<正>利用单向电泳和双向电泳技术，以及考马斯亮蓝染色法研究了银杏雌、雄株叶片中的营养贮藏蛋白质组分和不同季节叶片的可溶性蛋白质含量。结果表明：银杏叶片中可溶性蛋白质含量在生长旺季较高，10月下旬开始下降，至11月中旬降至最低，表明叶片脱落时养分发生了转移。电泳图谱的分析发现，随叶片可溶性蛋白质含量的变化，银杏叶片中的几种蛋白质发生变化。单向电泳结果表明，55kD蛋白在银杏雌株中表现为11月初消失，在雄株中表现为11月中旬消失，32kD蛋白在雌雄株中都表现为11月后消失；而双向电泳的研究除证实55kD蛋白、32kD蛋白发生类似变化，还发现18kD蛋白也发生变化，即11月中旬在雌株中发生明显减少现象，在雄株中明显减少则出现在11月初。

Biological characteristics, life cycle and epidemic law of Micromelalopha troglodyte in Shanghai were studied for the first time. There are 5 generations per year, specially up to 6 generations. After the first generation, there is a severe generation overlap phenomenon. Epidemic is closely related to climate and environment:there is some prominent positive correlation among its population and original pest density, daily average temperature, rainfall; daily mean humidity. This insect occurred when the daily average temperature was over 15℃, and prevailed when the daily average temperature was 25~30℃, daily mean humidity was 65%~ 85%, daily mean rainfall was 50~150 mm. On this base, a short-term forecast model was built:Y=-- 101. 909--0. 091xl +0. 155x2 -t-0. 338x3 +0. 659x4 +-0. 539x5, R=0. 739. After being tested, the model has a high accuracy and can be used to forecast in Shanghai.