相对湿度对红彩瑞猎蝽生长发育和捕食斜纹夜蛾的影响  

The Effect of Relative Humidity on the Development of Rhynocoris fuscipes and the Predation on Spodoptera litura

作　　者：孙郑 游梓翊 陈德鑫 林一凡 胡燕 邓海滨 SUN Zheng;YOU Ziyi;CHEN Dexin;LIN Yifan;HU Yan;DENG Haibin(Tobacco Research Institute of Guangdong Province,Shaoguan Guangdong 512029,China;Haikou Cigar Research Institute,Hainan Provincial Branch of CNTC,Haikou 571100,China;Tobacco Company of Shaoguan City in Guangdong Province,Shaoguan Guangdong 512029,China)

机构地区：[1]广东省烟草科学研究所,广东韶关512029 [2]中国烟草总公司海南省公司海口雪茄研究所,海口571100 [3]广东烟草韶关市有限公司,广东韶关512029

出　　处：《植物医学》2024年第6期64-74,共11页Plant Health and Medicine

基　　金：中国烟草总公司科技重大专项项目〔110202101028(LS-03),110202101046(LS-06)〕;中国烟草总公司广东省公司科技项目(201944000020031);海南省重点研发计划项目(ZDYF2021XDNY141).

摘　　要：红彩瑞猎蝽是烟田斜纹夜蛾的重要捕食性天敌昆虫,为探究不同湿度对红彩瑞猎蝽生长发育及捕食能力的影响,室内测定了温度为28℃、相对湿度条件分别为15%,35%,55%,75%和95%时,红彩瑞猎蝽卵发育历期、孵化率、各龄若虫发育历期、体质量及存活率、成虫寿命、对斜纹夜蛾3龄幼虫的日均捕食量等指标.结果表明:55%~75%是红彩瑞猎蝽生长发育的最适湿度,在此条件下,红彩瑞猎蝽卵发育历期最短、孵化率最高、若虫生长发育历期最短、若虫和成虫的存活率最高.在15%和95%相对湿度的条件下,红彩瑞猎蝽的卵孵化率下降显著,若虫发育历期显著延长,若虫体质量降低,若虫存活率下降,成虫寿命缩短.不同湿度下红彩瑞猎蝽若虫及成虫对斜纹夜蛾3龄幼虫的捕食量无明显差异.研究结果表明,相对湿度条件为55%~75%是红彩瑞猎蝽生长发育的最适湿度,能够提高天敌繁育质量,为今后进一步明确扩繁该天敌昆虫的最适环境条件和实践应用奠定了良好的理论基础.The predatory insect Rhynocoris fuscipes plays a crucial role in controlling Spodoptera litura populations in tobacco fields.To investigate the impact of different humidity levels on the growth,development,and predation ability of R.fuscipes,indoor experiments were conducted at a temperature of 28℃ with relative humidity of 15%,35%,55%,75%,and 95%,respectively.Various parameters including egg development period,hatching rate,nymph development period,body weight,survival rate of R.fuscipes individuals(both nymphs and adults),adult lifespan duration were measured alongside with daily average predation rates on third instar S.litura larvae.The findings suggest that an optimal humidity range between 55% to 75% is most effective to promote the growth and development of R.fuscipes,in which condition,egg hatching rates reached the highest level,ensuring high survival rates for both nymphs and adults.However,exposure to 15% and 95% relative humidity led to significant reduction of hatching rate of R.fuscipes,prolonged nymph development periods,decreased nymph body weight and survival rates,as well as shortened adult lifespans.There was no notable difference in the predation capacity of R.fuscipes nymphs and adults on third instar S.litura larvae under varying humidity levels.The results demonstrated that the optimal humidity range for the growth and development of R.fuscipes lies between 55% and 75% relative humidity.This range can enhance the breeding quality of natural enemies,providing a solid theoretical foundation for further determining the optimal environmental conditions and practical applications for the propagation of this beneficial insect.

关 键 词：红彩瑞猎蝽 相对湿度 生长发育 斜纹夜蛾 捕食量 

分 类 号：S433.3[农业科学—农业昆虫与害虫防治]