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F.A.Todd教授撰写的“系统防治”(System Control)是为了适应烟草病害既复杂又多变,单一的防治方法极难生效,也是为了烟草生产因新技术的施行,生产的统一,集中和机械化程度增加的趋向,劳动力紧张而发生的一系列变化以及生产安全产品的需要.系统防治是总结了1966～1977年十一年来,群众性的850个试验和广大烟农的意见而产生的,是从实践中来的防治方法.本文列举了五种烟草主要病害在北卡罗里纳州分布,为害现状,及决断其侵染水平的准则. 系统防治可归六类,即A、B、C、D、E和F,每一防治系统各不相同.系统A是为有危急病害的大田设计的,系统B是为连作大田设计的,系统C是为土地较多,可规划适当轮作的农场设计的,系统D是为土地充足可广泛选用品种设计的,系统E是为黑胫,青枯侵染水平很低,根瘤虫口低→高的大田设计的,系统F是为最近未观察到病害损伤大田设计的.使用系统防治,制订系统规划,其程序有五:第一,决断存在的主要病害是什么;第二,病害的侵染水平怎样;第三研究生产方法和规划;第四,选定一种系统;第五,制定防治作法的规划.做法有七,它们是:施行操作R-9-P,选定耕作制,挑取适合所选系统的抗病品种,防治苗病害,抑制花叶病,挑取适合所选系统的化学土壤处理和防治褐斑病.最后列举了九条应用系统防治的注意事项. 系统、程序和做法的搭配取舍是依据病情和生产情势,体现了因地制宜,因条件而变化的伸缩性.美国烟草生产情况和我国不同,但烟草病害的种类和为害程度则与我国有许多相似处,因而本文对我国烟草病害防治是有参考价值的.
Professor Fatodd’s “System Control” is designed to adapt to the complexity and variety of tobacco diseases. A single approach to prevention and control is extremely difficult to achieve. It is also due to the harmonization, concentration and mechanization of tobacco production due to the implementation of new technologies, production, Increasing trends, a series of changes in the labor force and the need for production of safe products.System control is summarized from the 1966 ~ 1977 eleven years, the masses of 850 experiments and the majority of tobacco farmers from the views arising from the practice In this paper, the five major tobacco diseases in North Carolina are listed, the status quo and the criteria for determining the level of infection.The system can be classified into six categories: A, B, C, D , E and F. Each system A is designed for critical fields, System B is designed for continuous cropping and System C is designed for farms that can be planned for adequate rotation , System D is designed for a wide range of land-use varieties. System E is designed for fields with low black-tibia and low-QTL infection and low- to high-rooted nodules. System F is for a recently observed disease damage field Assume . The use of system control, the development of system planning, the program has five: First, determine the existence of the main diseases is what; second, the level of disease infection level; third research production methods and planning; Fourth, the selected one The fifth is to draw up a plan for the prevention and control of the disease. There are seven approaches to implementing the R-9-P system: choosing a farming system, picking the resistant varieties suitable for the selected system, Disease, picked for the selected system of chemical soil treatment and prevention and treatment of brown spot disease.Finally listed 9 application system precautions precautions, systems, procedures and practices with the choice is based on the disease and the production situation, reflects the local conditions, due to conditions But the change of scalability.United States tobacco production in our country is different, but the types of tobacco diseases and the degree of harm and our country has many similarities, so this article is of reference value for the prevention and control of tobacco diseases in our country.