“早丰”番茄系西安市农科所育成,1982年引进我市。几年鉴定及生产示范的结果表明,该组合具有明显的杂交优势,抗逆性强,抗病毒病。早熟性好,果大、圆整、产量高,经济价值大,因此栽培面积逐年扩大。但“早丰”番茄在露地栽培时,特别在六月下旬到七月上旬霉雨季节期间早疫病危害严重,是造成“早丰”番茄露地栽培总产不高的原因。早疫病又称轮纹病,病菌可以在土中或病株残体上越冬。种子表面也可以带菌,病菌通过风、雨、昆虫传播,从寄主的气孔、表皮或伤口侵入危害。在气温26～28℃、湿度 “Zao Feng” tomato is bred by Xi’an Institute of Agriculture and introduced to our city in 1982. Several years of identification and production demonstration results show that the combination has obvious advantages of hybrids, strong resistance, anti-virus disease. Premature, good fruit, round, high yield, economic value, so the cultivation area is expanding year by year. However, when the “ZF” tomato was planted in the open field, especially the early blight during the moldy rainy season from late June to early July, it caused the low yield of the “ZF” tomato. Early blight, also known as rotavirus, bacteria can survive in the soil or plant debris overwintering. Seed surfaces can also carry bacteria, which can spread through the wind, rain and insects, and invade the host’s stomata, epidermis or wounds. At a temperature of 26 ~ 28 ℃, humidity