The beech treated in this example has been infected for about 8 years. Only two years ago the owner noticed the fungus and contacted an arborist who immediately started the treatment using the bio-control, Trichoderma. Upon the 3rd year of the treatment no new fruiting bodies were evident, and therefore no extended legions, while the older fragile crust fell away from the trunk.
The development of Kretzschmaria can be measured by a reduction in stability. For this beech the annual tensile tests proved positive. In addition to the tensile tests, the internal decomposition of the wood will be recorded using a PICUS sonic tomograph. The tree can compensate with wood growth in the relevant areas along the lower trunk area. The loss of vitality is acceptable for the owner and his wish is to keep the old beech in his park garden as long as possible. The loss of vitality is indicated by the thinner and lighter canopy of the tree, which consequently also reduces the strain on the trunk.
Annual treatment with Trichoderma atrobrunneum (formerly harzianum) 1×108 KBE/ml:
– Spraying the fruiting body with liquid solution (30-100 ml spore solution diluted with 1 L water) in dry weather conditions below 30 °C, several times a year.
– Watering of and around the roots within the shaded area underneath the crown with water spore solution (2-10 ml per L water, 1 L water per 1 m²), several times a year in humid soil conditions.