Tibraca limbativentris(Hemiptera: Pentatomidae) is a major pest in Neotropical rice agroecosystems. In autumn–winter, this pest takes refuge in rice stubble and in native vegetation, which allows it to re-colonize the crop during the rice growing season. However, it is still unknown whether this vegetation is a pest sink or is actually a natural trap that contributes to pest population biocontrol. Here we present information on the insect's alternative host plants, a preliminary outline of the relationship between plant phylogeny and insect abundance, and the impact that winter natural enemies have in pest population. Also, we include a proposed methodology for pest density analysis in winter hosts. Our results show significant differences in the abundance/density thatT. limbativentrisreaches in the 12 host plant species present in our study areas, with a plant-use pattern significantly related to the phylogenetic clade of Poales. Stink bug winter populations mainly comprised diapause adults, and 40% of insect digestive tracts had content. Survival ofT. limbativentriswas 56.92% in winter hosts. About mortality, 10% was due to undetermined causes and 33.08% due to entomopathogenic fungi, showing a natural regulation of the pest population. Our results suggest that native vegetation impacts winter survival ofT. limbativentris. Although these plants offer shelter, they offer a greater contribution to Integrated Pest Management: the natural regulation of winter pest populations through entomopathogenic attack. Further studies onT. limbativentrispopulation dynamics and the preservation of native areas near rice fields will be required for the development of best control practices.

中文翻译：

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原生植被对水稻蝽（Tibraca Limbativentris）检测和管理的重要性

七叶草（半翅目：蝾螈科）是新热带水稻农业生态系统的主要害虫。在秋冬季，这种害虫躲在稻茬和原生植被中，使其能够在水稻生长季节重新定殖作物。然而，尚不清楚这种植被是害虫汇还是实际上是有助于害虫种群生物控制的天然陷阱。在这里，我们提供有关昆虫替代寄主植物的信息，植物系统发育与昆虫丰度之间关系的初步概述，以及冬季天敌对害虫种群的影响。此外，我们还提出了一种用于冬季宿主害虫密度分析的方法。我们的结果显示丰度/密度存在显着差异T.limbativentris在我们研究区域存在的 12 种寄主植物中，植物使用模式与 Poales 的系统发育进化枝显着相关。蝽冬种群主要为滞育成虫，40%的昆虫消化道有含量。生存的T.limbativentris冬季寄主为 56.92%。关于死亡率，10% 是由于不明原因造成的，33.08% 是由于昆虫病原真菌造成的，显示出害虫种群的自然调节。我们的研究结果表明，原生植被影响冬季生存T.limbativentris. 尽管这些植物提供了庇护所，但它们对综合害虫管理做出了更大的贡献：通过昆虫病原攻击对冬季害虫种群进行自然调节。进一步研究T.limbativentris人口动态和保护稻田附近的原生地区将是制定最佳控制做法所必需的。