01975naa a2200217 a 450000100080000000500110000800800410001902400460006010000150010624501260012126000090024752012990025665000190155565300260157465300300160070000200163070000170165070000140166770000180168177300580169921238502020-10-27       2020    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1653/024.103.02212DOI1 aMORAES, T.  aSurvival and development of fall armyworm (LepidopterabNoctuidae) in weeds during the off-season.h[electronic resource]  c2020  aThe persistence and high dispersal of weeds during the off-season can favor the survival of pests and diseases that threaten cultivated crops in Brazil. The fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), is one of the principal polyphagous pests that takes advantage of the no-tillage system. Despite its pest status, little is known about S. frugiperda survival and development in alternative hosts, including those resistant to glyphosate. The purpose of this study was to investigate, in laboratory and greenhouse conditions, the adaptive capacity of S. frugiperda in volunteer maize and 6 weeds commonly found in Brazilian agroecosystems, including species with biotypes known for glyphosate resistance, such as fleabane, sourgrass, and goosegrass. We found that S. frugiperda survival and biomass were significantly higher in goosegrass, maize, and johnsongrass in both laboratory and greenhouse conditions. In contrast, fleabane, benghal dayflower, sourgrass, and smooth pigweed caused a decrease in S. frugiperda fitness. Along with S. frugiperda adaptive capacity, our results suggest that its persistence in the field can be directly related to weed control inefficiency during the off-season, increasing the demand for integrated pest and weed management.  aSpodoptera spp  aCapacidade adaptativa  aResistência ao glifosato1 aSILVA, A. F. da1 aLEITE, N. A.1 aKARAM, D.1 aMENDES, S. M.  tFlorida Entomologistgv. 103, n. 2, p. 288-292, 2020.