落花后的防治4月中下旬,即梨落花90%左右时,正是中国梨木虱孵化盛末期,此时多为幼龄若虫(未产生大量分泌物)易被药剂杀死;梨蚜也开始转移危害;梨黑星病开始侵染幼芽嫩梢,产生乌码子。此时喷施1.8%阿维菌素5000倍液混以12.5%特谱唑可湿性粉剂2000倍液即可杀死多种害虫和预防各种病菌的侵染。 After falling control in late April, that is, about 90% of the pear falling, it is the end of the peak of Chinese pear psylla hatching, this time mostly young nymphs (did not produce large amounts of secretions) easily killed by pesticides; pear aphid also started Transfer hazards; pear scab disease began to infiltrate young shoots, resulting in codon usage. At this point spraying 1.8% abamectin 5000 times mixed with 12.5% ​​Toxazole WP 2000 times to kill a variety of pests and prevent the infection of various germs.