放蜂方式对松毛虫赤眼蜂田间防效的影响  

Effects of Wasps-Releasing Methods on Field Control Efficacy of Trichogramma dendrolimi

作　　者：张晨 马巾超 刘旭东 齐振阳 王宇 ZHANG Chen;MA Jinchao;LIU Xudong;QI Zhenyang;WANG Yu(Agricultural College,Jilin Agricultural Science and Technology University,Jilin 132101,China)

机构地区：[1]吉林农业科学院农学院,吉林吉林132101

出　　处：《黑龙江农业科学》2024年第10期27-33,共7页Heilongjiang Agricultural Sciences

基　　金：吉林省科技发展计划项目(YDZJ202301ZYTS366)。

摘　　要：为提高赤眼蜂田间防治效果,降低释放成本,通过测定松毛虫赤眼蜂(Trichogramma dendrolimi)在两种放蜂方式[蛹后期释放、混合生育期释放(即预蛹期、蛹中期和蛹后期)],6个时间段(释放后1~6 d),5个距离点(0,5,10,15,20和25 m)下的实际防效,明确放蜂方式对松毛虫赤眼蜂田间寄生能力的影响。结果表明,单独释放松毛虫赤眼蜂(Td)蛹后期时,Td仅可在放蜂后3 d内对田间不同距离的玉米螟卵块进行寄生,各距离点寄生率均随放蜂时间增加而降低。在相同放蜂时间,随着距离的增加,寄生率均呈下降趋势。而混合释放预蛹期、蛹中期和蛹后期释放Td,可以在6 d内对田间玉米螟卵块进行寄生。比较两种放蜂方式发现,在释放Td 3 d后,混合释放的Td表现出更好的扩散能力。由此得出,松毛虫赤眼蜂适合采用混合释放方式。In order to improve the field control effect of Trichogramma and reduce the release cost,clarify the effect of wasps-releasing methods on the control efficacy of the T.dendrolimi in the field,this study measured the actual control effectiveness of T.dendrolimi(Td)under two different release methods(post pupal release,mid pupal release,and post pupal release),six time periods(1-6 days after release),and five distance points(0,5,10,15,20 and 25 m).When the Td was completely released in the post-pupal stage,the Td only parasitizes the egg masses of ACB at different distances in all directions in the field within three days after the release.The parasitism rate at each distance point decreases with the increase of the release time.At the same release time,the parasitic rate showed a decreasing trend with the increase of distance.When Td was released in mixed developmental stages including the pre-pupal,mid-pupal and post-pupal stages,the wasps could parasitize the egg masses in the field within 6 days after the release.By comparing the effects of two different wasps release methods on the control efficacy,it was found that within two days of releasing Td,there was no significant difference in the field dispersal ability.On the 3 rd,4 th,5 th and 6 th days after releasing Td,the mixed release of the wasps spread better.These results indicated that the mixed release method is suitable for T.dendrolimi.

关 键 词：放蜂方式 松毛虫赤眼蜂 玉米螟 田间防效 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]