红蜘蛛与炭疽病原来仅是我国北部果区的重点突出病虫害,而在黄河故道新建果区较少危害。但近年来已逐渐南下,据1982年砀山农干校汇报,红蜘蛛危害造成早期落叶占全园的70%,因炭疽病危害果实占40%,不仅当年收益减少,而且影响来年果品产量和质量。 Red spider mites and anthrax were originally the fruit pests and diseases in the northern part of the northern part of China, but they were less harmful to the new part of the old course of the Yellow River. However, in recent years, it has gradually moved southward. According to the report of the 1982 Agricultural School of Qianshan, the damage caused by spider mites accounts for 70% of the early deciduous trees and 40% of the fruits harmed by anthracnose. This not only reduces the returns but also affects the output and quality of fruit products in the coming year.