不完全二代区玉米螟种群动态的生态过程与发生量预测

Ecological process and forecasting of population dynamics of the Asian Corn Borer(Ostrinica furnacalis)in one and half generation regions in northeast China

玉米螟（Ｏｓｔｒｉｎｉａｆｕｒｎａｃａｌｉｓ）是我国东北玉米生产的主要害虫，近年来危害加重。本文概述了在不完全二代区，玉米螟发生量预测的必要性及国内外研究现状，对不完全二代区的亚洲玉米螟（ＡＣＢ）种群动态的生态过程做了详细的论述。以ＡＣＢ种群的系统分析为基础，从越冬幼虫的滞育率、冬季死亡率、冬后化蛹、羽化率、至成虫死亡率、成虫迁入产卵对寄主的选择性及成虫的产卵量，最后到田间卵、蛀前幼虫、蛀后幼虫的死亡率及其影响因子天气、天敌、寄主等均做了论述。本文最后讨论了越冬源基数，成虫数量及田间卵量和造成危害的４～５龄幼虫间的相互关系及其在预测中的作用。

The Asian corn borer (ACB) is the most important insect pest in northeastChina where is one of main corn production region in China. The damage caused by ACB ismore and more serious in recent 7 years. Based on the characteristics of the j.ocal applied c(7rl'trol methods,it is necessary to know the IV-V instars population density of ACB larvae iongbefore it occurs. The status of estimating and predicting population density of ACB and theEuropean corn borer (ECB) are reviewed. Based on a system analysis of the ACB population.the ecological process of ACB popuulation dynamics in one and half gencration region is discribed in detail. The following ecological proceses are discussed:dial3ause rate, mortality dur ing winter, pupation and emergence rate for population in overwintering site, the mortality,the host plant preference for mating,oviposition and staying, and fecundity of adult populanon,the mortality of egg,larvae of I-III instars and IV--V instars for the population in cornfields during growing season. The enfluencial factors including temperature, precipitation,light period,parasitoids .predators,Beauveria spp., bectera and host plant conditions are discussed. Finnally,the relationship between density of IV-V instar and initial larvae populationdensity in spring,adult number caught light or pheromone trap and egg mess density in fieldis discussed.