论文部分内容阅读
北京地区中华草蛉成虫在越冬期间大量死亡,春季发生量很低。研究结果指出秋季将田间采集或室内饲养的成虫充分喂以啤酒酵母饲料及清水,贮存在不加温的房中,至来年4月初,全黄型成虫的死亡率不超过7.5％。死亡率与贮存场所的温度、贮存时间、贮存开始时成虫的体色、贮存密度、及贮存前成虫的营养条件有密切的关系。在羽化后贮存前和气温回升后提供充足的饲料,更为重要。在不加温房中贮存51—80天,或15℃中贮存10天后移入27℃长光照定温室的成虫,分别在4—5天和10.5天后开始产卵。室内保护成虫越冬和人为地提早打破休眠的办法,为获得大量廉价天敌,接种释放后增加春季草蛉基数,及时控制害虫创造了条件。
In China, adults of Chinese weedy kelp died in large numbers during the winter and occurred very little in spring. The results of the study indicate that in the fall, adults in the field or indoors should be adequately fed with brewer’s yeast feed and fresh water and stored in unheated rooms. By early April of the next year, all-yellow adult mortality does not exceed 7.5%. Mortality is closely related to the temperature at the storage site, storage time, body color, storage density and the nutritional status of adults before storage. It is even more important to provide sufficient feed before eclosion after storage and after temperature rises. After being stored in an unheated room for 51-80 days, or after being stored at 15 ° C for 10 days, adults that were moved into a long light-fixed greenhouse at 27 ° C were spawned at 4-5 days and 10.5 days, respectively. Indoor protection of adults overwintering and man-made ways to early break dormancy, in order to obtain a large number of cheap natural enemies, after inoculation release to increase the spring kohlrabi base, the timely control of pests to create the conditions.