Research Note Conidia of the obligate parasite Uncinula necator (conidial stage Oidium tuckeri) were cultured at various temperatures and subsequently observed during germination. Spores that produced at low temperatures had a higher germination rate at low temperatures compared to spores that developed at high temperatures. However, the latter still germinated at very high temperatures. VITIS - Journal of Grapevine Research, Vol. 34 No. 1 (1995): Vitis