Seeds of 2 cultivars of sweet pepper ( Capsicum annuum L.) were invigorated by presoaking in a −8 bar solution of polyethylene glycol-6000 (240 g/liter H 2 O) at 15°C for 5 days. Invigorated seed germinated and emerged faster than noninvigorated in the greenhouse and laboratory, but not in the field. In the last field planting, yield from invigorated ‘Yolo Wonder L.’ was significantly greater than the control seed. Various seed treatments (KC1, KNO 3 , indoleacetic acid and gibberellic acid) in combination with the osmoticum did not affect invigoration.
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Yaklich et al. (1977) studied this question.