmental rate of larvae was increased when the amount of digestible carbohydrate was reduced. To date, seven generations of the univoltine H. transversovittatus have been successfully produced on this new meridic diet.
机译：喂食根象鼻虫Hylobius transversovittatus Goeze（鞘翅目：Curculionidae）用于对入侵植物紫色珍珠菜Luththal salicaria L.（Lythraceae）进行生物控制。为了改进生产技术并增加田间引诱昆虫的可利用性，开发了一种用于该象鼻虫的简单饲养系统。另外，探索了可消化和不消化的碳水化合物的饮食效果。通过trans虫象鼻虫（Anthonomus grandis grandis Boheman）饮食的营养改变，制定了一种用于饲养横贯嗜血杆菌的经络饮食。饮食吸引力在两个层面上进行评估：首先，通过记录初始隧道的发生率，其次，通过估计幼虫的建立率。通过测量横贯嗜血杆菌的发育和存活率进一步评估了试验饮食制剂的性能。测试了蔗糖，淀粉和三种不易消化的碳水化合物作为改善饮食性能的成分。日粮的物理特性，经测试配方中的填充剂改性，对孵化初期的孵化产生了重大影响。幼鱼的建立受到日粮化学特性的影响。蔗糖浓度的增加降低了幼虫的形成，降低了幼虫的发育速度，并降低了幼虫的存活率。然而，从饮食中省略蔗糖，或用淀粉代替蔗糖，会增加第一龄幼虫的死亡率。在幼虫发育的晚期阶段，从饮食中省略蔗糖不会显着影响幼虫的存活。当可消化碳水化合物的量减少时，幼虫的发育率增加。迄今为止，已经在这种新的经络饮食上成功生产了七代单伏H. transversovittatus。

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