Nischwitz C, Csinos A S, Mullis S W, Hickman L L, Stevenson K L, Gitaitis R D
Department of Plant Pathology, University of Georgia, Coastal Plain Experiment Station, Tifton 31793-0748.
Plant Dis. 2008 Nov;92(11):1524-1528. doi: 10.1094/PDIS-92-11-1524.
Tomato spotted wilt virus (TSWV) has become the most serious problem in flue-cured tobacco in Georgia and is a growing problem in other tobacco-growing areas in the United States. The effects of transplant age (6 to 10 weeks), tobacco cultivar (K-326 and NC-71), and preplant applications of acibenzolar-S-methyl (ASM) and the insecticide imidacloprid (IMD) were evaluated on levels of TSWV infection, number of symptomatic plants, and yield in field trials over 4 years. In all 4 years and in four of five trials, treatment of transplants with ASM and IMD resulted in fewer symptomatic plants, smaller areas under the disease progress curve (AUDPC), and higher yields compared with the nontreated controls. There were no consistent effects of transplant age or cultivar on number of symptomatic plants or systemic infections, AUDPC, or yield. Treatment of transplants with ASM and IMD can significantly reduce the number of symptomatic plants in the field and substantially increase yields and value per hectare.
番茄斑萎病毒（TSWV）已成为佐治亚州烤烟种植中最严重的问题，并且在美国其他烟草种植区也日益严重。在4年的田间试验中，评估了移栽苗龄（6至10周）、烟草品种（K-326和NC-71）以及种植前施用苯并噻二唑-S-甲酯（ASM）和杀虫剂吡虫啉（IMD）对TSWV感染水平、发病植株数量和产量的影响。在所有4年以及五分之四的试验中，与未处理的对照相比，用ASM和IMD处理移栽苗可减少发病植株数量，降低病害进展曲线下面积（AUDPC），并提高产量。移栽苗龄或品种对发病植株数量、系统感染、AUDPC或产量没有一致的影响。用ASM和IMD处理移栽苗可显著减少田间发病植株数量，并大幅提高产量和每公顷产值。
