Dempsey M, Riley D G, Srinivasan R
Department of Entomology, University of Georgia, Tifton Campus, 122?S. Entomology Dr., Tifton, GA 31793 (
Department of Entomology, University of Georgia, Tifton Campus, 122 S. Entomology Dr., Tifton, GA 31793 (
J Econ Entomol. 2017 Jun 1;110(3):875-883. doi: 10.1093/jee/tox061.
Commercial management of whitefly-transmitted Tomato yellow leaf curl virus (TYLCV) typically relies on insecticide control of whitefly vectors as a first line of defense. We quantified this effect in crop tunnel studies, with validation in a tomato field setting. Tomato yellow leaf curl virus-infected and Bemisia tabaci (Gennadius)-infested source plants were planted at the beginning of tunneled rows to serve as inoculum source, so that movement of whiteflies and TYLCV symptoms could be tracked down the length of the tunnel over time. Tunnel study results showed that proximity to the source plant was a more important factor than insecticide treatments. Insecticide-treated tomato transplants did tend to suppress whitefly incidence and slowed TYLCV movement in comparison with the untreated check; however, tomato plants planted closer to the source plant had higher incidence of whiteflies and TYLCV infection, regardless of treatment. In a large tomato plot study with a controlled inoculum source, insecticide treatments significantly reduced the spread of TYLCV. When uninhibited by insecticide treatment, 80% of the TYLCV spread was restricted to <15 m from the source plant (<11 m in the validation study), with insecticide treatment generally reducing the distance and magnitude of this spread.
烟粉虱传播的番茄黄化曲叶病毒（TYLCV）的商业化管理通常依赖于使用杀虫剂防治粉虱媒介作为第一道防线。我们在作物隧道研究中对这种效果进行了量化，并在番茄田间环境中进行了验证。在隧道行的起始位置种植感染了番茄黄化曲叶病毒且受烟粉虱（烟粉虱属）侵害的源植物作为接种源，以便随着时间的推移沿着隧道长度追踪粉虱的移动和TYLCV症状。隧道研究结果表明，与源植物的距离比杀虫剂处理更为重要。与未处理的对照相比，经杀虫剂处理的番茄移植苗确实倾向于抑制粉虱发生率并减缓TYLCV的传播；然而，无论处理如何，种植在离源植物较近位置的番茄植株粉虱发生率和TYLCV感染率更高。在一项使用受控接种源的大型番茄地块研究中，杀虫剂处理显著降低了TYLCV的传播。在未受杀虫剂处理抑制的情况下，80%的TYLCV传播局限于距离源植物<15米的范围内（在验证研究中为<11米），杀虫剂处理通常会减少这种传播的距离和幅度。
