In vivo‐Untersuchungen zur Entstehung und Funktion der Chlamydosporen von Botrytis cinerea Pers. am Wirt‐Parasit‐System Fuchsia hybrida – B. cinerea

In vivo‐investigations on the formation and function of chlamydospores of Botrytis cinerea Pers. in the host‐parasite‐system Fuchsia hybrida–B. cinerea On naturally with Botrytis cinerea Pers. infected and artificially inoculated outdoor‐ and greenhouse‐plants of Fuchsia hybrida the extra‐ and intramatrical formation of the B. cinerea‐ chlamydospores was investigated. The chlamydospores served 1. as structures of survival, which were tested with regard to their tolerance of drought, nutrient‐ and oxygen‐deficiency, attack by bacteria and pH‐requirements. 2. The chlamydospores represented dispersal units, which were capable of germination. 3. The chlamydospores could function as structures of infection, because after chlamydospore germination the outgrowing mycelium – either directly or after production of macroconidia – could serve as secondary inoculum and start new infections.