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新宾县位于辽宁东部山区,地势高、地形复杂、气温低、无霜期短,玉米螟的生活规律尚未做过系统调查.我校从1974年秋季开始,对玉米螟坚持了四年的调查研究,初步摸清了生活规律.调查按越冬虫态基数、化蛹、羽化、产卵、孵化、龄期变化及食性、各期为害、发生世代等,现将情况报告于后.一、越冬虫态基数1.秋割前剖秆调查.选择各有代表性的玉米地5块.①村屯附近播种早、长势好的一
Xinbian County is located in the eastern mountainous area of Liaoning Province, with high topography, complicated topography, low temperature and short frost-free period, and has not been systematically investigated for the life of the corn borer.Under the autumn of 1974, our school insisted on the investigation of the corn borer for four years, Preliminary find out the law of life.Was surveyed according to overwintering insect base, pupation, emergence, spawning, hatching, age changes and diet, each period of damage, the occurrence of generation, etc., now report the situation later. Base 1. Autumn cut pre-cut investigation. Select the representative of the cornfield 5. ① sowing near the village early, good growth one