Department of Plant Pathology, The University of Georgia, Coastal Plain Experiment Station, 2360 Rainwater Road, Tifton, GA 31793-0748.
Department of Biology, Valdosta State University, 1500 N. Patterson St., Valdosta, GA 31698.
Plant Dis. 2021 Sep;105(9):2374-2379. doi: 10.1094/PDIS-01-21-0052-RE. Epub 2021 Oct 17.
In peanut () production, in-furrow applications of the premix combination of the succinate-dehydrogenase-inhibitor (SDHI) fungicide and nematicide fluopyram and the insecticide imidacloprid are used primarily for management of nematode pests and for preventing feeding damage on foliage caused by tobacco thrips (). Fluopyram is also active against many fungal pathogens. However, the effect of in-furrow applications of fluopyram on early leaf spot () or late leaf spot () has not been characterized. The purpose of this study was to determine the effects of in-furrow applications of fluopyram + imidacloprid or fluopyram alone on leaf spot epidemics. Field experiments were conducted in Tifton, GA in 2015, 2016, and 2018 to 2020. In all experiments, in-furrow applications of fluopyram + imidacloprid provided extended suppression of early leaf spot and late leaf spot epidemics compared with the nontreated control. In 2020, there was no difference between the effects of fluopyram + imidacloprid and fluopyram alone on leaf spot epidemics. Results indicated that fluopyram could complement early-season leaf spot management programs. Use of in-furrow applications of fluopyram should be considered as an SDHI fungicide application for resistance management purposes.
在花生生产中，主要采用沟施混剂（琥珀酸脱氢酶抑制剂（SDHI）杀菌剂和噻虫嗪）和杀虫剂噻虫啉来防治线虫害虫，并防止烟蓟马对叶片的取食危害（）。噻虫嗪对许多真菌病原体也有活性。然而，沟施噻虫嗪对早期叶斑病（）或晚期叶斑病（）的影响尚未得到描述。本研究旨在确定沟施噻虫嗪+噻虫啉或单独沟施噻虫嗪对叶斑病流行的影响。2015 年、2016 年、2018 年至 2020 年在佐治亚州蒂夫顿进行了田间试验。在所有试验中，与未处理对照相比，沟施噻虫嗪+噻虫啉可延长早期叶斑病和晚期叶斑病的防治期。2020 年，噻虫嗪+噻虫啉和单独使用噻虫嗪对叶斑病的防治效果没有差异。结果表明，噻虫嗪可以补充早期叶斑病的防治计划。考虑将沟施噻虫嗪作为 SDHI 杀菌剂的应用，以达到抗性管理的目的。
