Cooperband Miriam F, Wickham Jacob D, Warden Melissa L
Forest Pest Methods Laboratory, USDA-APHIS-PPQ, 1398 W. Truck Rd., Buzzards Bay, MA 02542, USA.
Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Rd., Beijing 100101, China.
Insects. 2023 Mar 11;14(3):279. doi: 10.3390/insects14030279.
A mark-release-recapture experiment was conducted to evaluate the orientation of spotted lanternfly (SLF) White (Hemiptera: Fulgoridae) nymphs when released equidistant between two trees. The experiment was repeated weekly for eight weeks in a heavily infested area with mature tree-of-heaven (Mill.) Swingle (Sapindales: Simaroubaceae) planted in rows as ornamental street trees in Beijing, China. One tree in each pair received a methyl salicylate lure, and the lure was rotated between trees every week as it aged. Two additional independent variables for each tree were also analyzed: size and SLF population density. Marked-released SLF significantly chose trees with higher SLF population density over trees with lower density populations, and they also chose larger trees significantly more than smaller trees. Population density and tree size were better predictors of attraction than lures, but when those factors were controlled, SLF significantly chose trees with methyl salicylate lures over control trees for the first 4 weeks of lure life. Wild SLF distribution was assessed weekly, revealing strong aggregation in first and second instars that diminished with development to the third and fourth instars. Thus, nymphal SLF aggregate, and orientation is strongly guided by the presence of other SLF and tree size.
进行了一项标记重捕实验，以评估斑衣蜡蝉若虫在两棵树之间等距释放时的定向情况。在中国北京一个虫害严重的地区，实验每周重复一次，持续八周，该地区成行种植着作为观赏行道树的臭椿（苦木科臭椿属）。每对树中的一棵树放置了水杨酸甲酯诱捕器，随着诱捕器老化，每周在树之间轮换。还分析了每棵树的另外两个独立变量：大小和斑衣蜡蝉种群密度。被标记释放的斑衣蜡蝉显著选择斑衣蜡蝉种群密度较高的树，而不是密度较低的树，并且它们也显著更倾向于选择较大的树而非较小的树。种群密度和树的大小比诱捕器更能预测吸引力，但当控制这些因素时，在诱捕器使用的前4周，斑衣蜡蝉显著选择放置了水杨酸甲酯诱捕器的树而非对照树。每周评估野生斑衣蜡蝉的分布情况，结果显示一龄和二龄若虫有很强的聚集性，随着发育到三龄和四龄，这种聚集性减弱。因此，斑衣蜡蝉若虫会聚集，并且定向受到其他斑衣蜡蝉和树大小的强烈引导。
