樟颈曼盲蝽的生活史、生物学习性及若虫的形态

Studies on Life Cycle,Biological Habits of Mansoniella cinnamomi(Zheng et Liu) and Morphological Characteristics of Their Nymphs

研究了上海市水源涵养林内樟颈曼盲蝽(Mansoniella cinnamomi(Zheng et Liu,1992))的生活史和生物学习性,以及若虫的龄期划分和各龄若虫的形态特征。依据樟颈曼盲蝽若虫头宽值频次和形态特征,其若虫共分5龄,1～5龄若虫的头宽值分别为(0.23±0.03)、(0.34±0.02)、(0.47±0.03)、(0.57±0.02)、(0.68±0.03)mm,并详细描述了各龄若虫的形态特征。该虫在上海地区一年发生4代,以卵在叶柄、叶主脉及嫩梢皮层内越冬,具有明显的世代重叠现象。确定了樟颈曼盲蝽各世代的发生历期,编制了其在上海地区的生活史表,详细观察记录了成虫的羽化、交尾、产卵等习性和若虫的活动、取食及脱皮等习性。

The life cycle and biological habits of Mansoniella cinnamomi （Zheng et Liu） were investigated in the water conserva- tion forest of Shanghai, and the differentiation of instars and morphological characteristics of their nymphs were also done. On the basis of head width frequency distribution and morphological characteristics, the nymph of M. cinnamomi could be divided into five instars with the head width of 0.23＋0.03, 0. 34＋-0. 02, 0. 47＋-0. 03 , 0.57＋-0.02 and 0.68＋-0.03 ram, respectively. The nymph morphological characteristics in each age were described in detail. The pests occur four genera- tions per year with obvious overlapped generations in Shanghai, and their eggs overwinter under the cortex in petiole, chief vein and the thin end of twig. The generation occurrence calendars of M. cinnarnomi were determined and the life cycle ta- ble was provided for Shanghai. Detailed habits of adult during the periods of emergence, mating and oviposition were ob- served, and the activity, feeding and mohing habits of nymphs were also recorded.