Norway maple leaf affected by a fungal disease called tar spot of maple,caused by Rhytisma acerinum. It is one of the least damaging ailments of the host. Related Rhytisma punctatum is generally distributed in the northern parts of North America. R. acerinum is sensitive to sulfur dioxide,a common pollutant,and for this reason,the disease seldom occurs in urban or industrial areas and is,actually,an indicator of an atmosphere free of the pollutant | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / SciMAT |
Taille de l’image : | 3067 px × 2550 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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