Lactic acid impairs Varroa destructor grip skill: fitness costs and effects on behaviour under artificial conditions

IF 5.6 1区农林科学 Q1 ENTOMOLOGY

Entomologia Generalis Pub Date : 2023-12-11 DOI:10.1127/entomologia/2023/1975

Caroline Vilarem, Vincent Piou, Solène Blanchard, Catherine Armengaud, Fanny Vogelweith, Angélique Vétillard

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Abstract

Varroa destructor is one of the major parasites threatening the Western honeybee Apis mellifera if not managed. Yet, sustainable treatments are rare due to the difficulty to impact the mite without disturbing the host. One current soft acaricide used by beekeepers is lactic acid, although its way of action on the parasite remains poorly understood. We undertook the first investigation about lactic acid on V. destructor at the individual level under artificial conditions. We found that lactic acid does not kill V. destructor but rather interferes with its attachment skills. In particular we focused on its arolia, mite’s soft pads, and highlighted shape and fluid modifications induced by lactic acid. We also analysed fitness costs and behavioural effects of impaired attachment due to lactic acid on mites. We observed a reduced locomotion as well as a potential lower reproduction but no impact on nutrition. Even if conducted under artificial conditions, these results significantly improve our understanding of lactic acid effect on the parasite’s biological abilities. They also provide new perspectives to apply differently this organic acid in the field against V. destructor.

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乳酸损害瓦罗亚破坏者的抓握技能:在人工条件下的适应性成本和对行为的影响

破坏瓦螨是威胁西方蜜蜂的主要寄生虫之一，如果不加以控制。然而，由于难以在不干扰宿主的情况下影响螨虫，可持续的治疗方法很少见。目前养蜂人使用的一种软杀螨剂是乳酸，尽管它对寄生虫的作用方式仍然知之甚少。本文首次对人工条件下个体水平上的乳酸含量进行了调查。我们发现乳酸不会杀死V. destructor，而是干扰它的附着技能。我们特别关注了它的花蕊，螨的软垫，并强调了乳酸引起的形状和流体变化。我们还分析了由于乳酸对螨虫造成的依恋受损的适应性成本和行为影响。我们观察到运动能力下降，繁殖能力也可能下降，但对营养没有影响。即使在人工条件下进行，这些结果也显著提高了我们对乳酸对寄生虫生物能力影响的理解。这也为该有机酸在田间抗V. destructor的应用提供了新的视角。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Entomologia Generalis 生物-昆虫学

CiteScore

7.10

自引率

18.80%

发文量

审稿时长

>12 weeks

期刊介绍： Its scope covers all aspects of basic and applied research dealing with insects and more broadly with arthropods inhabiting wild, agricultural and/or urban habitats. The journal also considers research integrating various disciplines and issues within the broad field of entomology and ecology. Entomologia Generalis publishes high quality research articles on advances in knowledge on the ecology and biology of arthropods, as well as on their importance for key ecosystems services, e.g. as biological control and pollination. The journal devotes special attention to contributions providing significant advances (i) on the fundamental knowledge and on sustainable control strategies of arthropod pests (including of stored products) and vectors of diseases, (ii) on the biology and ecology of beneficial arthropods, (iii) on the spread and impact of invasive pests, and (iv) on potential side effects of pest management methods. Entomologia Generalis welcomes review articles on significant developments in the field of entomology. These are usually invited by the editorial board, but proposals may be sent to the Editor-in-Chief for preliminary assessment by the editorial board before formal submission to the journal. The journal also considers comments on papers published in Entomologia Generalis, as well as short notes on topics that are of broader interest.