Population dynamics of rice planthoppers, Nilaparvata lugens and Sogatella furcifera (Hemiptera, Delphacidae) in Central Vietnam and its effects on their spring migration to China
Population dynamics of rice planthoppers, Nilaparvata lugens and Sogatella furcifera (Hemiptera, Delphacidae) in Central Vietnam and its effects on their spring migration to China
复制标题
越南中部稻飞虱、褐飞虱和白背飞虱（半翅目、飞虱科）种群动态及其对春季向中国迁徙的影响
DOI：
10.1017/s0007485316001024
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发表时间：
2017-06-01
影响因子：
1.9
通讯作者：
Zhai, B. -P.
中科院分区：
文献类型：
--
作者：
Hu, G.;Lu, M. -H.;Zhai, B. -P.
稻飞虱（Nilaparvata lugens）和稻飞虱（Sogatella furcifera）种群在亚洲周期性爆发。预测RPH的种群动态和确定其来源地对中国这些迁徙有害生物的管理至关重要，但中国温带和亚热带地区的迁徙来源尚不清楚。特别是，由于缺乏来自越南中部和老挝的潜在来源地区的研究数据，尚未对它们在3月和4月早期迁移到中国进行探索。本研究对2012年和2013年在越南和华南地区的褐衣螨和糠衣螨的种群动态和迁徙路径进行了研究。轨迹模型显示，2012年和2013年3月和4月，RPH从越南中部水稻成熟的源区向红河三角洲和华南地区迁移。早期移民来自越南中南部（北纬14-16度），但后来大多数来自越南中北部（北纬16-19度）。利用广义线性模型对合浦地区1977-2013年4月气象和捕光器数据进行分析发现，1月份越南中南部地区移民数量随降水增加而增加，而中北部地区移民数量随降水减少而减少。这些结果确定了RPH起源于越南中部越冬地区，而不是越南最南部地区。冬季降水，而不是温度，是决定RPH迁移数量的最重要因素。基于它们在越南中部相似的种群动态和低种群密度，我们进一步推测RPH迁移是为了追踪短暂的食物资源，同时避免捕食者。迁移似乎不是由种间竞争、过度拥挤或宿主退化引起的。尽管如此，furcifera在华南比N. lugens更早建立种群，可能是为了补偿种间竞争。我们提供了新的信息，可以帮助预测这些迁徙害虫的爆发和实施控制措施。
Rice planthopper (RPH) populations of Nilaparvata lugens and Sogatella furcifera periodically have erupted across Asia. Predicting RPH population dynamics and identifying their source areas are crucial for the management of these migratory pests in China, but the origins of the migrants to temperate and subtropical regions in China remains unclear. In particular, their early migration to China in March and April have not yet been explored due to a lack of research data available from potential source areas, Central Vietnam and Laos. In this study, we examined the population dynamics and migratory paths of N. lugens and S. furcifera in Vietnam and South China in 2012 and 2013. Trajectory modeling showed that in March and April in 2012 and 2013, RPH emigrated from source areas in Central Vietnam where rice was maturing to the Red River Delta and South China. Early migrants originated from Southern Central Vietnam (14-16 degrees N), but later most were from Northern Central Vietnam (16-19 degrees N). Analysis of meteorological and light-trap data from Hepu in April (1977-2013) using generalized linear models showed that immigration increased with precipitation in Southern Central Vietnam in January, but declined with precipitation in Northern Central Vietnam in January. These results determined that the RPH originate from overwintering areas in Central Vietnam, but not from southernmost areas of Vietnam. Winter precipitation, rather than temperature was the most important factor determining the number of RPH migrants. Based on their similar population dynamics and low population densities in Central Vietnam, we further speculated that RPH migrate to track ephemeral food resources whilst simultaneously avoiding predators. Migrations do not seem to be initiated by interspecific competition, overcrowding or host deterioration. Nevertheless, S. furcifera establishes populations earlier than N. lugens South China, perhaps to compensate for interspecific competition. We provide new information that could assist with forecasting outbreaks and implementing control measures against these migratory pests.