杀菌剂与吡虫啉混合配剂对褐飞虱种群增长的影响  

Effects of Fungicide/Insecticide Mixtures on Population Growth of Brown Planthopper, Nilaparvata lugens St?l(Hemiptera: Delphacidae)

作　　者：何林懋 申屠旭萍 李丹婷 孙帆 俞晓平 HE Linmao;SHENTU Xuping;LI Danting;SUN Fan;YU Xiaoping(Zhejiang Provincial Key Laboratory of Biometrology and Inspection ＆ Quarantine/College of Life Science, China Jiliang University, Hangzhou 310018, China)

机构地区：[1]中国计量大学生命科学学院/浙江省生物计量及检验检疫技术重点实验室,杭州310018

出　　处：《中国生物防治学报》2018年第2期280-286,共7页Chinese Journal of Biological Control

基　　金：国家重点研发计划(2016YFF0202300); 国家自然科学基金(31401793,3164001); 浙江省公益技术研究项目(2017C32006,2018C02030); 浙江省自然科学基金(LY12C14012); 浙江省大学生科研创新活动计划(2016R40956)

摘　　要：褐飞虱Nilaparvata lugens St?l是亚洲国家水稻产区的主要害虫,其腹部脂肪体内存在大量类酵母共生菌(Yeast-like symbiotes,YLS)。YLS对褐飞虱的生长发育和繁殖起着至关重要的作用。以YLS为靶标,通过抑制褐飞虱体内YLS从而控制褐飞虱的发生必将是今后有效防治褐飞虱的新途径。前期研究表明,与单一的化学杀虫剂相比,杀虫剂和杀菌剂的混配制剂因能有效抑制褐飞虱体内YLS的数量从而导致褐飞虱更高的死亡率。本研究利用生命表和Morris-Watt数学模型分析了27%丰加霉素&四霉素P&四烯菌素B&四霉素A和75%肟菌酯&戊唑醇分别与吡虫啉的混合配剂对褐飞虱种群增长影响。结果表明,2种混合配剂处理后褐飞虱体内YLS的数量均明显下降,且褐飞虱种群增长指数显著低于吡虫啉处理组,混合配剂对褐飞虱的抑制作用主要表现在卵孵化期和成虫产卵期。本研究结果为褐飞虱防治提供了新的思路和方法。The brown planthopper（BPH）, Nilaparvata lugens St？l（Hemiptera： Delphacidae）, is a serious insect pest of rice in many Asian countries. There are many yeast-like symbiotes（YLS） in the fat-body cells of BPH abdomen. YLS has important physiological and trophic functions on the growth, development and fecundity of BPH. Because of the symbiotic relationship between BPH and YLS, it will be a new way to manipulate BPH occurrence through inhibiting YLS. Our previous study demonstrated that fungicide/insecticide mixtures could cause a marked reduction in YLS number in BPH, resulting in a significantly higher mortality of BPH than using the insecticide-imidacloprid alone. In order to identify the key developmental stages of BPH at which the fungicide/insecticide mixtures have the most effectiveness, the life table and Morris-Watt mathematical model were used as a comprehensive evaluation method in analysis of the effects of two fungicide/insecticide mixtures on the BPH population growth. The mixture of 27% toyocamycin tetramycin P tetrin B tetramycin A with imidacloprid and the mixture of 75% trifloxystrobin tebuconazole WG with imidacloprid significantly inhibited the BPH population growth. The index of population trend of BPH obtained from the treatments with the two mixture pesticides was obviously lower than that of the positive control（imidacloprid only）. It can be deduced that the fungicide inhibits the growth of YLS and less YLS transmits from the fat-body to the oocyte. Using the fungicide/insecticide mixtures at the egg-hatching stage and the ovipositional stage of BPH could be an effective strategy for BPH management.

关 键 词：褐飞虱 类酵母共生菌 混合配剂 种群增长 生命表 

分 类 号：S476.1[农业科学—农业昆虫与害虫防治]