摘要
番茄潜叶蛾Tuta absoluta (Meyrick)源产于南美洲的秘鲁,是世界番茄的毁灭性害虫,2017年8月首次在我国新疆发现,对我国番茄及其他茄科粮蔬作物生产安全构成了潜在巨大威胁。龄期划分是深入研究番茄潜叶蛾生物学习性,明确其种群发生规律,提高预测预报和防治(如基于幼虫寄生蜂利用的生物防治)效果的基础。头壳宽度是幼虫分龄的重要指标。本研究通过逐日测量幼虫的头壳宽度和虫体长度,并运用频次分布、Dyar法则、Crosby指数、Brook指数和回归分析对测量的数据进行统计分析,研究番茄潜叶蛾的幼虫龄期划分。研究结果表明,番茄潜叶蛾幼虫头壳宽度符合Dyar法则和Crosby生长法则,并呈现出明显的指数回归关系,可作为幼虫龄期划分的重要形态指标。番茄潜叶蛾幼虫划分为4个龄期,各龄期幼虫头壳宽度分别为0.1375~0.1575 mm、0.2125~0.2725 mm、0.3200~0.4100 mm和0.4975~0.5800 mm。与之对应龄期的幼虫体长分别为0.80~1.52 mm、0.91~3.33 mm、2.42~4.89 mm和4.18~7.32 mm,可作为判定龄期数的辅助指标。于室内27℃温度下饲养幼虫,平均历期约13 d,其中1~4 d为第1龄、3~6 d为第2龄、4~7d为第3龄、6~15d为第4龄。头壳宽度可作为幼虫龄期划分的重要指标,番茄潜叶蛾幼虫分为4个龄期;同一龄期内幼虫体长变异性较大,各龄期重叠程度较高,可作为幼虫龄期划分的辅助指标。
The tomato leafminer Tuta absoluta(Meyrick),originated in Peru,South America,is a worldwide destructive pest of tomato.In China,T.absoluta was first detected in Xinjiang in 2017 and has posed a potential threat to China’s tomato and other grain and vegetable solanaceous crops.Division of larval instars of the leafminer is important for studies of biological characteristics,population dynamics,and population monitoring and prediction and control,such as biocontrol based on larval parasitoids.The head capsule width is an important index for larval instar division.The number of larval instars was determined and tested according to the frequency distribution analysis,Dyar’s rule,Crosby’s growth rule,as well as regressive analysis based on two measured parameters,the head capsule width and body length.The head capsule width of the leafminer larvae fitted well with the Dyar’s rule and Crosby’s growth rule.There was an obvious exponential regression relationship between the number of larval instars and the head capsule width,showing that the head capsule width can be used as an important index for larval instar division.The larvae of T.absoluta can be divided into four instars.The values of the head capsule width of the 1st,2nd,3rd,and 4th instar larvae were 0.1375―0.1575 mm,0.2125―0.2725 mm,0.3200―0.4100 mm,and 0.4975―0.5800 mm,respectively.The values of body length corresponding to the above four larval instars were 0.80―1.52 mm,0.91―3.33 mm,2.42―4.89 mm,and 4.18―7.32 mm,respectively,which could be used as an auxiliary index to determine the number of larval instars of the tomato leafminer.At 27ºC,the larvae completed development in 13 d,the 1st,2nd,3rd,and 4th larval instars lasted 1―4 d,3―6 d,4―7 d,and 6―15 d,respectively.Thus,the T.absoluta larvae are divided into four instars according to the head capsule width,while the body length can be used as an auxiliary index in larval instar division duo to its great variation in the same and between instars.
作者
张桂芬
殷惠军
王玉生
李振江
毕思言
王瑞
刘万学
万方浩
ZHANG Guifen;YIN Huijun;WANG Yusheng;LI Zhenjiang;BI Siyan;WANG Rui;LIU Wanxue;WAN Fanghao(State Key Laboratory for Biology of Plant Diseases and Insect Pests/Key Laboratory of Invasive Alien Species Management,Ministry of Agriculture and Rural Affairs/Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China;Center for Management of Invasive Alien Species,Ministry of Agriculture and Rural Affairs of the People’s Republic of China,Beijing 100193,China;College of Plant Protection,Hunan Agricultural University,Changsha 410125,China)
出处
《中国生物防治学报》
CSCD
北大核心
2023年第2期340-345,共6页
Chinese Journal of Biological Control
基金
国家重点研发计划(2021YFD1400200,2017YFC1200600)
中国农业科学院科技创新工程(caascx-2017-2022-IAS)
长沙市自然科学基金(kq2014067)。
关键词
番茄潜叶蛾
幼虫龄期
头壳宽度
回归分析
体长
Tuta absoluta
larval instar
head capsule width
regressive analysis
body length
