摘要
为明确大豆食心虫Leguminivora glycinivorella(Mats)成虫在田间自然条件下雌雄比例及其动态,在大豆食心虫成虫发生期,采用田间随机网捕法系统调查其成虫性比。在室内测定雌雄比例变化对其繁殖及寿命的影响,系统观察记录成虫寿命及雌虫的产卵量,并对成虫性比与其寿命和生殖力的相关性进行了分析。结果表明:大豆食心虫田间自然种群雌雄性比随成虫发生时期延续而逐渐增大,其动态规律符合指数函数模型y=0.032 1 exp(0.207 6 x),且雄虫羽化早于雌虫。室内试验结果显示:大豆食心虫性比的变化显著影响成虫寿命、产卵期、产卵前期及产卵量。大豆食心虫成虫性比为1∶1时成虫寿命最长,雌虫、雄虫寿命分别为15.6和15.7 d。成虫寿命随着性比的增加或减少呈显著缩短的趋势,表现出明显的性比失衡寿命消耗现象。性比为1∶1时产卵持续期最长为8.1 d,随着某性别所占比例的增加,其产卵期逐渐缩短。性比小于1时雌虫的产卵前期和产卵量均显著长于和高于性比大于等于1时,且当性比为1∶4时产卵量最高,为82.4粒。大豆食心虫雌雄比与雌虫产卵量之间关系符合指数函数模型y=101.740 7 exp(-0.174 2 x)(R2=0.934 8;F=71.694 7;P=0.000 4)。上述研究结果能够为进一步开展该害虫预测预报和评价性诱剂防治效果等绿色综合防控技术研究提供科学依据。
In order to find out the sex ratio and dynamics of Leguminivora glycinivorella(mats) under natural conditions in the field, the sex ratio variation was surveyed by net sample method during L. glycinivorella adults emerged season in the soybean field. And the fecundity and lifetime of adult influenced by sex ratio variation were tested in the lab. The results of field survey showed that the sex ratio of natural population were increasing with the adult emerge season development and its variation tendency coincident with the exponential function model: y=0.032 1 exp(0.207 6 x). Laboratory test result showed that: The sex ratio of L. glycinivorella significantly affected the lifetime, preoviposition period, oviposition period, and fecundity. The longest lifetime was 15.6 d for female and 15.7 d for male when sex ratio was 1∶1. The life span of adults decreased significantly with the increase or decrease of sex ratio. The life expectancy phenomenon was caused by sex imbalance. The longest oviposition period of female was 8.1 d at 1∶1 sex ratio, the oviposition period decreased with the sex ration going down or up. When sex ratio was below 1, the pre-oviposition period was significantly longer than that when the sex ratio was above 1. The highest fecundity was 82.4 when the sex ratio was 1∶4, and when the sex ratio was below 1, all the fecundity were significantly bigger than that when the sex ration was above 1. The relationship between sex ratio of L.glycinivorella and spawning amount of female insect was in accordance with exponential function model y =101.740 7 exp(-0.174 2 x)(R2=0.934 8, F=71.694 7, P=0.000 4). The above research results provide scientific theory for further monitor and control of L. glycinivorella by sex pheromone.
作者
李文敬
李新畅
李旋
崔娟
徐伟
张金平
史树森
LI Wen-jing;LI Xin-chang;LI Xuan;CUI Juan;XU Wei;ZHANG Jin-ping;SHI Shu-sen(College of Plant Protection,Jilin Agricultural University,Jilin 130118,China;MARA-CABI Joint Laboratory for Bio-safety,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China)
出处
《大豆科学》
CAS
CSCD
北大核心
2020年第3期451-457,共7页
Soybean Science
基金
吉林省科技发展计划(20180201015NY)
现代农业产业技术体系建设专项(CARS-04)。
关键词
大豆食心虫
性比
产卵前期
产卵期
产卵量
成虫寿命
Leguminivora glycinivorella
Sex ratio
Pre-spawning
Spawning stage
Fecundity
Lifetime of adult
