摘要
草地贪夜蛾已成为严重威胁我国粮食生产的重大入侵害虫,生产上需要精准的测报技术。卵巢发育分级是鳞翅目害虫短期测报的主要手段,但目前尚缺乏对草地贪夜蛾卵巢发育分级技术的研究。本文对草地贪夜蛾卵巢发育分级与繁殖潜力预测方法的研究表明,草地贪夜蛾卵巢管发育始于蛹期,成虫卵巢发育可分成5个级别:乳白透明期(Ⅰ级)、卵黄沉积期(Ⅱ级)、成熟待产期(Ⅲ级)、产卵盛期(Ⅳ级)及产卵末期(Ⅴ级)。在25℃下,草地贪夜蛾卵巢发育Ⅰ~Ⅴ级成虫平均日龄分别为1.22、2.24、4.26、6.68及9.08 d,卵巢管平均长度分别为42.12、45.55、61.75、48.88和19.45 mm,卵巢管平均宽度分别为272.21、329.40、490.16、567.55和462.42μm,卵粒平均直径分别为126.57、339.40、490.16、477.55和489.97μm,卵巢管抱卵量分别为1 251.68、1 747.04、1 809.92、732.64和81.12粒。卵巢发育分级与卵巢管长度及卵巢管宽度符合三次多项式方程关系,与卵粒直径及抱卵量符合二次方程关系。以上结果提出了草地贪夜蛾卵巢发育分级与繁殖潜力的预测方法,为草地贪夜蛾种群发生期和发生量的预测预报工作提供了技术支撑。
The fall armyworm, Spodoptera frugiperda(J. E. Smith) is threatening crop production in China as an important invasive pest, and monitoring and forecasting method of S.frugiperda is needed for its effective control. Ovary development gradation is an important technique in pest monitoring and forecasting. In this paper, we studied the methods for ovarian development gradation and reproduction potential prediction of S.frugiperda. Our results showed that the pupae of the insect has an immature ovary, and the adult ovaries can be graded into five stages, including transparent opalescent phase(Ⅰ), yolk deposition phase(Ⅱ), egg maturation phase(Ⅲ), peak phase of oviposition(Ⅳ) and terminal phase of oviposition(Ⅴ). The mean day-age forⅠ-Ⅴ females were 1.22,2.24,4.26,6.68 and 9.08 days at 25℃. The mean length of the ovarian tubes were 42.12, 45.55, 61.75, 48.88 and 19.45 mm, the mean width of the ovarian tube were 272.21, 329.40, 490.16, 567.55 and 462.42 μm, the mean diameters of egg were 126.57, 339.40, 490.16, 477.55 and 489.97 μm, the mean number of eggs within ovarian tubes were 1 251.68, 1 747.04, 1 809.92, 732.64 and 81.12, respectively. Regression analysis revealed that ovarian development grade fit with a cubic polynomial equation with the length and width of ovarian tubes, and fit with a quadratic equation with egg diameters and the number of eggs within ovarian tubes. The methods for ovarian development gradation and reproduction potential prediction of S.frugiperda are valuable for the accurate forecast of outbreak time and occurrence quantity of the pest in the field.
作者
赵胜园
杨现明
和伟
张浩文
姜玉英
吴孔明
ZHAO Shengyuan;YANG Xianming;HE Wei;ZHANG Haowen;JIANG Yuying;WU Kongming(State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China;College of Plant Protection Henan Agricultural University,Zhengzhou 450002,China;China National Agro-Tech Extension and Service Center,Beijing 100125,China)
出处
《植物保护》
CAS
CSCD
北大核心
2019年第6期28-34,共7页
Plant Protection
基金
国家现代农业产业技术体系建设专项(CARS-15-19)
中央级公益性科研院所基本科研业务费专项(Y2019YJ06)
关键词
草地贪夜蛾
卵巢发育级别
繁殖潜力
测报
Spodoptera frugiperda
ovary development stage
reproduction potential
monitoring and forecasting
