研究方向：

1.入侵生物学与生物安全

2昆虫的生物防治及绿色防控体系的构建

科研项目：

1气候变暖对白洋淀地区烟粉虱及其寄生蜂种群动态的影响以及二者的响应机制(QN2015194)，河北省教育厅项目

2烟粉虱调控其两种优势寄生蜂种间和种内竞争作用的机理(C2016201016)，河北省自然科学基金

3烟粉虱对其两种优势寄生蜂种间竞争的调节和响应机制(31601694)，国家自然科学基金

4寄主资源可利用性对烟粉虱寄生蜂种间竞争的影响（2017M610168），中国博士后科学基金

1. Hai-Yun Xu, Nian-Wan Yang, Guo-Dong Ren, Fang-Hao Wan, 2018. Comparison of demographic fitness and biocontrol effectiveness of two parasitoids, Encarsia sophia and Eretmocerus hayati (Hymenoptera: Aphelinidae), against Bemisia tabaci (Hemiptera: Aleyrodidae). Pest Management Science, doi: 10.1002/ps.4908.

2. Hai-Yun Xu, Nian-Wan Yang, Min Duan, Fang-Hao Wan, 2016. Functional response, host stage preference and interference of two whitefly parasitoids. Insect Science, 23:134-144.

3. Hai-Yun Xu, Nian-Wan Yang, Fang-Hao Wan, 2015 Field cage evaluation of interspecific interaction of two aphelinid parasitoids and biocontrol effect on Bemisia tabaci (Hemiptera: Aleyrodidae) Middle East-Asia Minor 1. Entomological Science, 18:237-244.

4. Hai-Yun Xu, Nian-Wan Yang, Fang-Hao Wan, 2013. Competitive interactions between parasitoids provide new insight into host suppression. PLoS ONE 8(11): e82003. doi:10.1371/journal.pone.0082003.

5. 徐海云, 杨念婉, 万方浩, 2015. 浅黄恩蚜小蜂与海氏桨角蚜小蜂卵巢发育模式研究.科技导报, 33(7):79-83

6. 徐海云, 杨念婉, 万方浩, 2014.寄生蜂的内竞争和外竞争作用.中国生物防治学报, 30(4): 546-551.

7. 徐海云, 杨念婉, 万方浩, 2011.昆虫群落中天敌间的致死干扰竞争作用. 昆虫学报, 54(3): 361-367.