Adhikari Rosan, Seal Dakshina R, Schaffer Bruce, Liburd Oscar E, Khan Rafia A
Tropical Research and Education Center, University of Florida, Homestead, FL 33031, USA.
Entomology and Nematology Department, University of Florida, Gainesville, FL 32611, USA.
Insects. 2023 Feb 10;14(2):175. doi: 10.3390/insects14020175.
Asian bean thrips, Bagnall, are a serious pest of vegetable crops, especially leguminous crops, across the Asian continent. In Florida, it is a new invasive pest of snap beans. In 2019, it was recorded for the first time in the United States in snap bean () fields. Another thrips species, melon thrips, Karny, is also a serious pest that affects several vegetable crops. Within-plant and within-field distribution patterns of and were determined in snap bean fields in southern Florida. The highest number of both thrips species (Asian bean thrips and melon thrips) in snap beans were in flowers, followed by leaves and pods. Both adults and immatures of these thrips exhibited regular to clumped distribution patterns in bean fields. Several statistical indices showed agreement in the distribution patterns of Asian bean thrips, melon thrips, and larvae, irrespective of sampling units and plot size, in three years of study. In most instances, the distribution of Asian bean thrips and melon thrips was aggregated. This study assessed the optimum sample size to accurately determine the population density of these thrips for management purposes. The results from this study will be useful for implementing targeted management programs against thrips pests, thereby reducing labor costs and time. This information will also help reduce agrochemical use.
亚洲豆蓟马（Bagnall）是整个亚洲大陆蔬菜作物，尤其是豆科作物的一种严重害虫。在佛罗里达州，它是食荚菜豆的一种新入侵害虫。2019年，它首次在美国的食荚菜豆（）田被记录到。另一种蓟马物种，西花蓟马（Karny），也是一种影响多种蔬菜作物的严重害虫。在佛罗里达州南部的食荚菜豆田中确定了亚洲豆蓟马和西花蓟马在植株内和田间的分布模式。食荚菜豆中这两种蓟马物种（亚洲豆蓟马和西花蓟马）数量最多的部位是花，其次是叶和豆荚。这些蓟马的成虫和若虫在菜豆田中均呈现规则分布至聚集分布模式。在三年的研究中，无论采样单位和地块大小，几种统计指标都表明亚洲豆蓟马、西花蓟马及其幼虫的分布模式具有一致性。在大多数情况下，亚洲豆蓟马和西花蓟马的分布是聚集的。本研究评估了为管理目的准确确定这些蓟马种群密度的最佳样本量。本研究结果将有助于实施针对蓟马害虫的靶向管理计划，从而降低劳动力成本和时间。这些信息也将有助于减少农用化学品的使用。
