Analysis - view details of type of pest/disease/disorder |
Symptoms | Discoloration, deformation and necroses on leaves or needles. Nitrogen-deficiency: light green leaves/needles, reduced in size; Manganese deficiency: yellow-green leaves/needles, partly browning, yellow interveinal necroses; Kali deficiency: chlorosis extending from the rim of the leaf; Phosphonate deficiency: violet-red to blue-grey discoloration; Iron deficiency: yellow leaves or yellow-white interveinal necroses with sharply delimited green veins. | |
Impact | Deficiency of one or more nutrients (also inbalances of nutrients may lead to deficiency of single nutrients). Susceptibility to diseases increased, stunted growth.
Further information: the BFW operates an Austria-wide bio-monitoring for Norway spruces and pines (ca. 1500 trees/year) to assess the nutrient supply (Bioindikatornetz). |
|
Control | Special fertilisation following analysis of nutrients in leaves/needles or/and the soil. | |
Hosts | All tree species; | |
Affected plant parts | Leaf; Needle; Shoot/Twig/Branch; Stem; |