Damping-off
for example by too much water, too high or low temperatures or sudden fluctuations in temperature. Pythium aphanidermatum mostly occurs at higher temperatures [...] f disease. In slightly older plants, the leaves lose their turgor or the leaf tips turn yellow, for example in flower bulbs. At first, the plants recover [...] s and is therefore not a real fungus. It survives as oospores, resting spores which are resistant to unfavourable conditions, especially dehydration.