Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Germination of sclerotia and ergot development by ascospores of Claviceps fusiformis in pearl millet.

Abstract

In sterilized field soil sclerotia germinated after 40 d at 28°C ± 1° with continuous high moisture. Percentage germination was higher in sclerotia buried partially or at 1 cm depth, those placed below 4 cm failing to germinate. On germination, the sclerotia produced 1-12 stromata. The stipes measured 4-6 × 0.5 mm and capitula were globose with broadly pyriform perithecia containing cylindrical asci. The ascospores produced the disease when protogynous inflorescences of Pennisetum americanum were exposed to germinated sclerotia but conidial inoculum had greater potential for disease development.