Dispersal of the cabbage root fly
Dispersal of the cabbage root fly
复制标题
卷心菜根蝇的传播
DOI：
--
复制
发表时间：
1975
期刊：
影响因子：
--
通讯作者：
G. Skinner
中科院分区：
文献类型：
--
作者：
S. Finch;G. Skinner
总结
1971- 1973年，在韦尔斯本进行了释放-再捕获试验，测定了野生和养殖甘蓝根蝇Erioischia brassicae的扩散率。这些实验主要涉及成年后的头7天。从该地区9个地点释放的苍蝇被黄色的水陷阱重新捕获。
传播受到风、雨和苍蝇穿越的地形的影响。最不常被捕获的蝇是在6-12天大时释放到宿主作物中的蝇。结果显示了以下行为模式。
苍蝇在成年后的头2天几乎不动，但到第3天，两性都分散到c。离释放点100米。已知苍蝇在第四天左右交配，此后雄性继续在c处分散。每天100米，连续三天。“野生”的女性从外地收集puperies进行了“迁移”飞行，但是，并分散在C。1000米，每天在第五和第六天，产卵开始前的日子。记录了在寄主作物和非寄主作物地区释放的苍蝇的类似传播率。
有些雌性并没有在遇到第一批作物时就停下来。来自实验室饲养的蛹的培养雌性仅分散在c。是野生雌性的三分之一当地居民有相当多的混杂。在产卵前期释放的幼蝇和野蝇，雄蝇的再捕率分别为38 ± 4和19 ±4，雌蝇的再捕率分别为15 ± 2和8 ± 1。
甘蓝根蝇的扩散范围可能在侵染地点的2000-3000 m半径内。
Summary
The dispersal rates of wild and culture cabbage root flies Erioischia brassicae were determined in release-recapture experiments at Wellesbourne in 1971–3. The experiments were concerned mainly with the first 7 days of adult life. The flies, released from nine locations in the area, were recaptured in yellow water-traps.
Dispersal was affected by wind, rain and the terrain the flies were crossing. The flies least often recaptured were those released into the host crop when 6–12 days old. The results indicated the following pattern of behaviour.
Flies moved little during the first 2 days of adult life but by the third day both sexes had dispersed to c. 100 m from the release point. Flies are known to mate about the fourth day and after this the males continued to disperse at c. 100 m per day for the three subsequent days. ‘Wild’ females from field-collected pupae carried out a ‘migratory’ flight, however, and dispersed at c. 1000 m per day during the fifth and sixth days, the days preceding the start of oviposition. Similar rates of dispersal were recorded from flies released across host crop and non-host crop areas.
Some females did not stop at the first crop they encountered. The culture females from the laboratory-reared pupae dispersed only c. one-third of the distance of the wild females. There was considerable intermingling of local populations. The percentage recapture of young culture and wild flies released during the pre-oviposition period of this species was 38 ± 4 and 19 ±4 for males, and 15 + 2 and 8+1 for females, respectively.
The dispersal range of the cabbage root fly is probably within a 2000–3000 m radius of the site of infestation.