Biology of Thrypticus truncatus and Thrypticus sagittatus (Diptera: Dolichopodidae), Petiole Miners of Water Hyacinth, in Argentina, with Morphological Descriptions of Larvae and Pupae
Biology of Thrypticus truncatus and Thrypticus sagittatus (Diptera: Dolichopodidae), Petiole Miners of Water Hyacinth, in Argentina, with Morphological Descriptions of Larvae and Pupae
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DOI：
10.1603/0013-8746-101.6.1041
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发表时间：
2008-11-01
影响因子：
2.3
通讯作者：
Hernandez, M. Cristina
中科院分区：
文献类型：
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作者：
Hernandez, M. Cristina
正在评估作为水葫芦、凤眼莲（Eichhornia crassipes）（Martius）Solms-Laubach（Pontederiaceae）的生物防治剂的采矿蝇Thrypticus truncatus Bickel &埃尔南德斯和Thrypticus sagittatus Bickel &埃尔南德斯（双翅目：Dolichopodidae）。在实验室和阿根廷巴拉那河流域的几个水道中研究了这些物种的成虫和幼虫的行为。幼虫取食于E.粗壮的化蛹发生在矿井开口附近的一个洞穴里。描述了幼虫和蛹的外部形态、幼虫的头骨骼和气管系统。这两个物种的蛹都具有Mederinae的腹侧扁平轮廓，头部顶端有一个横向锯齿状脊被一个缺口分开。本文详细描述的矿井构成了幼虫在整个发育过程中生活的微生境，并获得食物和保护。这两个物种都是活跃的，从春天到秋天结束在水葫芦上繁殖，并在叶柄的矿井内以幼虫越冬。这些物种的未成熟阶段之间没有明显的形态或行为差异，除了在pupelae的顶脊。这两个物种似乎在植物上占据了相同的生态位。
The mining flies Thrypticus truncatus Bickel & Hernandez and Thrypticus sagittatus Bickel & Hernandez (Diptera: Dolichopodidae) are being evaluated as biological control agents for the water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae). The behavior of adults and larvae of these species was studied in the laboratory and in several water courses of the Parana River basin, Argentina. The larvae feed on sap from feeding points scraped in the vascular bundles in the petioles of E. crassipes. Pupation occurs in a chamber dug near one of the mine's openings. External morphology of larvae and pupae, larval cephalic skeleton, and tracheal system are described. The pupae of both species have the ventrally flattened profile of the Medeterinae, with a transverse serrate ridge divided by a notch at the apex of the head. The mines, described herein in detail, constitute the microhabitat where the larvae live throughout their development, and obtain food and protection. Both species are active and reproduce on water hyacinth from spring to the end of fall, and overwinter as larvae inside the mines in the petioles. No morphological or behavioral differences were evident between the immature stages of these species, except in the apical ridges of the pupae. Both species seem to occupy the same niche on the plants.