中亚迁飞场域下旋歧夜蛾的迁飞行为研究
The migratory behaviour of Scotogramma trifolii in the Central Asian insect migration zone
杨 静，汪姝玥，查绪栋，刘程才，ROMAN Jashenko，季 荣
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DOI：10.7679/j.issn.2095-1353.2023.083
作者单位：新疆师范大学生命科学学院，新疆特殊环境物种保护与调控生物学实验室，中亚区域跨境有害生物联合控制国际研究中心
中文关键词：旋歧夜蛾；卵巢发育；雷达观测；气象条件；昆虫迁飞场
英文关键词：Scotogramma trifolii; ovarian development; radar observations; meteorological conditions; insect migration zone
中文摘要：
【目的】 明确中亚迁飞场域下旋歧夜蛾Scotogramma trifolii迁飞行为与其在东亚昆虫迁飞场的差异。 【方法】2019-2021年连续3年利用昆虫雷达、辅助高空灯和地面灯等设备对新疆塔城地区旋歧夜蛾迁飞行为和种群数量进行观测，并以旋歧夜蛾大发生年份开展其飞行高度、速度、方向及迁飞高峰期气象特征研究。 【结果】旋歧夜蛾迁飞高峰期，卵巢发育等级主要为3-4级，雌雄性比大于1；飞行高度介于200-1 000 m之间，主要在200-500 m的高度飞行，飞行速度以7-9 m/s为主；旋歧夜蛾群体飞行方向以东南偏东方向为主。迁飞高峰期高空盛行西北气流，迁飞高峰日925和900 hPa高空温度介于15-28 ℃，湿度介于40%-55%。 【结论】气流运动方向、高空温湿度不同是导致中亚迁飞场域下旋歧夜蛾迁飞行为与东亚迁飞场域下存在差异的主要原因。
英文摘要：
[Objectives] To investigate differences between the migration behavior of Scotogramma trifolii in the Central Asian insect migration zone and other migration zones. [Methods] The migratory behavior of S. trifolii in the Tacheng area of Xinjiang was observed for three consecutive years from 2019 to 2021 using insect radar, auxiliary aerial lights and ground lights. During the peak migration period, flight altitude, speed, direction and meteorological characteristics were measured in years in which S. trifolii was abundant. [Results] During the peak migration period, ovarian development was mainly at level 3 or 4, and the male to female ratio was >1. Flight height ranged from 200-1 000 m, but was mainly at 200-500 m, and the flight speed was mainly 7-9 m/s. S. trifoli populations fly mainly in an east-southeast direction. During the peak migration period, northwest airflow was prevalent at high altitudes, with temperatures ranging from 15-28 °C and humidity from 40%-55% at 925 hPa and 900 hPa on peak migration days. [Conclusion] Airflow, high altitude temperature and humidity are the main reasons for the different flight behavior of S. trifoli in the Central Asian insect migration zone compared to that in other insect migration zones in East Asia.