Popis článkuPrvní výsledky z monitoringu poškozených lesních porostů nedestruktivní metodou
[First results from monitoring of damaged forest stands using a non-destructive method] 151-154
|Název článku:||První výsledky z monitoringu poškozených lesních porostů nedestruktivní metodou|
|Autor:||Pavel Tóth, Marie Zahradníková, Petr Zahradník|
In this article we present results of a pilot study focused on the relationship between heartrot in spruce stems caused by Armillaria ostoye and the invasion of Ips typographus. We used an acoustic tomograph taking in the consideration the fact that it has not been employed so far in the Czech Republic for a study like that. Spruce stands not exceeding age of 30 years, which had been weakened by long-term drought period were measured. The fungal mycelium of the pathogen was observed in 6.4% of the trees investigated. More than 60% of trees showed no signs of cambioxylophagous insects attack. A relationship between mycelium intergrowth and occurrence of hollows inside the measured trees was confirmed. Weak relationship between the insects and occurrence of hollows was found in these age-structure spruces.