石榴园桔小实蝇种群动态研究

通过20032、004年的系统调查,对云南省建水县不同管理水平下的石榴园桔小实蝇种群动态规律进行研究。结果表明:建水石榴园,7月始见桔小实蝇成虫,危害高峰出现在9、10月,不同石榴园中桔小实蝇种群消长规律年与年之间有所差异,特别是种群数量方面。不同石榴园之间桔小实蝇的发生时间和数量不同,这也许是管理水平不同导致石榴园抗虫性不同所致。

基于逐步回归分析的桔小实蝇种群数量变动及其影响因子的研究

[目的]研究影响桔小实蝇种群变动的显著影响因子。[方法]利用逐步回归分析方法对云南建水县桔小实蝇种群数量变动的规律及影响其发生的气象因子进行分析,并建立回归模型,最后通过云南建水县2004～2006年数据对回归模型进行回检。[结果]影响桔小实蝇发生量的主要气象因子为相对湿度、月最低气温和降雨量。[结论]该研究为桔小实蝇发生时期、发生量以及发生高峰期的预测提供了参考。

Population Quantity Variations of Oriental Fruit Fly (Bactrocera dorsalis Hendel) on the Basis of Stepwise Regression Analysis

[Objective] The research aimed to study the significant influence factors of the population variations of oriental fruit fly. [Method] Using stepwise regression analysis, the population variations law of oriental fruit fly in Jianshui County of Yunnan province and the meteorological factors that caused its occurrence were analyzed. And the regression model was built. Finally, the regression model was tested on the basis of the data in Jianshui County of Yunnan Province during 2004-2006.[Result] The main meteorological factors that influenced the occurrence of oriental fruit fly were relative humidity, the lowest monthly temperature and rainfall. [Conclusion] This study will provide certain reference for the prediction researches on the time, quantity and occurrence peak of oriental fruit fly.

石榴叶斑病的发病规律及防治方法

石榴叶斑病又称黑斑病、褐斑病、角斑病,是最常见的一种石榴病害。该病发病率高,严重发生时可导致叶片早期全部脱落,严重削弱树势,对石榴生长发育及次年开花均有影响。