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Wireworm (Coleoptera: Elateridae) Species Composition and Management in Sweet Potato Grown in North Florida Using Chemical Insecticides and Entomopathogenic Nematodes
Environmental Entomology ( IF 1.7 ) Pub Date : 2020-10-14 , DOI: 10.1093/ee/nvaa113
Dakshina R Seal 1 , Anil B Baniya 2 , Ruhiyyih Dyrdahl-Young 2 , Robert C Hochmuth 3 , Norman C Leppla 2 , Daniel K Fenneman 4 , Rhoda (De) T Broughton 3 , Peter DiGennaro 2
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Wireworms are immature stages of click beetles (Coleoptera: Elateridae) and are considered a serious threat to sweet potato production in the southern United States. The major wireworm species collected in North Florida sweet potato fields in 2017 and 2018 were Conoderus scissus, C. rudis, C. amplicollis, and C. falli. These species vary in their behavior and biology. During a 2-yr study period, we conducted two insecticide field trials using eleven insecticides belonging to organophosphates, neonicotinoids, pyrethroids, and botanical classes, and three field trials using entomopathogenic nematode (EPN) species to control wireworms. In 2017, all insecticide treatments significantly reduced new feeding holes and total holes (old + new + other) as compared to the untreated control. In 2018, the result was similar with a few variations. In both years, all insecticides showed a percentage reduction in wireworm damage holes (2017: 34.88-96.19%; 2018: 12.38-97.02%) with the highest by Regent. In the EPN field study, one application of EPN near planting significantly reduced soil insects. In a laboratory study conducted at the Tropical Research and Education Center, UF-IFAS, chlorpyrifos caused higher percentage mortality of C. rudis (55.5%) than C. scissus (22.2%). At the present experiment rates, none of the insecticides caused the mortality of C. amplicollis. Heterorhabditids strain 'FL-2122' was more susceptible to chlorpyrifos than other strains of EPN.

中文翻译:

使用化学杀虫剂和昆虫病原线虫在北佛罗里达种植的甘薯中的线虫(鞘翅目:Elateridae)物种组成和管理

线虫是点击甲虫(鞘翅目:Elateridae)的未成熟阶段,被认为是美国南部红薯生产的严重威胁。2017 年和 2018 年在北佛罗里达州甘薯田收集的主要线虫种类为 Conoderus scissus、C. rudis、C.amplicolli 和 C. falli。这些物种的行为和生物学各不相同。在为期 2 年的研究期间,我们使用属于有机磷、新烟碱类、拟除虫菊酯和植物类的 11 种杀虫剂进行了两次杀虫剂田间试验,以及使用昆虫病原线虫 (EPN) 物种控制线虫的三项田间试验。2017 年,与未处理对照相比,所有杀虫剂处理显着减少了新进料孔和总进料孔(旧 + 新 + 其他)。2018 年的结果相似,但有一些变化。这两年,所有杀虫剂都显示线虫损伤孔的百分比减少(2017 年:34.88-96.19%;2018 年:12.38-97.02%),其中 Regent 最高。在 EPN 实地研究中,在种植附近施用一次 EPN 显着减少了土壤昆虫。在热带研究和教育中心 UF-IFAS 进行的一项实验室研究中,毒死蜱导致 C. rudis (55.5%) 的死亡率高于 C. scissus (22.2%)。在目前的实验速率下,没有一种杀虫剂会导致 C. amplicollis 死亡。Heterorhabditids 菌株“FL-2122”比其他 EPN 菌株对毒死蜱更敏感。在种植附近施用一次 EPN 显着减少了土壤昆虫。在热带研究和教育中心 UF-IFAS 进行的一项实验室研究中,毒死蜱导致 C. rudis (55.5%) 的死亡率高于 C. scissus (22.2%)。在目前的实验速率下,没有一种杀虫剂会导致 C. amplicollis 死亡。Heterorhabditids 菌株“FL-2122”比其他 EPN 菌株对毒死蜱更敏感。在种植附近施用一次 EPN 显着减少了土壤昆虫。在热带研究和教育中心 UF-IFAS 进行的一项实验室研究中,毒死蜱导致 C. rudis (55.5%) 的死亡率高于 C. scissus (22.2%)。在目前的实验速率下,没有一种杀虫剂会导致 C. amplicollis 死亡。Heterorhabditids 菌株“FL-2122”比其他 EPN 菌株对毒死蜱更敏感。
更新日期:2020-10-14
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