# Current Problems of Forest Protection (25-27 October 2022, Katowice Poland)
## 11 **Intermediate-Term Forecasting Nun Meth Outbreaks**
Two variants of the experiment were conducted, in which Mospilan 20 SP was applied at a dose of 0.3 kg or 0.4 kg mixed with 1 L of Ikar 95 EC adjuvant and 2 L of water per 1 ha of pine stand. In the trials with Dimilin 480 SC, 0.1 L of the preparation and 7 L of Ikar 95 EC adjuvant and 2.2 L of water per 1 ha were used. In the experimental treatment, pine stands were sprayed by a Dromader M18 aircraft equipped with AU 5000 atomizers. The control of the experiment was unsprayed stands. After the pest control treatment, the fall of live and dead woodworms from the canopies was monitored every day for five days. Three weeks after treatment, the control trees were felled and the number of live and dead insects in the crowns was counted. Based on the results of the insect fall and the number of opiates found in the crowns of the control trees, pest mortality in the plots of the treatment variants and in the control was calculated as a percentage. The results of the experimental treatment with Mospilan 20 SP at doses of 0.3 and 0.4 kg/ha showed a mortality of no more than 30% of the individuals feeding in the crowns of the trees within three weeks after treatment. These results indicate low efficacy of the insecticide used to protect the forest against _Barbitistes constrictus_. In the stands sprayed with Dimilin 480 SC, it was 93.2%. **Keywords:**_Barbitistes constrictus_; pest insects; Mospilan; Dimilin  
**Great Capricorn Beelle (_Cerambyx cerdo_ Linnaeus, 1758) in the Oda Valley--Species Protection and Forest Management**  
Andrzej Mazur \({}^{1}\), Jaroslaw Goral \({}^{2}\), Katarzyna Nowik \({}^{2}\), Katarzyna Skalecka \({}^{2}\), Grzegorz Rogowski \({}^{2}\) and Radoslaw Witkowski \({}^{1}\)  
\({}^{1}\) Poznan University of Life Sciences, Poznan, Poland  
\({}^{2}\) General Directorate of the State Forests, Forest Protection Unit in Wroclaw, Poland  
\({}^{*}\) Correspondence: andrzej.mazur@up.poznan.pl  
**Abstract:** The great capricorn beetle is one of the largest beetles developing in the wood of oaks and other deciduous trees. In Poland, the species locally occurs, and its typical biotope are stands of river valleys, with the share of old oaks growing in exposed positions. The species also inhabits trees in parks, alleys and dikes. Since 1952, the great capricorn has been a subject of legal protection in Poland (it is also protected under the EU Habitats Directive 92/43/EEC). One of the most frequently described conflict situations is the presence of the great capricorn beetle on monumental trees, which are also subject to legal protection. In the forest of the Regional Directorate of State Forests in Wroclaw, located in the Odavalley, in recent years, an increase in the population of the great capricorn beetle has been observed, which results in the colonization of trees of high economic value in managed stands. The presentation describes the spread of the species in the natural environment and the conflict between species conservation and wood production, especially where the great capricorn beetle is abundant. In managed forests, no inventory of new occurrence sites of the species has been made, and population size is not monitored. On the other hand, trees inhabited by _Cerambyx cerdo_, with clear symptoms of its presence, due to the strict legal protection of the species, cannot be cut down. On the basis of available data on the biology and ecology of the species, factors potentially influencing the success of the great capricorn beetle populations were discussed: the impact of high temperatures (observed since 2015); drought resulting in the decreased condition of trees (groundwater level decrease, even in river valleys); the age and structure of forest stands (over 11,000 ha of oak stands over 140 years old), as well as little or no pressure from forest management. Suggestions for economic, protective and compensatory measures in managed stands with the great capricorn beetle population were presented.