ABSTRACT
Two years data on tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), populations occurring during the time a cotton crop grew its first 5 fruiting nodes are presented. These populations were correlated to percent square set when cotton plants were approximately 10 nodes tall. Plant bug populations were described using "Lygus days". These data were collected on Sure-grow 125 cotton and DPL NuCotn 33B. The data collected from NuCotn 33B in a production setting allowed the authors to examine the early season relationship between percent fruit set and plant bugs without interference from bollworms, Helicoverpa zea (Boddie), and tobacco budworms, Heliothis virescens F. The difference between years was significant; however, the relationship between plant bug populations and percent set were similar. A combined analysis was used to refine the relationship between "Lygus days" and percent fruit set.
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