Short range dispersal of western flower thrips in field-grown French beans in Kenya
Short range dispersal of western flower thrips in field-grown French beans in Kenya
复制标题
西花蓟马在肯尼亚田间种植的菜豆中的短距离传播
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
R. Meyhöfer
中科院分区：
文献类型：
--
作者：
J. Nyasani;S. Subramanian;B. Orindi;H. Poehling;R. Meyhöfer
在田间测定了西花蓟马Frankliniella ocumentalis（Pergande）成虫的短程日扩散模式与菜豆空间分布的关系。共采集1200只成年雌蝇。在3.14 m2的中心释放点，在60株菜豆植物上释放20只成虫蓟马。分散测定的数量记录在法国豆种植在同心圆在0.9，1.8，3.6，7.2和14.4米半径从一个圆形的中心释放点为五天的蓟马。结果表明，在不同的生境条件下，黄胸叶蝉成虫的扩散比例呈稳定上升趋势。在第一个种植季节的第一天至第四天，以及在第二个种植季节的第一天至第三天，第一季扩散高峰小时为10.15h，第二季为13.15h。温度和风速与成虫的扩散活动呈正相关。[咒语]最低飞行活动是在15 °C以下，最高飞行活动是在19 °C。盛行风向不影响黄腹潜蝇成虫的扩散格局。两个季节都是夏季。成年F.在第一天，occupientalis在法国豆上移动了7.2米。在这两个季节，蓟马扩散的平均方向大多是均匀分布的（不面向一个特定的罗盘方向）周围的中心释放点。研究结果提供了一个深入了解开发综合管理战略，对害虫的基础上隔离农田，管理的替代主机周围的法国豆领域和杀虫剂的应用。
The short-range diurnal dispersal pattern of adult western flower thrips Frankliniella occidentalis (Pergande), in relation to spatial distribution of French beans, was determined in the field. A total of 1200 adult female F. occidentalis were released on 60 French bean plants with 20 adult thrips per plant at the central release point of 3.14 m2. Dispersal was determined in terms of the number of thrips recorded on French beans planted on concentric circles at 0.9, 1.8, 3.6, 7.2 and 14.4 m radii from a circular central release point for five days. Results indicated that there was a steady increase in the proportion of dispersing adult F. occidentalis from the first to the fourth day in the first planting season, and from the first to the third day in the second planting season. The peak hour for dispersal was 10.15 h in the first season while it was 13.15 h in the second season. Temperature and wind speed were positively associated with the dispersal activity of adult F. occidentalis. Minimal flight activity was at temperatures below 15 °C and peak flight activity was at 19 °C. The prevailing wind direction did not influence the dispersal pattern of adult F. occidentalis in both seasons. Adult F. occidentalis moved up to 7.2 m on French beans on the first day. In both seasons, the mean direction of thrips dispersal was mostly uniformly distributed (not oriented to a particular compass direction) around the central release point. The results provide an insight into developing integrated management strategies against the pest based on isolation of farm fields, management of alterative hosts around French bean fields and insecticide application.