秋白梨褐痘病发病原因及其防治研究

秋白梨褐痘病是一种重要的贮藏期病害。经1994—1996年系统地研究，明确了该病系由高氨、低钙和钙、氮比失调所致的生理病害；采收后果实淋雨，预贮期和贮藏前期温度过高，入库晚、预贮期长，预贮及贮藏前期果实衰老快，均有利于发病。采取增施农家肥，追施氮、磷、钾、钙、硼复合肥，生长期对面和果实喷施钙、硼液，采后短期预贮“发汗”，及时低温贮藏等综合措施，可有效地防止该病的发生。

LARGE-SCALE MASS TRAPPING FIELD TRIALS FOR THE CONTROL OF ORIENTAL FRUIT MOTH WITH SYNTHETIC SEX PHEROMONE

Sex pheromone mass trapping trials for the control of the oriental fruit moth, Grapholitha molesta Busck, were conducted in pear orchards of Suizhong County in Liaoning Province from 1980—1982. Mass-trapped areas were about 780,4,000 and 5,400 hectares in 1980, 1981 and 1982,