Venturia (fungus)

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Apple scab (Venturia inaequalis)

Venturia is a genus of ascomycetes ( Ascomycota ) from the order Pleosporales. The fungi cause diseases of fruit trees and other deciduous trees, which are called scab.

Types (selection)

The following species are of particular importance:

• Pfirsichschorf (Venturia carpophila ), affects besides peaches nectarines, apricots, plums and almonds.
• Kirschenschorf (Venturia cerasi )
• Apple scab (Venturia inaequalis)
• Venturia macularis, at Poplar
• Scab (Venturia pyrina )
• Weidenschorf (Venturia saliciperda )

At Firethorn we find the imperfect fungus Spilocaea pyracanthae.

Spread and to control

The mushrooms themselves winter on the fallen leaves as ascospores (winter spores), which can be thrown in the rain in the spring and infested with a sufficiently long period of rain leaves or fruits, which they only penetrate the cuticle. The maximum of the spores flight often coincides with the flowering of fruit crops. In the summer form at the affected sites conidia (summer spores).

The raking or raking the fallen foliage and its proper composting is used to protect against excessive infestation. This measure can also be performed at best in the small garden. The commercial cultivation protects the trees still through on a warning service ( Schorfprognose ) based, the new date targeted application of plant protection products. A suitable for the types of core fruits biological fungicide is the bacterium Bacillus subtilis strain QST 713