Ascospore Release of <i>Togninia minima</i>, Cause of Esca and Grapevine Decline in California

Fig. 3. A group of Togninia minima perithecia produced in vitro by crossing isolates of opposite mating types. Ascospore accumulation can be seen at the neck tip of one perithecium.



Image from Plant Health Progress article:
Ascospore Release of Togninia minima, Cause of Esca and Grapevine Decline in California