State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
College of Life Science and Resources and Environment, Yichun University, Yichun, China.
Pest Manag Sci. 2021 Jul;77(7):3233-3240. doi: 10.1002/ps.6365. Epub 2021 Apr 6.
Plant viruses are transmitted mainly by piercing-sucking herbivores, and viral disease management relies on chemical control of vectors. Southern rice black-streaked dwarf virus (SRBSDV) is transmitted by the white-backed planthopper (WBPH), Sogatella furcifera. This study aimed to evaluate the potential of silicon (Si) amendment for reducing SRBSDV transmission.
The settling and ovipositional preferences of WBPH females decreased significantly by 14.6-43.7% for plants treated with either 0.16 g or 0.32 g SiO kg soil during SRBSDV acquisition and by 26.2-28.3% for plants treated with 0.32 g SiO kg soil during SRBSDV inoculation, compared with controls. Adding either 0.16 or 0.32 g SiO kg soil significantly reduced SRBSDV inoculation rate by 31.3% and 45.3%, respectively, and acquisition rate by 25.5% and 66.0%, respectively. Silicification was intensified more in plants treated with 0.32 g SiO kg soil than in controls. The nonprobing (np) duration increased, and the phloem sap ingestion (N4-b) duration decreased significantly in the WBPHs feeding on high-rate-Si-supplemented plants compared with control plants during both inoculation and acquisition access.
This study showed that Si amendment to rice plants decreased the WBPH settling and ovipositional preference and the SRBSDV acquisition and inoculation rates, thereby reducing SRBSDV transmission. The intensified plant silicification and the altered WBPH feeding behaviors (i.e. prolonged np and shortened N4-b) may explain the reduced SRBSDV transmission in Si-amended plants. © 2021 Society of Chemical Industry.
植物病毒主要通过刺吸式昆虫传播，病毒病的防治依赖于对媒介昆虫的化学控制。南方水稻黑条矮缩病毒（SRBSDV）由白背飞虱（WBPH）传播，褐飞虱。本研究旨在评估硅（Si）改良降低 SRBSDV 传播的潜力。
在 SRBSDV 获得期间，用 0.16 g 或 0.32 gSiO 处理的植物中，WBPH 雌虫的沉降和产卵偏好显著降低 14.6-43.7%，用 0.32 gSiO 处理的植物中，WBPH 雌虫的沉降和产卵偏好显著降低 14.6-43.7%。在 SRBSDV 接种期间，用 0.32 gSiO 处理的植物中，分别降低 26.2-28.3%。用 0.16 或 0.32 gSiO 处理土壤显著降低了 SRBSDV 的接种率 31.3%和 45.3%，获得率分别为 25.5%和 66.0%。用 0.32 gSiO 处理的植物的硅化作用比对照更强烈。与对照植物相比，在高剂量-Si 补充的植物上取食的 WBPH 的非探查（np）持续时间延长，韧皮部汁液摄入（N4-b）持续时间显著缩短。
本研究表明，向水稻植株中添加 Si 降低了 WBPH 的沉降和产卵偏好以及 SRBSDV 的获得和接种率，从而降低了 SRBSDV 的传播。植物硅化作用的增强和 WBPH 取食行为的改变（即 np 延长和 N4-b 缩短）可能解释了 Si 处理植物中 SRBSDV 传播减少的原因。© 2021 化学工业协会。
