桨角蚜小蜂在自然变温条件下的发育情况  

Development of Eretmocerus sp. under Natural Temperature Conditions

作　　者：方美娟[1] 何晓庆[1] 刘冬[1] 王玉波[1] 

机构地区：[1]河北省农林科学院旱作农业研究所,河北衡水053000

出　　处：《河北农业科学》2015年第4期59-62,共4页Journal of Hebei Agricultural Sciences

基　　金：农业部行业科研专项(201103002)

摘　　要：为了了解在室外自然温度条件下桨角蚜小蜂的最佳释放时机和释放量,为其田间应用提供理论依据。本研究以寄生在棉花上的B型烟粉虱为寄主,在6月初~10月中旬室外自然温度条件下,调查了不同时期桨角蚜小蜂的发育历期、寄生率和羽化率。结果表明：7月中下旬温度最高,此时日平均最高温度33.69℃、最低温度23.88℃,桨角蚜小蜂发育历期最短仅为13.72 d,寄生率为34.86%但与最高值差异不显著,羽化率最高达到了95.74%;10月中上旬温度最低,此时日平均最高温度22.67℃、最低温度11.67℃,桨角蚜小蜂发育历期最长达到了24.90 d,寄生率和羽化率最低分别为19.70%和79.99%。6月初~10月中旬,随着温度的升高,桨角蚜小蜂的发育历期变短,寄生率和羽化率升高;反之,该蜂的发育历期变长,寄生率和羽化率降低。To clarify the effect of natural conditions on the biology ofEretmocerus sp. , development situation were studied under natural conditions outside. Development duration, parasitic rates and emergence rates of Eretmocerus sp. on Bemisia tabaci reared on cotton were studied under natural conditions from early June to mid-October. The results showed that in the period range from early June to mid-October, the temperature in late July was higher than other periods, in this time daily average maximum temperature was 33.69 ℃, and the minimum temperature was 23.88 ℃ in the night, in this period the development duration of Eretmocerus sp. was the shortest which was 13.72 days, parasitic rates and emergence rates were higher than other periods which were 34. 86% and 95.74%, respectively. However, the temperature was the lowest in early October, the daily average maximum temperature was 22. 67 ℃, and the minimum temperature was 11.67 ℃, the development duration was longest which was 24. 90 days, parasitic rates and emergence rates were 19.70% and 79.99%. From early June to mid-October, with the increased of temperature, the developmental duration of Eretmocerus sp. decreased significantly, parasitic rates and emergence rates increased, in contrast, with the decreased of temperature, the developmental duration, parasitic rates and emergence rates were the opposite.

关 键 词：桨角蚜小蜂 自然温度 发育历期 寄生率 羽化率 

分 类 号：S476-3[农业科学—农业昆虫与害虫防治]