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引言遮荫栽培的雪茄烟包皮叶,必须洁净无斑,方能上市。大气中臭氧浓度增加时,叶面则出现斑点。1963年迪安报告说:佛罗里达州遮荫栽培烟叶斑点病的突然蔓延与大气中臭氧不正常的高浓度有关。作物自身对臭氧的抵抗力已经增强,但长期处于高浓度臭氧的环境中,仍会受到损害。土壤浸透和喷雾某些化学药剂,可以使烟叶免受臭氧之
Introduction Shade cultivation of cigar foreskin leaves, must be clean without spot, before the market. When the concentration of ozone in the atmosphere increases, the leaves appear speckled. In 1963, Dean reported that the sudden spread of spot disease in shady cultivated tobacco in Florida was related to the abnormally high concentrations of ozone in the atmosphere. The crop’s own resistance to ozone has increased, but long-term exposure to high levels of ozone can still be compromised. Soil soaks and sprays certain chemicals that keep the tobacco leaf free of ozone