Gambley Cherie, Nimmo Peter, McDonald Janet, Campbell Paul
Department of Agriculture and Fisheries, Brisbane 4001, Australia.
Plants (Basel). 2022 Mar 14;11(6):776. doi: 10.3390/plants11060776.
Early detection of tomato yellow leaf curl virus (TYLCV) in a previously unaffected tomato production district in Australia allowed its spread to be evaluated spatially and temporally. The population dynamics of the TYLCV vector, (silverleaf whitefly, SLW), were also evaluated. The district is a dry tropical environment with a clear break to commercial production during the summer wet season. The incidence of TYLCV within crops and its prevalence through the district was influenced by weather, location, vector movements, and the use of Ty-1 virus-resistant hybrids. Rainfall had an important influence, with late summer and early autumn rain suppressing the levels of SLW and, by contrast, a dry summer supporting faster population growth. The use of Ty-1 hybrids appears to have reduced the incidence of TYLCV in this district. There was limited use of Ty-1 hybrids during 2013, and by season end, crops had moderate levels of SLW and high virus incidence. The 2015 and early 2016 season had high SLW populations, but TYLCV incidence was lower than in 2013, possibly due to the widespread adoption of the Ty-1 hybrids reducing virus spread. This study provides valuable epidemiology data for future incursions of begomoviruses, and other viruses spread by SLW.
在澳大利亚一个此前未受影响的番茄产区对番茄黄化曲叶病毒（TYLCV）进行早期检测，有助于从空间和时间上评估其传播情况。同时还评估了TYLCV传播媒介（烟粉虱，SLW）的种群动态。该产区属于干旱热带环境，在夏季雨季期间商业生产会明显中断。作物内部TYLCV的发病率及其在整个产区的流行情况受到天气、位置、传播媒介活动以及Ty-1抗病毒杂交品种使用情况的影响。降雨有重要影响，夏末和秋初降雨会抑制烟粉虱数量，相反，干旱的夏季则有利于种群更快增长。使用Ty-1杂交品种似乎降低了该产区TYLCV的发病率。2013年期间Ty-1杂交品种使用有限，到季节结束时，作物上烟粉虱数量适中，但病毒发病率很高。2015年和2016年初烟粉虱数量很多，但TYLCV发病率低于2013年，这可能是由于Ty-1杂交品种的广泛采用减少了病毒传播。本研究为未来双生病毒以及其他由烟粉虱传播的病毒的入侵提供了有价值的流行病学数据。
