蝗虫微孢子虫对东亚飞蝗产卵及后代发育的影响

摘要：以东亚飞蝗作为本次试验的试虫，研究不同浓度（1。25X106个/ml、5X106个/ml、2X107个/ml）的蝗虫微孢子虫液处理后，对其在产卵量、蝗卵的孵化率、后代发育历期和后代雌雄性比等方面的影响。实验结果表明，蝗虫微孢子虫的侵染会使东亚飞蝗的产卵能力受损。各实验组的产卵量都低于对照组，其中1。25X106个/ml 和2X107个/ml 浓度蝗虫微孢子虫处理的实验组较5X106个/ml蝗虫微孢子虫处理的实验组低；各实验组获得的蝗虫卵块重量上均低于对照组，蝗虫卵粒长宽均都小于对照组；2X107个/ml 浓度蝗虫微孢子虫处理的实验组蝗卵的孵化率高于1。25X106个/ml 和5X106个/ml蝗虫微孢子虫处理的实验组；1。25X106个/ml蝗虫微孢子虫处理的实验组东亚飞蝗子代中雌雄性比发生显著地变化，雌性个体比例显著提高；不同浓度的蝗虫微孢子虫的侵染对东亚飞蝗子代个体各龄具有不同程度的影响，但在幼虫发育历期，并无明显的变化。73042

毕业论文关键词：东亚飞蝗；蝗虫微孢子虫；产卵能力；发育历期；雌雄性比

Abstract: Fecundity, hatchability of egg, development of offspring and sex ratio of Locusta migratoria manilensis(Meyen) were studied at three different varieties of concentration treatment of Nosema locustae。 The result showed that Nosema locustae infestation would damage fecundity。 Locust egg mass obtained in each experimental group were lighter than the control group, the length and the width of locust eggs obtained in each experimental group were shorter than the control group; The hatching rate of egg obtained in experiment group treated with 2X107/mL was higher than others; The sex ratio of offspring would significant changes in experiment group treated with 1。25X106/ml, the sex ratio was obviously higher than others; The infection of different concentration of Nosema locustae with different impact on each developmental process of offspring, but it was no significant change in the total development duration of offspring。

Key word: Locusta migratoria manilensis; Nosema locustae; fecundity; offspring; development duration; sex ratio

引言 4

1 材料与方法 5

1．1实验材料 5

1。2不同浓度蝗虫微孢子虫对东亚飞蝗产卵量的影响 5

1。3不同浓度蝗虫微孢子虫对东亚飞蝗卵孵化率的影响 5

1。4不同浓度的蝗虫微孢子虫对东亚飞蝗后代发育历期的影响 5

1。5不同浓度蝗虫微孢子虫对东亚飞蝗后代雌雄性比的影响 6

2 结果分析 6

2。1不同浓度蝗虫微孢子虫对东亚飞蝗产卵量的影响 6

2。2不同浓度的蝗虫微孢子虫对东亚飞蝗孵化率的影响 7

2。3不同浓度的蝗虫微孢子虫对东亚飞蝗后代发育历期的影响 7

2。4不同浓度的蝗虫微孢子虫对东亚飞蝗后代雌雄性比的影响 8

3 讨论 9

参考文献 10

引言

东亚飞蝗Locusta migratoria manilensis (Meyen)属直翅目Orthoptera，蝗总科Acridoidea，斑翅蝗科Oedipodidae，飞蝗属Locusta Linnaeus昆虫[1]。东亚飞蝗具有繁殖速度快、繁殖能力高、食性广、食量大和迁飞扩散能力强等生理学和生态学特性，成为农业重大害虫之一。我国是农业大国，蝗虫灾害的发生对我国的农业经济造成了巨大的损失。在防治东亚飞蝗时，化学农药的使用不仅使昆虫产生了抗药性，而且对环境造成了严重的污染，甚至引发了一系列社会、经济与环境问题。[2]这一切为探讨和开发与环境相容性好的生物杀虫剂提供了依据。蝗虫微孢子虫对东亚飞蝗产卵及后代发育的影响:http://www.youerw.com/shengwu/lunwen_83185.html