基于遥感信息的干旱区林果病虫害时空变化特征

通过分析干旱区林果业的生长与发展主要分布特征,对南疆特色林果病虫害的分布与程度进行了研究。根据实际的工作流程,结合遥感图像处理技术,提出了遥感监测林果病虫害的方法,利用植被指数形式模型和TM数据不同波段组合模式,建立病虫害遥感监测模型,提取叶城县林果病虫害信息,结合林果种植信息数据库和实测数据,分析结果表明:干旱区林果病虫害发生和分布的特征主要是耕地周边地区,荒漠地带发生病虫害的范围大,水渠及湿地附近的病虫害发生几率高,通过实地考察和历史数据验证,利用遥感提取林果病虫害的方法是可行的,能够及时了解干旱区林果病虫害发生情况,对病虫害的治理及其林果业的长期发展提供依据。

Change characteristics of pest distribution on peculiar fruit trees in arid area based on remote sensing information

Most of the peculiar fruit trees in south Xinjiang are growing in the surrounding area around Tarim Ba-sin.A methodology to monitor early spots of forest insect pests and disease with TM data is discussed in this paper,and it has been proved very efficient.Satellite remote sensing has provided a good instance for macroscopic monito-ring.Due to the strong sun light and great evaporation,the quality of the fruits in south Xinjiang is excellent.On the other side,drought and few rains are easy to cause insect pest hazard.This paper analyzed the distribution and the extent of the pests on peculiar fruit tIlees with the method of remote sensing analysis combined with the field measurement.The results showed that Mthough there are many kinds of pests,but most of them are convergence.Because of the particularity of geographical conditions,climatic and vegetation circumstance,the transmittance of the pests are limited.It is not easy to break out in large area.According to the established fruit tree databank,it is pos-sible to comprehend the precaution of insect pests and is helpful to control them.It can also be used to make the long term plan of the peculiar fruit tree development.