叉角厉蝽对烟青虫的控害能力及烟田定殖潜力研究  

Control Capacity of Eocanthecona furcellata to Helicoverpa assulta and Its Colonization Preference

作　　者：方亮 苑金戈 付国润 陈岗 吴子云 柴云霞 李学林 任伟 李亚迎 刘怀[2] FANG Liang;YUAN Jinge;FU Guorun;CHEN Gang;WU Ziyun;CHAI Yunxia;LI Xuelin;REN Wei;LI Yaying;LIU Huai(Yunnan Tobacco Company of Chuxiong,Chuxiong Yunnan 675000,China;Chongqing Key Laboratory of Entomology and Pest Control Engineering/College of Plant Protection,Southwest University,Chongqing 400715,China;Yunnan Luye Biocontrol Technology Co.LTD.,Yuxi Yunnan 653100,China)

机构地区：[1]云南省烟草公司楚雄州公司,云南楚雄675000 [2]西南大学植物保护学院/昆虫学及害虫控制工程重庆市市级重点实验室,重庆400715 [3]云南绿叶生防科技有限公司,云南玉溪653100

出　　处：《植物医学》2022年第6期89-96,共8页Plant Health and Medicine

基　　金：重庆市技术创新与应用发展专项(cstc2020jscx-lyggX0006,cstc2021jscx-lyjsAX0005);中国烟草总公司云南省公司绿色防控重大专项(2020530000241016)。

摘　　要：为明确捕食性天敌叉角厉蝽在烟田生态系统的定殖能力及其对烟青虫的控制效果,在室内和田间分别测定了叉角厉蝽对不同龄期烟青虫的捕食功能反应和防效,并选取10种烟田及周边生境的常见宿主植物测定其选择行为.结果表明:在温度25℃、相对湿度65%、光暗比16∶8的条件下,叉角厉蝽成虫对烟青虫3至5龄幼虫的捕食均符合HollingⅡ圆盘方程,其对3龄烟青虫幼虫的理论日捕食量最高,为56.5头,瞬时攻击率为0.87,平均处置时间为0.02 d,理论捕食容量为49.25头.叉角厉蝽以20头/667 m^(2)的初始密度释放一次,7 d后对烟青虫的平均防效达55.91%, 14 d对烟青虫的平均防治效果为68.29%,较25 g/L溴氰菊酯乳油防效提高了6.09%.叉角厉蝽对蜜源性植物有选择偏好性,在10种供选植物上的分布比例从高到低依次是大豆、棉花、萝卜、木槿、菽麻、红薯、玉米、青花菜、芋头、烟草,其中在菽麻和木槿上产卵最多,其次是玉米,而烟草、青花菜、红薯、芋头上未见卵块.叉角厉蝽对烟青虫具有较大的控害潜能,在烟田周围生境内种植蜜源植物可一定程度上提高其定殖能力,本研究为烟青虫的生物防治提供一定的参考依据.In order to evaluate the control efficiency of the predatory bug Eocanthecona furcellata(Wolff) on the oriental tobacco budworm Helicoverpa assulta(Guenée) and its colonization ability in the field, the predation functional response of E. furcellata was conducted on different instars of H. assulta both under laboratory and field condition. Ten common plant species in tobacco planting system were selected to determine the preference of E. furcellata. The results showed that the predatory functional response regression of E. furcellata on the 3rdto 5thinstar larvae of H. assulta matched with the Holling II disc equation under the condition of(25±1) ℃,(65±5)% R.H. and 16 L∶8 D photoperiod. The theoretical daily predation capacity of adult L. dichotoma to 3rdinstar larvae of H. assulta was the highest at 56.5 individuals, the instantaneous attack rate was 0.87, the handling time was 0.02 d, and the theoretical maximum predation capacity was 49.25 individuals. With one release at initial density of three hundred E. furcellata per hm^(2), the average control efficiency of H. assulta was 55.91% on the 7thday, and the average control effect of H. assulta was 68.29 % on the 14thday, which was 6.09% higher than that of 25 g/L deltamethrin emulsifiable concentrate treatment. E. furcellata adults had a preference for nectar plants in the tobacco ecosystem. The distribution ratio of E. furcellata adults on the 10 plant species from high to low is soybean, cotton, radish, hibiscus, janapan, sweet potato, maize, broccoli, taro, tobacco. The highest oviposition of E. furcellata were observed on janapan and hibiscus plants, followed by maize. E. furcellata did not lay eggs on tobacco, broccoli, sweet potatoes and taro. In conclusion, E. furcellata had great potential for biological control of H. assulta. Planting certain types of nectar plants around tobacco fields could improve the colonization of this predatory bug.

关 键 词：叉角厉蝽 烟青虫 功能反应 定殖能力 生物防治 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]