多年的生产实践和试验证明,对花生叶斑病的化学防治应坚持“五不要”原则: 一、不要盲目喷施杀菌剂一般应掌握在田间病叶率达10%时,开始进行第一次喷药,以后每隔10天左右喷1次,视发病情况,连喷2～4次。二、不要连续使用同一种杀菌剂连续使用同一种杀菌剂,特别是连续使用多菌灵或甲基托布津,很容易引起叶斑病菌产生抗药性,致使药效降低,防治效果差。 Years of production practices and tests show that the chemical control of peanut leaf spot should adhere to the principle of “five do not”: First, do not blindly spray fungicides generally should be in the field when the rate of leaf disease reached 10%, began to carry out A spray, spray after every 10 days or so, depending on the incidence, and even spray 2 to 4 times. Second, do not continuously use the same fungicide Continuous use of the same fungicide, especially continuous use of carbendazim or thiophanate-methyl, it is easy to cause leaf spot pathogens produce resistance, resulting in lower efficacy, prevention and control of poor.