知识与财富的链接
根据2003—2004年多个地点的桔小实蝇Bactrocera dorsalis(Hendel)监测数据和室内恒温条件下发育历期观察结果,采用地理信息系统技术和发育历期模型的方法,研究了广东省杨桃园桔小实蝇成虫2个发生高峰期地理分布规律和发生期预测技术.结果表明,广东省桔小实蝇成虫年度第1个发生高峰期呈现由南向北、由西向东逐渐推迟的趋势,而最后一个发生高峰期基本表现为由北向南、由东向西逐渐推迟的规律.第1个高峰最早是3月20—24日出现在湛江地区,最迟是4月28日—5月1日出现在梅州、潮州、揭阳部分、汕头部分、韶关西北部的几个县区和清远东部的山区.最后一个高峰期出现时间和地区规律基本上与第1个高峰期相反.建立了当代桔小实蝇成虫发生高峰期预测下一代成虫发生高峰期的模型.对这2种预测方法的检验结果表明,两者均能较为准确地预测出相应的桔小实蝇成虫发生高峰期.
Based on the data of Bactrocera dorsalis (Hendel) adults quantity collected from the starfruit orchards in different locations of Guangdong Province in 2003-2004,and development durations of different stages at different constant temperatures in laboratory,the distribution dynamics of two peaks of adult including the first and the last peaks in a year.The methods of GIS and development-duration-model were used in the study.The results revealed that the first peaks of the pest adults appeared earlier when it progressed from southern part to northern part,and from western part to eastern part of Guangdong Province,and the last peaks of the adults appeared oppositely to the first peaks.The model for forecasting the peaks based on the development durations was constructed.The two methods of GIS and the development duration model could forecast the fruit fly peaks correctly at starfruit orhcards in Guangdong Province.
