摘要
为了有效防治由多主棒孢霉引起的烤烟叶斑病,调查研究了2016—2018年涪陵烟区主要气象因子、海拔因素和大田因素与该病害发生的关系,初步了解了该病害的发生流行规律。采用6种药剂开展了烤烟棒孢霉叶斑病田间防治试验。结果表明:涪陵棒孢霉叶斑病在6月中下旬开始发病,高温多雨气候有利于其暴发流行,随海拔升高初始发病时间相应推迟,坡地较平地发病重,粘土较壤土发病重,前茬作物为水稻以及氮肥施用最少的烟田发病轻;田间药剂试验显示多菌灵、百菌清和代森锰锌等化学农药防效较好,防效分别达到了87.74%、83.88%和89.08%,微生物农药中枯草芽孢杆菌防效明显好于木霉素,克菌丹防效最差,三者的防效分别为30.12%、14.22%和-4.64%,均显著差于试验化学农药。
In order to prevent and control the leaf spot of flue-cured tobacco caused by Corynespora cassiicola(Berk.&Curt.)Wei,the main meteorological factors,elevation factors and field factors in Fuling district from 2016 to 2018 were investigated,the relationship between the occurrence of Corynespora leaf spot and the above factors was researched,and the regular epidemic pattern of this disease was analyzed.Six fungicides were used to control flue-cured tobacco leaf spot in the field trial.The results showed that Corynespora leaf spot of flue-cured tobacco occured in mid to late June in Fuling;the high temperature and rainy climate was favorable for its outbreak,the initial onset time was delayed as the altitude increased;the incidence of the disease was more serious in the sloping field than in the flat land,more serious in the clay than in the loam,less serious in the previous crop of rice and the tobacco field with the least nitrogen application.The field trial showed that carbendazim,chlorothalonil and mancozeb had good control effects of 87.74%,83.88%and 89.08%respectively.Among the tested microbial fungicides,the control effect of Bacillus subtilis was significantly better than that of trichodermin,Captan had the lowest effect,and their control effects were 30.12%,14.22%and-4.64%respectively,all microbial fungicides were significantly lower than the above three chemical fungicides in the control of Corynespora leaf spot.
作者
陈鑫
CHEN Xin(Fuling Tobacco Company of Chongqing,Chongqing 408000,PRC)
出处
《湖南农业科学》
2020年第4期29-33,共5页
Hunan Agricultural Sciences
基金
重庆市烟草专卖局项目(NY20180401070008)。
关键词
烤烟
棒孢霉叶斑病
流行规律
药剂防治
涪陵
flue cured tobacco
Corynespora leaf spot
epidemic law
chemical control
Fuling district
