Everglades Research and Education Center, University of Florida Institute of Food and Agricultural Sciences, 3200 E. Palm Beach Rd., Belle Glade, FL.
J Econ Entomol. 2020 Jun 6;113(3):1582-1585. doi: 10.1093/jee/toaa018.
Florida's rice stink bug complex comprises three species; Oebalus pugnax (F.), O. insularis (Stal), and O. ypsilongriseus (DeGeer), the latter two of which are invasive and exclusive to Florida within the United States. A series of surveys were conducted in 2017 and 2018 to determine the relative abundance of the three species throughout Florida's rice growing region within the Everglades Agricultural Area, in addition to comparing their seasonality within crop and noncrop habitats. Sampling occurred in commercial rice fields and adjacent transects of graminaceous noncrop hosts using sweep nets. Oebalus pugnax (52.7%) and O. insularis (61.7%) were the most abundant species in 2017 and 2018, respectively. Both species were more prevalent in rice fields compared to transects of noncrop hosts. Oebalus ypsilongriseus remained in low abundance relative to O. pugnax and O. insularis, and did not differ in numbers collected among rice and noncrop hosts. Of the noncrop hosts in transects, Panicum dichotomiflorum (fall panicum) was the most abundant across both years. This study is the first report of Oebalus species feeding on Echinochloa crus-galli (common barnyardgrass) in Florida. This study shows that the invasive O. insularis continues to increase in abundance, and has surpassed O. pugnax in terms of regional populations. These results emphasize the need for additional studies to assess the interactions among O. insularis and other Oebalus species in addition to its feeding behavior in Florida rice.
佛罗里达州的稻臭蝽复合体由三个物种组成；Oebalus pugnax（F.）、O. insularis（Stal）和 O. ypsilongriseus（DeGeer），后两者是入侵物种，仅存在于美国佛罗里达州的大沼泽地农业区。2017 年和 2018 年进行了一系列调查，以确定这三个物种在佛罗里达州大沼泽地农业区水稻种植区的相对丰度，此外还比较了它们在作物和非作物生境中的季节性。使用捕网在商业稻田和相邻的禾本科非作物宿主的横截面上进行采样。Oebalus pugnax（52.7%）和 O. insularis（61.7%）在 2017 年和 2018 年分别是最丰富的物种。与非作物宿主的横截面上相比，这两个物种在稻田中更为普遍。Oebalus ypsilongriseus 的丰度相对较低，与 O. pugnax 和 O. insularis 相比，在水稻和非作物宿主中收集的数量没有差异。在横截面上的非作物宿主中，Panuicum dichotomiflorum（秋黍）在这两年中都是最丰富的。本研究首次报道了佛罗里达州的 Oebalus 物种以 Echinochloa crus-galli（普通稗草）为食。本研究表明，入侵物种 O. insularis 的丰度继续增加，并且在区域种群方面已经超过了 O. pugnax。这些结果强调需要进行更多的研究，以评估 O. insularis 及其在佛罗里达州水稻中的取食行为与其他 Oebalus 物种之间的相互作用。
