西兰花贮期黑斑病病原菌鉴定及防治技术研究

西兰花贮期主要病害是黑斑病,经病原菌鉴定,属芸苔生链格孢菌。4℃的低温只能抑制而不能终止该菌的生长,而35℃可有效抑制该菌的生长。pH在5~9的范围内菌落生长良好,pH低于3和高于11时该菌几乎完全受到抑制。臭氧和减压均能抑制该病原菌的生长,浓度为300 mg/m3的臭氧杀菌效果显著,浓度再增高,杀菌效果与300 mg/m3差异不显著,在101~20 kPa的压力范围内,压力越低,抑菌效果越好,以压力40 kPa较为理想。

Studies on the Identification and Prevention of the Pathogen in Storage of Broccoli Black Spot Disease

Main disease is black spot disease in storage of broccoli.It was Alternaria brassicicola by identifying of pathogen.The pathogen could be restrained but not be terminated at 4 ℃.However,high temperature(35 ℃) seems to effectively restrain its growth.The pathogen could grow in the condition of pH 5-9,while it grew slowly under the condition of strong acid and strong alkali.Ozone and decompression could inhibit growth of pathogen.The effect of sterilization by 300 mg/m3 ozone on the pathogen is obvious.However,the bactericidal effect is the same as that of 300 mg/m3 ozone when the concentration of ozone is higher than 300 mg/m3.In addition,the lower the pressure is,the more prominent the effect is.The inhibiting effect is optimal when the pressure drops to 40 kPa.