泾河川道地区是彬县蔬菜主产区，２００２年露地番茄定植不久早疫病、病毒病发生流行，发病之早、发病之快、发病之重为历年所罕见，造成严重减产和经济损失。一般田块减产达６０％～７０％，１／３的田块绝收。两种病害之所以发生流行，适宜的气象条件是主导因素。１发病特点 The Jinghe River Road area is the main vegetable producing area in Binxian County. In 2002, the early tomato blight was planted early in the open fields and the viral disease was prevalent. The incidence of the disease was very early and the incidence was so rapid that it was rare for the past few years, resulting in serious loss of production and economic losses. The general yield reduction of 60% to 70%, 1/3 of the fields must be absolutely closed. The prevalence of the two diseases occurred, the appropriate weather conditions is the dominant factor. 1 incidence characteristics