| Autor: |
Culbreath AK; Department of Plant Pathology, The University of Georgia, Coastal Plain Experiment Station, 2360 Rainwater Road, Tifton, GA 31793-0748., Kemerait RC Jr; Department of Plant Pathology, The University of Georgia, Coastal Plain Experiment Station, 2360 Rainwater Road, Tifton, GA 31793-0748., Brenneman TB; Department of Plant Pathology, The University of Georgia, Coastal Plain Experiment Station, 2360 Rainwater Road, Tifton, GA 31793-0748., Cantonwine EG; Department of Biology, Valdosta State University, 1500 N. Patterson St., Valdosta, GA 31698., Rucker KS; Bayer CropScience, Tifton, GA 31793. |
| Abstrakt: |
In peanut ( Arachis hypogaea ) 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 ( Frankliniella fusca ). Fluopyram is also active against many fungal pathogens. However, the effect of in-furrow applications of fluopyram on early leaf spot ( Passalora arachidicola ) or late leaf spot ( Nothopassalora personata ) 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. |
