Alternaria brassicae
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_Sacc._Symptoms_on_cabbage.JPG)
White cabbage infestation |
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| Alternaria brassicae | ||||||||||||
| ( Berk. ) Sacc. 1880 |
Alternaria brassicae is a mold of the genus Alternaria , a plant pest and is also called black rapeseed .
In addition to rapeseed, it particularly infects cauliflower, Chinese cabbage and other types of cabbage (similar to Alternaria brassicicola and Alternaria raphani ) but also other vegetable and rose plants.
It causes rot on young plants and dark spots on leaves and inflorescences of older plants.
In rape plants, after heavy rainfall, the disease usually only shows up a short time before harvest on the stem and especially on the pods as black spots caused by the fungus. If there is a lot of moisture, the individual spots flow together, leading to accelerated ripening and thus to premature bursting of the pods. The earlier after the end of flowering the Alternaria appears and the wetter the rape maturation process, the higher the grain losses.
Tolerant varieties are not available and chemical control would have to be carried out preventively and on suspicion with the same means and at the same time as against white stalk . So far there is no way to predict at this point in time whether and how severe the Alternaria will occur.
Web links
Individual evidence
- ↑ Marcin Nowicki, Marzena Nowakowska, Anna Niezgoda, Elżbieta Kozik: Alternaria Black Spot of Crucifers: Symptoms, Importance of Disease, and Perspectives of Resistance Breeding. In: Vegetable Crops Research Bulletin. Vol. 76, 2012, pp. 5-19, doi : 10.2478 / v10032-012-0001-6 .
- ↑ Stephen A. Ferreira, Rebecca A. Boley: Alternaria brassicae. . University of Hawaii, 1991. Retrieved July 18, 2015.