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Foliar application of systemic insecticides disrupts feeding behavior of the whitefly Bemisia tabaci MEAM1 and the transmission of tomato chlorosis virus in potato plants
Journal of Pest Science ( IF 4.8 ) Pub Date : 2021-01-27 , DOI: 10.1007/s10340-021-01333-y
Nathalie Kristine Prado Maluta , João Roberto Spotti Lopes , Elvira Fiallo-Olivé , Jesús Navas-Castillo , André Luiz Lourenção

The whiteflies of the Bemisia tabaci (Genn.) complex (Hemiptera: Aleyrodidae) are serious agricultural pests that cause severe losses to vegetable, ornamental and fiber crops, including potato plants, mainly as a vector of economically important viruses. Among the most important viruses affecting potato is tomato chlorosis virus (ToCV) (Closteroviridae: Crinivirus), which is semi-persistently transmitted by whiteflies of the genera Bemisia and Trialeurodes. Chemical control is the main method used to manage B. tabaci and ToCV; however, this whitefly is resistant to most commercially available insecticides, and some products may not effectively prevent the vector stylet activities associated with virus transmission. The effective management of B. tabaci is crucial to reduce the spread of vector-borne diseases, and to minimize economic losses. We evaluated the effects of the foliar spraying with the systemic insecticides acetamiprid, flupyradifurone and cyantraniliprole on the probing behavior of non-viruliferous and ToCV-viruliferous B. tabaci MEAM1 and ToCV transmission in potato plants. To evaluate ToCV transmission in greenhouse conditions, viruliferous whiteflies were released on potato plants at different time points (3, 24 and 72 h and 7 days) after insecticide spraying. The EPG assay showed that at 3 h after insecticide application, the probing behavior differed, depending mainly on the state of the insects (viruliferous or not), whereas 72 h after application, the probing behavior differed only on plants treated with acetamiprid and flupyradifurone, for both viruliferous and non-viruliferous whiteflies. ToCV transmission was reduced mainly in plants treated with flupyradifurone and acetamiprid, likely as a result of phloem activity disruption.



中文翻译:

叶面施用系统杀虫剂会破坏粉虱烟粉虱烟粉虱MEAM1的摄食行为以及番茄绿化病毒在马铃薯植株中的传播

在的粉虱烟粉虱(。金恩)复合物(半翅目:粉虱科)是严重的农业害虫造成严重损失,蔬菜,观赏性和纤维作物,包括马铃薯植株,主要表现为经济上重要的病毒载体。影响马铃薯的最重要病毒是番茄绿化病毒(ToCV)(梭状病毒Crinivirus),该病毒是由BemisiaTrialeurodes属的粉虱半持久地传播的。化学控制是管理烟粉虱的主要方法和ToCV;但是,这种粉虱对大多数市售杀虫剂具有抗性,并且某些产品可能无法有效阻止与病毒传播相关的媒介探针活动。烟粉虱的有效管理对于减少媒介传播疾病的传播以及使经济损失最小化至关重要。我们评估了叶面喷洒全身性杀虫剂对乙酰氨基酚,氟吡呋酮和氰基环丙丙烯酰胺对非毒和ToCV毒力烟粉虱的探测行为的影响马铃薯植物中的MEAM1和ToCV传播。为了评估温室条件下ToCV的传播,在喷洒杀虫剂后的不同时间点(3、24、72 h和7天),马铃薯植株上释放了有毒粉虱。EPG分析表明,在施用杀虫剂后3 h,探测行为有所不同,这主要取决于昆虫的状态(有毒或无毒),而在涂敷杀虫剂72 h后,探测行为仅在用乙酰胺和氟吡呋酮处理的植物上有所不同,适用于有毒和无毒粉虱。ToCV的传播主要是在用氟吡呋喃酮和乙草胺处理过的植物中减少了,这可能是韧皮部活性受到破坏的结果。

更新日期:2021-01-28
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