芹菜容易发生“烂心”现象,其主要症状是芹菜外叶深绿,心叶干黄、腐烂。此现象在芹菜整个生育期都可发生,尤其是苗期发生更为严重,轻者导致芹菜缺苗减产,重者甚至因此毁种。一、发病原因1、缺钙引起的生理病害。由于高温、干旱、施肥不当或棚室温度过高,水份缺乏,阻碍根系对钙 Celery prone to “bad heart ” phenomenon, the main symptoms are dark green celery leaves, heart leaves dry yellow, decay. This phenomenon can occur throughout the growth of celery, especially in the seedling stage is more serious, the light caused celery seedlings cut, or even destroyed. First, the incidence of 1, calcium deficiency caused by physiological diseases. Due to high temperature, drought, improper fertilization or greenhouse temperature is too high, lack of water, impede the root of calcium