Pest populations are mostly regulated by climate, intra- and interspecific competition, natural enemies, and host plant quality. Myzus persicae (Sulzer) (Hemiptera: Aphididae) is a widely adapted aphid in the agroecosystems and is one of the main bell pepper pests. In the present study, we determined the spatial and temporal dynamics and the regulatory factors of M. persicae populations in bell pepper crops. The number of aphids and their natural enemies were evaluated during 2 years in four commercial bell pepper fields. Myzus persicae density data were related to temperature, rainfall, and natural enemies by multiple regression analysis and were then submitted to geostatistical analysis. The density of M. persicae was higher during the plant’s reproductive growth stage. Rainfall, Chrysoperla spp., and Toxomerus spp. regulate M. persicae populations. Initial infestations of this pest occur along the edges of the fields and subsequently spread towards the center. This information is useful for integrated management programs aimed at anticipating periods of higher abundance of M. persicae and identifying arthropods to be prioritized in biological control.

中文翻译：

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甜椒作物中桃蚜的时空动态和自然死亡率因子。

害虫种群主要受气候，种间和种间竞争，天敌和寄主植物质量的调节。桃蚜（Sulzer）（半翅目：蚜虫）是在农业生态系统中广泛使用的蚜虫，是主要的甜椒害虫之一。在本研究中，我们确定了灯笼椒作物中桃蚜的种群的时空动态和调控因素。在两年内，在四个商业甜椒田中评估了蚜虫及其天敌的数量。通过多重回归分析，将桃蚜的密度数据与温度，降雨量和天敌相关，然后提交给地统计分析。百日草的密度在植物的生殖生长阶段较高。降雨，Chrysoperla属和Toxomerus属。调节桃蚜的种群。该害虫的最初侵害发生在田间边缘，然后向中心蔓延。该信息对于旨在预测桃蚜高丰度时期并确定节肢动物在生物防治中应优先考虑的综合管理计划很有用。