| 潘雪红，魏吉利，商显坤，黄诚华,,甘蔗黄螟幼虫龄数的划分及其发育历期观察[J].环境昆虫学报,(): |
| 甘蔗黄螟幼虫龄数的划分及其发育历期观察 |
| Larval instars determination for Tetramoera schistaceana (Lepidoptera: Olethreutidae) and observation of its developmental duration |
| |
| DOI： |
| 中文关键词: 甘蔗黄螟 幼虫龄期 头壳宽度 Crosby 指数 回归分析 |
| 英文关键词:Tetramoera schistaceana Snellen larval instars head capsule width Crosby's ratio regression analysis |
| 基金项目: |
|
| 摘要点击次数: 3 |
| 全文下载次数: 0 |
| 中文摘要: |
| 为明确甘蔗黄螟Tetramoera schistaceana Snellen幼虫的龄数和发育历期，以便进一步研究其生物学生态学特性，为该虫的预测预报和精准防控提供科学依据。本实验以天然饲料茭白Zizania caduciflora为寄主饲养的甘蔗黄螟为研究对象，对不同龄期幼虫的头壳宽度和发育历期进行了测量，并对所测得的数据进行了Crosby指数、Brook指数、频次分布和回归分析。结果表明：甘蔗黄螟幼虫经过5个龄数进入化蛹，各龄头壳宽值分别为：0.293、0.437、0.615、0.911和1.222 mm。头壳宽符合Dyar法则和Crosby法则。头壳宽与龄数间的直线、二次和指数拟合模型均较好。指数拟合模型的决定系数（R2）最大，拟合度最好。在26℃温度下，1~5龄幼虫平均龄期分别为2.766、2.913、3.107、3.413和8.860 d。甘蔗黄螟幼虫有5个龄期，头壳宽是甘蔗黄螟幼虫虫龄判定的重要指标。在26℃条件下，从卵孵化，雌、雄幼虫平均分别需要20.265 d和19.250 d后进入化蛹。 |
| 英文摘要: |
| Larval instars of Tetramoera schistaceana Snellen and its developmental duration were researched to provide scientific basis for studying its biological and ecological characteristics, forecasting and controlling this pest. T. schistaceana fed with Zizania latifolia (Griseb.) in the laboratory were the research object in this paper. Head capsule widths and developmental periods of larvae at each larval instars were measured. And head capsule widths were analyzed through Crosby ratio, Brook ratio, frequency distribution and regression analysis. The results showed that T. schistaceana passed through five larval instars to attain its pupal stage. The mean head capsule widths of 1st~5th instar larvae were 0.293, 0.437, 0.615, 0.911 and 1.222 mm, respectively. The head capsule widths conformed to Dyar's law and Crosby's law. The fitting degrees of linear，quadratic and exponential fitting models between head capsule width and instar were fine. The coefficient of correlationin exponential fitting model was the largest，and the fitting degree was the best. So head capsule widths can be used as an important indicator for larval instars determination. The developmental duration of 1st~5th instar larvae were 2.766, 2.913, 3.107, 3.413, and 8.860 d respectively at 26℃. T. schistaceana larvae are divided into five instars. The head capsule width is an important index for distinguishing the larval instars of T. schistaceana. From egg hatching to pupation, female and male larvae require 20.265 d and 19.250 d on average at 26℃, respectively. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
