气候型斑点病是近年发展起来的一种烟草新病害。国外在美国、加拿大、日本等国发生。我国发生在山东、云南、台湾等省烟区。我省各地均有发生,尤以江川、通海发生较多,特别是1975—1976两年受害严重,影响产量和品质。本病在本省曾被认为是一种烟草病毒病,为了正确加以识别和防治,现将有关报道和我所几年来观察资料整理出来,供参考。一、症状:于刚成熟的底叶上发生,发病时叶片正面出现许多密集的、不定形的水浸状小斑,其直径小于1—3毫米,斑点常集中在主脉和侧脉两侧。正在生长伸展的叶片,病斑多集中在叶尖部分。在48小时内,病斑从水浸状变为褐 Climate speckle disease is a new disease developed in recent years. Foreign countries in the United States, Canada, Japan and other countries. My country is in Shandong, Yunnan, Taiwan and other provinces smoke areas. Occurred in all parts of our province, especially in Jiangchuan, Tonghai occurred more, especially serious damage in 1975-1976 two years, affecting the yield and quality. The disease in the province was considered a tobacco virus disease, in order to correctly identify and control, now the relevant reports and my observation data for several years sorted out for reference. First, the symptoms: just ripe on the bottom of the leaves occurs when the incidence of a large number of dense positive on the front of the infiltration of small spots, the diameter of less than 1-3 mm, the spot is often concentrated in both sides of the main vein and lateral veins . Growing blades are growing, spot more concentrated in the tip part. Within 48 hours, the lesion turned from flooding to brown