Carabid beetles (Coleoptera: Carabidae) are important biocontrol agents of insect pests and weeds worldwide. Despite this, few studies have investigated weed seed-consuming carabids in Latin America. We studied the relationship between the abundance of weed plants and the population size of carabids in five agroecosystems located in four municipalities (Jaboticabal, Guaíra, Gavião Peixoto, and Descalvado) in northeastern São Paulo state, Brazil. The weed plants comprised a strip of weedy vegetation between a forest fragment, a soybean/maize field, or an orange orchard. Carabid beetles and weeds were sampled with pitfall traps and a square metal frame, respectively, and multiple regression analysis was used to associate the carabids and weed plants. Of the 921 individuals of 18 carabid species captured, Abaris basistriata Chaudoir, Selenophorus seriatoporus Putzeys, Pentacomia cupricollis (Kollar), and Tetracha brasiliensis (Kirby) were among the most abundant. Regarding weeds, 27 species from 11 families were identified, mostly members of the families Asteraceae and Poaceae. This study indicated that weed species can contribute to population increases of predominantly granivorous and predatory carabid beetles. The family Poaceae showed the highest association with increases in populations of carabid beetles. Cenchrus echinatus L., Melinis repens (Willd.) Zizka, and Urochloa decumbens (Stapf) (Poaceae), Chamaesyce hirta (L.) Millsp. (Euphorbiaceae), Cyperus rotundus L. (Cyperaceae), and Richardia brasiliensis Gomes (Rubiaceae) were most frequently correlated with carabids. These findings suggest lines of research on carabids that consume weed seeds and on weeds that provide refuge for carabids. Progress in these areas is essential for sustainable weed management.

中文翻译：

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与甲虫种群增加相关的杂草植物物种


甲虫（鞘翅目：Carabidae）是全世界害虫和杂草的重要生物防治剂。尽管如此，很少有研究调查拉丁美洲食用杂草种子的 carabids。我们研究了位于巴西圣保罗州东北部四个城市（Jaboticabal、Guaíra、Gavião Peixoto 和 Descalvado）的五个农业生态系统中杂草植物丰度与 carabids 种群规模之间的关系。杂草植物由森林碎片、大豆/玉米田或橙园之间的一条杂草植被组成。分别用陷阱和方形金属框架对甲虫和杂草进行采样，并采用多元回归分析将甲虫和杂草植物联系起来。在捕获的 18 种焦疹物种的 921 个个体中，Abaris basistriata Chaudoir、Selenophorus seriatoporus Putzeys、Pentacomia cupricollis （Kollar） 和 Tetracha brasiliensis （Kirby） 是最丰富的。关于杂草，确定了 27 个科的 11 种，主要是菊科和禾本科的成员。这项研究表明，杂草物种会导致主要为花岗和捕食性甲虫的种群增加。禾本科与甲虫种群增加的相关性最高。Cenchrus echinatus L.， Melinis repens （Willd.）Zizka 和 Urochloa decumbens （Stapf） （禾本科），Chamaesyce hirta （L.） Millsp.（大戟科）、Cyperus rotundus L. （莎草科） 和 Richardia brasiliensis Gomes （茜草科） 与甲虫的相关性最为明显。这些发现表明了对食用杂草种子的 carabids 和为 carabids 提供庇护所的杂草的研究路线。这些领域的进步对于可持续的杂草管理至关重要。