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害虫生活于外界环境之中,它们和周围环境(气象、土壤、生物等)互相联系、互相影响着。这些生态(环境)条件时时刻刻作用于害虫,影响着害虫生长发育的快慢、发生数量的多少、发生范围的大小。因此,研究害虫和生态条件间的关系,是进行害虫预测预报的理论基础。 本文以分析三化螟的发生期与气象条件间的关系为例介绍几种相关统计方法,其主要特点是简单、直观,并有一定的实效。凡具备四则运算能力的人都能掌握。因此对于县、社、队植保工作人员尤为实用。
Pests live in the external environment, and they and the surrounding environment (meteorology, soil, biology, etc.) interrelated and influence each other. These ecological (environmental) conditions always act on pests, affecting the growth and development of pests speed, the number of occurrence, the size of the range. Therefore, the study of the relationship between pests and ecological conditions is the theoretical basis for pest prediction. In this paper, we analyze the relationship between the occurrence period of rice stem borer and meteorological conditions as an example to introduce some relevant statistical methods. The main features are simple, intuitive and have some practical results. Anyone who has four computing power can grasp. Therefore, the county, community, team plant protection staff is particularly useful.