评估 Utricularia aurea(灯心草科:Lentibulariaceae)对按蚊、库蚊和埃及伊蚊(双翅目:Culicidae)幼虫阶段的食肉功效。

Ajeet Kumar Mohanty, Abhishek Govekar, Charles de Souza, Abhipsa Mohapatra, Malapati Kuppuswamy Janarthanam, Raja Vukanti, Justin J Montemarano, Praveen Balabaskaran Nina
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引用次数: 0

摘要

由于蚊子对杀虫剂产生抗药性,因此有必要探索和验证在自然栖息地控制蚊子的可持续生物策略。我们在实验室和野外环境中评估了印度次大陆、日本和澳大利亚发现的一种水生食肉植物 Utricularia aurea Lour(唇形科:Lentibulariaceae)对按蚊 Liston、库蚊 Culex quinquefasciatus Say 和埃及伊蚊 Aedes aegypti Linn(双翅目:Culicidae)4 个阶段的捕食效果。在实验室环境中,U. aurea 在第一个小时内捕食幼虫的比例最高,分别捕食了 45%、61% 和 58% 的史蒂芬斯蚊(An. stephensi)、五区库蚊(Culex quinquefasciatus Say)和埃及伊蚊(Ae. aegypti Lin)的初生幼虫。在 12 小时内,U. aurea 捕食了这 3 种蚊子中约 95% 的第一、第二和第三龄幼虫,约 80% 的史蒂芬斯蚊和埃及伊蚊第四龄幼虫,约 60% 的五步蛇第四龄幼虫。U. aurea 的捕食效果因蚊子种类和雏形而异。总的来说,捕食风险随着雏形的增大而降低。在野外环境中,16 天结束时,U. aurea 分别捕食了 76% 和 71% 的未成熟史蒂芬斯氏蚊和埃及伊蚊。我们的研究结果表明,U. aurea 可以作为一种潜在的生物控制剂,用于控制自然生境中的蚊子幼虫;不过,目前的说法还需要在各种自然生境中进行更多的调查。
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Evaluating the carnivorous efficacy of Utricularia aurea (Lamiales: Lentibulariaceae) on the larval stages of Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti (Diptera: Culicidae).

The emergence of insecticide resistance in mosquitoes necessitates the exploration and validation of sustainable biological strategies for controlling mosquitoes in their natural habitats. We assessed the predatory effect of Utricularia aurea Lour (Lamiales: Lentibulariaceae), an aquatic carnivorous plant found in the Indian subcontinent, Japan, and Australia, on 4 instars of Anopheles stephensi Liston, Culex quinquefasciatus Say, and Aedes aegypti Linn (Diptera: Culicidae), in the laboratory and field settings. In the laboratory setting, predation of larvae by U. aurea was highest during the first hour when it predated 45%, 61%, and 58% of first instars of An. stephensi, Cx. quinquefasciatus, and, Ae. aegypti, respectively, and, within 12 h, U. aurea preyed upon ~95% of the first, second, and third instars of the 3 mosquito species, ~80% of the fourth instars of An. stephensi and Ae. aegypti, and ~60% of fourth instars of Cx. quinquefasciatus. The predatory effect of U. aurea varied with mosquito species and instar. Broadly, predation risk declined with the increase of the instar size. In the field setting, at the end of 16 days, U. aurea predated 76% and 71% of the immature An. stephensi and Ae. aegypti, respectively. Our findings suggest U. aurea can be utilized as a potential biocontrol agent for controlling mosquito larvae in natural habitats; however, the current claim warrants additional investigations in a variety of natural habitats.

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