Tian Jun-Ce, Wang Zi-Chen, Wang Guo-Rong, Zhong Lie-Quan, Zheng Xu-Song, Xu Hong-Xing, Zang Lian-Sheng, Lu Zhong-Xian
State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, 198 Shiqiao Road, Hangzhou 310021, China (
Xiaoshan Centre of Agricultural Technology Extension, Xiaoshan 211203, China (
J Econ Entomol. 2017 Jun 1;110(3):949-953. doi: 10.1093/jee/tox108.
The Cnaphalocrocis medinalis (Guenée) is one of the most important rice pests in Asia and is difficult to control by chemical insecticides due to its rapid development of resistance. To screen potential species for biological control of C. medinalis, we investigated the effects of temperature (20, 24, 28, 32, and 36 °C) and host age (1-, 2-, 3-, and 4-d-old) on the fecundity of four Trichogramma spp. on C. medinalis eggs. Our results indicated that C. medinalis eggs were acceptable to T. japonicum, T. chilonis, T. dendrolimi, and T. ostriniae, though no eggs were parasitized at 36 °C. There were no significant differences in parasitism among the four Trichogramma species under the tested temperature regions, except at 20 °C where parasitism by T. japonicum was significantly higher than that by T. chilonis and T. ostriniae. However, T. japonicum had significantly more progeny than the other three Trichogramma species at 32 °C. All four Trichogramma species performed well on 1-, 2-, and 3-d-old C. medinalis eggs, but parasitism on 4-d-old eggs was significantly reduced. Trichogramma japonicum parasitized the highest number of C. medinalis eggs on different aged hosts and had more progeny than the other Trichogramma species, especially on 3-d-old hosts. In conclusion, T. japonicum exhibited better performance on C. medinalis eggs than the other three Trichogramma species and could be considered as our most suitable Trichogramma candidate for control of C. medinalis.
稻纵卷叶螟（Guenée）是亚洲最重要的水稻害虫之一，由于其对化学杀虫剂的抗性迅速发展，难以通过化学杀虫剂进行防治。为了筛选用于生物防治稻纵卷叶螟的潜在物种，我们研究了温度（20、24、28、32和36 °C）和寄主年龄（1、2、3和4日龄）对四种赤眼蜂在稻纵卷叶螟卵上繁殖力的影响。我们的结果表明，日本赤眼蜂、螟黄赤眼蜂、松毛虫赤眼蜂和玉米螟赤眼蜂都能接受稻纵卷叶螟卵，尽管在36 °C时没有卵被寄生。在测试的温度范围内，除了在20 °C时日本赤眼蜂的寄生率显著高于螟黄赤眼蜂和玉米螟赤眼蜂外，四种赤眼蜂之间的寄生率没有显著差异。然而，在32 °C时，日本赤眼蜂的后代明显多于其他三种赤眼蜂。所有四种赤眼蜂在1、2和3日龄的稻纵卷叶螟卵上表现良好，但在4日龄卵上的寄生率显著降低。日本赤眼蜂在不同年龄寄主上寄生的稻纵卷叶螟卵数量最多，后代也比其他赤眼蜂多，尤其是在3日龄寄主上。总之'，日本赤眼蜂在稻纵卷叶螟卵上的表现优于其他三种赤眼蜂，可被视为控制稻纵卷叶螟最合适的赤眼蜂候选物种。
