| 三种赤眼蜂对灰白蚕蛾的卵龄选择 |
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| 引用本文： | 何余容,谢梅琼,欧海英,田明义.三种赤眼蜂对灰白蚕蛾的卵龄选择[J].植物保护学报,2011,38(1):20-24. |
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| 作者姓名： | 何余容 谢梅琼 欧海英 田明义 |
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| 作者单位： | 华南农业大学资源环境学院昆虫学系,广州,510642 |
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| 基金项目： | 国家自然科学基金(30871677), 广州市科技攻关项目(2003Z2E0141) 作者简介: 何余容, 女, 1963年生,教授,研究方向为昆虫生态学, email: yrhe@scau.edu.cn |
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| 摘 要： | 灰白蚕蛾Ocinara varia.是近年来华南地区为害较严重的园林害虫,为筛选有效防治灰白蚕蛾的赤眼蜂种,在室内条件下比较了短管赤眼蜂Trichogramma pretiosum、松毛虫赤眼蜂T.dendroli-mi和暗黑赤眼蜂T.euproctidis对不同卵龄灰白蚕蛾卵的寄生能力和适应能力.结果显示,随寄主卵龄的增加松毛虫赤眼蜂和暗黑赤眼蜂寄生卵数均呈下降趋势,且都在灰白蚕蛾卵龄为6h的卵上寄生卵数最多,分别为15.90粒/雌和12.20粒/雌;而短管赤眼蜂的寄生卵数随寄主卵龄的增加呈先上升后下降趋势,在卵龄为24 h时达最高,为8.25粒/雌;在各卵龄段,松毛虫赤眼蜂的寄生卵数均比其它2种蜂多;当寄主卵龄超过72 h时,3种赤眼蜂的寄生卵数均显著下降.3种赤眼蜂在寄生卵龄为6h的寄生卵上羽化率最高,当卵龄超过72 h时,其羽化率均显著下降.松毛虫赤眼蜂和暗黑赤眼蜂对6h卵龄的灰白蚕蛾卵致死能力最强,而短管赤眼蜂对24 h卵龄的灰白蚕蛾卵致死能力最强.综合分析表明,松毛虫赤眼蜂在灰白蚕蛾卵上的寄生能力和适应能力最好,是灰白蚕蛾的有效天敌.
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| 关 键 词： | 赤眼蜂 灰白蚕蛾 卵龄选择 |
| 收稿时间： | 4/9/2010 12:00:00 AM |
Host age selection for eggs of Ocinara varians by three Trichogramma species |
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| He Yurong,Xie Meiqiong,Ou Haiying and Tian Mingyi.Host age selection for eggs of Ocinara varians by three Trichogramma species[J].Acta Phytophylacica Sinica,2011,38(1):20-24. |
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| Authors: | He Yurong Xie Meiqiong Ou Haiying and Tian Mingyi |
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| Institution: | Department of Entomology, College of Environment and Natural Resources, South China Agricultural University, Guangzhou 510642, Guangdong Province, China;Department of Entomology, College of Environment and Natural Resources, South China Agricultural University, Guangzhou 510642, Guangdong Province, China;Department of Entomology, College of Environment and Natural Resources, South China Agricultural University, Guangzhou 510642, Guangdong Province, China;Department of Entomology, College of Environment and Natural Resources, South China Agricultural University, Guangzhou 510642, Guangdong Province, China |
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| Abstract: | Ocinara varians Walker is one of the most serious insect pests of ornamental plants in southern China in recent years. In order to screen effective Trichogramma species against O.varians, the parasitic capacity and suitability of three egg parasitoids, Trichogramma pretiosum Riley, T.dendrolimi Matsumura and T.euproctidis (Girault), to different ages of O.varians eggs were compared in the laboratory. The results revealed that the number of eggs parasitized by T.dendrolimi and T.euproctidis decreased as the host egg age increased, and the two species reached their maximum parasitizing capability on 6 h-host egg with 15.9 and 12.2 eggs per female, respectively. However, the number of eggs parasitized by T.pretiosum increased firstly and then decreased, and its maximum parasitizing capability was observed on 24 h-host egg with 8.3 eggs per female. The parasitizing capability of T.dendrolimi was higher on all host egg ages than the other two species of Trichogramma. When the host egg age was over 72 h, the parasitizing capabilities of three species declined dramatically. The emergence rates of three Trichogramma species reached the highest on 6 h-parasitized eggs, and dramatically decreased when the age of parasitized eggs were over 72 h. T.dendrolimi and T.euproctidis had the strongest fatalities to 6 h-host eggs, while T.preti- osum had the strongest fatalities to 24 h-host eggs. In conclusion, T.dendrolimi showed the best parasiti- zing capability and suitability on O.varians eggs, indicating that it had the potential ability as an effective biological control agent for controlling O.varians. |
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| Keywords: | Trichogramma Ocinara varians host eggs age-selection |
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