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异色瓢虫是蚜虫、松干蚧、木虱和粉蚧的重要捕食性天敌。该虫在浙东地区一年发生四至五代,以成虫越冬,属兼性滞育,全世代发育积温313.6日度。各代成虫产卵前期6.6至13.2天,产卵量426.6至769.4粒,影响产卵的因子主要有食料、温度、湿度、风等。瓢虫种群随着饲养密度的增加,成育率逐渐下降。在松林内瓢虫种群数量出现三个高峰,分别在4月下旬、6月上旬和10月上旬,这主要与该虫的食性和对气候的适应性及敌害密切相关。
Harmonia axyridis is an important predatory natural enemies of aphids, pine scales, psyllids and mealybugs. The insects occurred in eastern Zhejiang four to five generations a year, with adult overwintering, is a part-time diapause, accumulated throughout the development of accumulated temperature 313.6 days. Each generation of pre-oviposition of 6.6 to 13.2 days, the amount of eggs from 426.6 to 769.4, the main factors affecting the spawning food, temperature, humidity, wind and so on. Ladybug population with increasing stocking density, fertility rate gradually decreased. The number of ladybugs in the pine forest appears three peaks, respectively, in late April, early June and early October, which is mainly related to the pest diet and climate adaptability and predacity.