McPherson R M, Pappu H R, Jones D C
Department of Entomology.
Department of Plant Pathology.
Plant Dis. 1999 Aug;83(8):765-767. doi: 10.1094/PDIS.1999.83.8.765.
Thrips-vectored tomato spotted wilt tospovirus (TSWV) infection is a major constraint on tobacco production in Georgia. Flue-cured tobacco fields were surveyed throughout the season from 1989 to 1991 and 1996 to 1998 to determine spotted wilt disease incidence and seasonal abundance and species composition of thrips populations. Five species were commonly found that accounted for more than 95% of the 17,000 thrips collected, including Frankliniella fusca, F. occidentalis, F. bispinosa, F. tritici, and Limothrips cerealium. F. fusca, F. occidentalis, and F. bispinosa are vectors of TSWV. F. fusca was the most common foliage thrips collected during all years, except 1989, when L. cerealium was the most abundant species. During 1989 to 1991, 22 to 68% of the foliage and flower thrips identified were TSWV vector species. The 1996 to 1998 foliage collections had much higher percentages of vector species (95 to 97%). The 1996 flower samples also had a very high percentage of vector species (94%); however, the percentages were much lower in 1997 (3%) and 1998 (32%). A trend toward higher incidence of TSWV occurred during the last three seasons studied, when thrips vector species were more abundant.
蓟马传播的番茄斑萎病毒（TSWV）感染是佐治亚州烟草生产的主要限制因素。在1989年至1991年以及1996年至1998年的整个季节对烤烟田进行了调查，以确定斑萎病的发病率、蓟马种群的季节性丰度和物种组成。共发现五种常见蓟马，占所采集的17000只蓟马的95%以上，包括烟蓟马、西花蓟马、二斑蓟马、小麦蓟马和禾蓟马。烟蓟马、西花蓟马和二斑蓟马是TSWV的传播媒介。除1989年禾蓟马为最丰富的物种外，烟蓟马是所有年份采集到的最常见的叶部蓟马。在1989年至1991年期间，鉴定出的叶部和花部蓟马中有22%至68%是TSWV传播媒介物种。1996年至1998年的叶部采集样本中传播媒介物种的百分比要高得多（95%至97%）。1996年的花部样本中传播媒介物种的百分比也非常高（94%）；然而，1997年（3%）和1998年（32%）的百分比要低得多。在所研究的最后三个季节中，当蓟马传播媒介物种更为丰富时，TSWV的发病率呈上升趋势。
