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近几年来,随着保护地番茄面积的不断扩大,原作为次要病害的灰霉病己逐渐上升为主要病害,并对生产构成严重威胁,如果防治不及时,会造成较大损失。据对永年、磁县、邯郸县等地的调查,一般发病时损失15％—20％,流行时可达30％以上,因此,在生产上一定要重视对此病的防治,采取农业生态措施与化学药剂防治相结合的方法,是目前最有效的方法。 一、发生规律与发病因素。本病为真菌性病害,病原为灰葡萄孢菌。病菌在土壤或病残体上越冬,通过伤口或组织器官表皮侵入,随气流及农事操作传
In recent years, with the continuous expansion of the tomato area in the protected area, the gray mold originally used as a secondary disease has gradually risen as the major disease and poses a serious threat to the production. If the prevention and treatment is not implemented in time, it will cause a great loss. According to the survey of Yongnian, Cixian and Handan Counties, the incidence of common diseases is 15% -20%, and the prevalence is up to 30%. Therefore, we must pay attention to the prevention and control of this disease in production and take the agro-ecological measures The combination of chemical control methods, is the most effective method. First, the occurrence of laws and factors. The disease is a fungal disease, the pathogen is Botrytis cinerea. Bacteria overwinter in the soil or disease residues, invasion through the wound or tissue organ epidermis, with the airflow and agricultural operation