MOVEMENT OF PLANT-PATHOGENS IN THE CROP CANOPY
MOVEMENT OF PLANT-PATHOGENS IN THE CROP CANOPY
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DOI：
10.1098/rstb.1983.0075
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发表时间：
1983-01-01
影响因子：
6.3
通讯作者：
LEGG, BJ
中科院分区：
文献类型：
--
作者：
LEGG, BJ
植物病原体释放的许多孢子都沉积在离其来源几米的地方。该区域内的分布模式影响疾病的传播速度，也控制着离开树冠并有助于远距离传播的孢子数量。因此，这将是有价值的，发展一个理论来描述孢子在作物冠层内的运动，并解释气流，作物结构，以及孢子释放的高度和方式的影响。传统的扩散理论在作物中使用时会产生严重的错误，而随机行走理论，其中单个粒子的轨迹被模拟，提供了一个有希望的替代方案。速度的3个分量被生成为马尔可夫序列，具有与欧拉风场相关的平均统计数据，并具有正确的拉格朗日时间尺度。这一理论可以很容易地将孢子在阵风中的释放，孢子分布的一些影响进行了探讨。
Many spores released by plant pathogens are deposited within a few meters of their source. The distribution pattern within this zone influences the rate of spread of disease, and also controls the number of spores that leave the canopy and contribute to long-range dispersal. It would thus be valuable to develop a theory to describe the movement of spores within crop canopies, and explain the effects of airflow, crop structure, and height and mode of spore release. Conventional diffusion theory gives serious errors when used within a crop, and a random-walk theory, in which individual particle trajectories are simulated, provides a promising alternative. The 3 components of velocity are generated as Markov sequences with mean statistics that relate to the Eulerian windfield, and with correct Lagrangian times scales. This theory can readily incorporate the release of spores in gusts, and some implications for spore distribution are explored.