The feeding selectivity to tea cultivars, leaf age and amount of consumption in laboratory conditions and yield loss under different insect density and tea cultivars in plant were investigated to understand the feeding habit ofM. aurolineatus and to provide information on economic threshold ofM. aurolineatus control. The results showed thatM. aurolineatus has declining selectivity to tea cultivars Dangui, Fuyun 6 and Huangdan. AdultM. aurolineatus consumed most food on Dangui, followed by Fuyun 6 and Huangdan but the difference is not significant. In 1~4 pairs of feeding density, the average feeding time was 11.8 days on Fuyun 6 and at one pair of feeding density, the average life span was 13.75±1.0 days. Furthermore,M. aurolineatustends to take food from young leaves. The yield loss coefficient by each pair of insectwas 1.65 g. The regression equation between insect density(x, heads per square metre of tea garden) and yield loss(y, g per 0.11m2) was y = 0.0184x + 0.5611. To achieve the target production of 100~125 kg·666.7m-2 in Fuyun 6, the current controlling threshold(more than 15 head ofMyus-a in per square metre of tea garden) is reasonable. Compared with Fuyun 6, the food consumption ofMyus-a on Dangui increased by 29.24% in laboratory conditions and significant yield loss was found when the population density ofM. aurolineatus exceeded 10 head per square meter of land in field test. The regression equation between yield loss and insect density in fields was y = 0.0665x + 0.7969, suggesting that the controlling threshold would be more then 10 heads per square meter of land for cultivar Dangui.%为了解茶丽纹象甲成虫的取食习性及为害性,以便为制订防治指标提供参考,本文开展了茶丽纹象甲成虫对茶树品种与叶位的选择性、食量等室内试验和不同虫口密度、不同品种下的茶园小区为害损失研究.结果表明,茶丽纹象甲成虫对不同品种茶梢具有明显的选择性,表现为丹桂>福云6号>黄棪.成虫期取食量(叶面积,mm2)为丹桂>黄棪>福云6号,但无显著差异.当喂饲福云6号品种茶梢时,在1~4对饲养密度下,每对成虫取食时长平均为11.8 d,在1对饲养密度下,每对成虫平均寿命为13.75±1.0 d;与老叶相比,茶丽纹象甲成虫倾向于取食新叶;茶丽纹象甲对福云6号品种的危害系数(每对成虫)为1.65 g,茶园虫口密度(x,头·m-2)与减产量(y,g·0.11m-2)的回归方程为:y = 0.0184x + 0.5611,对于亩产量100~125 kg的福云6号茶园,使用目前的防治指标(成龄投产茶园每平方米虫量在15头以上)是合适的.室内茶丽纹象甲在丹桂品种上的取食量比福云6号品种提高29.24%,在茶园虫口密度为10 头·m-2时引起茶青产量显著损失,虫口密度与减产量的回归方程为:y = 0.0665x + 0.7969,防治指标建议定为成龄投产茶园每平方米虫量10头以上.
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