Simulation Modelling of Potato Virus Y Spread in Relation to Initial Inoculum and Vector activity
Simulation Modelling of Potato Virus Y Spread in Relation to Initial Inoculum and Vector activity
复制标题
马铃薯病毒 Y 传播与初始接种量和载体活性相关的模拟模型
DOI：
10.1016/s2095-3119(19)62656-0
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Jason ROSE
中科院分区：
文献类型：
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作者：
Andrew GALIMBERTI;Andrei ALYOKHIN;Hongchun QU;Jason ROSE
马铃薯Y病毒（PVY）是一种由许多蚜虫传播的非持久性病毒，对马铃薯生产造成重大损害。我们构建了一个空间上明确的模型，模拟PVY传播在马铃薯领域，并使用它来调查可能的影响，传输效率，初始接种水平，载体行为，载体丰度，和时间的峰值载体活动对PVY发病率在模拟生长季节结束。较低的PVY发病率在种植种子导致较低的病毒感染在赛季结束。然而，当有效PVY载体的群体高时，即使初始病毒接种物低，也会发生显著的PVY传播。非定殖蚜虫是更重要的PVY传播相比，定殖蚜虫，特别是在高密度。非定殖蚜虫的数量在赛季初的高峰期导致最高数量的受感染的植物在赛季结束时，而中期和后期的高峰期造成相对较少的病毒传播。我们的研究结果强调了整合不同技术的重要性，以防止PVY感染植物的数量超过经济上可接受的水平，而不是试图控制马铃薯田内的蚜虫。这种管理计划应在生长季节的早期实施。
Potato virus Y (PVY) is a non-persistent virus that is transmitted by many aphid species and causes significant damage to potato production. We constructed a spatially-explicit model simulating PVY spread in a potato field and used it to investigate possible effects of transmission efficiency, initial inoculum levels, vector behavior, vector abundance, and timing of peak vector activity on PVY incidence at the end of a simulated growing season. Lower PVY incidence in planted seed resulted in lower virus infection at the end of the season. However, when populations of efficient PVY vectors were high, significant PVY spread occurred even when initial virus inoculum was low. Non-colonizing aphids were more important for PVY spread compared to colonizing aphids, particularly at high densities. An early-season peak in the numbers of noncolonizing aphids resulted in the highest number of infected plants in the end of the season, while mid- and late-season peaks caused relatively little virus spread. Our results highlight the importance of integrating different techniques to prevent the number of PVY-infected plants from exceeding economically acceptable levels instead of trying to control aphids within potato fields. Such management plans should be implemented very early in a growing season.