Abstract
Abstract In a laboratory test, we compared diapausing adult tarnished plant bugs, Lygus lineolaris (Palisot de Beauvois), from Stoneville, MS, and Springfield, IL, for their ability to break diapause when kept at 25°C on a nutritious food source (broccoli, Brassica oleracea variety botrytis L.) under a diapause-maintaining photoperiod of 10:14 light:dark hours. The temperature, photoperiod, and food simulated environmental conditions in the mid-South region during December when overwintering tarnished plant bugs on blooming winter hosts break diapause. It was unknown if plant bugs from areas such as Springfield (upper Midwest) in which the winters are too cold for hosts to be available also had the ability to break diapause under a diapause-maintaining daylength. One-day-old diapausing adults from Stoneville and Springfield were kept in environmental cabinets for 5 weeks. Males and females from both locations were dissected at weekly intervals to determine their reproductive status. Diapausing adults from...
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