Effect of alfalfa downy mildew (Peronospora aestivalis) infection on the growth and development of Therioaphis trifolii (Homoptera: Aphidiidae)

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2024-08-19 DOI:10.1016/j.cropro.2024.106905

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引用次数: 0

Abstract

Downy mildew disease, which is caused by Peronospora aestivalis (Mastigomycotina: Peronosporaceae) and the spotted alfalfa aphid Therioaphis trifolii (Hemiptera: Aphididae), affects Medicago sativa (alfalfa) production. P. aestivalis and T. trifolii frequently occur together under natural conditions. In this study, alfalfa-P. aestivalis-T. trifolii were used as the research objects to explore the effects of different degrees of P. aestivalis infection on the growth and reproduction of T. trifolii, and the life table of T. trifolii population was constructed based on the fecundity parameters. The results revealed that alfalfa downy mildew infection had a significant effect on T. trifolii population. T. trifolii fed on mildly infected alfalfa plants exhibited the longest life span (18.9 d) and the highest number of nymphs (30.6) compared to those fed on alfalfa in other treatments. In terms of population life table parameters, the intrinsic rate of increase (0.626) and finite rate of increase (1.869) of T. trifolii fed on moderately infected alfalfa were the highest, and the generation time (8.310) and population doubling time (1.108) were the shortest, indicating that moderately infected alfalfa are conducive to T. trifolii population development. This study provides insights into the effects of alfalfa downy mildew on the main reproductive parameters and population of T. trifolii on M. sativa.

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苜蓿霜霉病（Peronospora aestivalis）感染对三叶蓟马（同翅目：蚜虫科）生长和发育的影响

霜霉病是由 Peronospora aestivalis（乳霉菌纲：Peronosporaceae）和斑点苜蓿蚜 Therioaphis trifolii（半翅目：蚜科）引起的，会影响紫花苜蓿（Medicago sativa）的产量。在自然条件下，P. aestivalis 和 T. trifolii 经常同时出现。本研究以紫花苜蓿-P. aestivalis-T. trifolii 为研究对象，探讨了不同程度的 P. aestivalis 感染对 T. trifolii 生长和繁殖的影响，并根据繁殖力参数构建了 T. trifolii 种群生命表。结果表明，苜蓿霜霉病感染对 T. trifolii 的种群数量有显著影响。与其他处理的苜蓿相比，被轻度感染的苜蓿植株上的 T. trifolii 寿命最长（18.9 d），若虫数最多（30.6）。在种群生命表参数方面，饲喂中度感染苜蓿的三裂叶蝉的内在增长率（0.626）和有限增长率（1.869）最高，世代时间（8.310）和种群加倍时间（1.108）最短，表明中度感染苜蓿有利于三裂叶蝉种群的发展。本研究有助于深入了解苜蓿霜霉病对三叶蓟马主要繁殖参数和种群数量的影响。

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

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.