Fora Ciprian George, Boja Nicușor, Moatăr Mihaela, Tóth Ferenc, Balog Adalbert
Department of Forestry, Faculty of Horticulture and Forestry, Banat's University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timișoara, Calea Aradului 119, 300645 Timișoara, Romania.
Research Institute of Organic Agriculture, Miklós tér 1., 1033 Budapest, Hungary.
Insects. 2022 Sep 29;13(10):885. doi: 10.3390/insects13100885.
The spruce bark beetle, (L.), attack progression (adult and larval galleries) and parental and offspring mortality rate were assessed in managed forests of the Poiana Ruscă and Bihor Mountains, along with Western Romanian Carpathians using fungal () treatments. The results show that the effect of on adult (maternal) gallery length was similar to the untreated variant and was less effective than the synthetic insecticide lambda-cyhalothrin applied at a dose of 50 g/L. Additionally, its effect on the mean larval gallery number per maternal gallery was low. did not have a significant influence on the attack progression. Significant correlations between log diameter and attack progression were detected; such differences were higher than the effect of any treatment. Altogether, abiotic (low humidity, high temperature) and biotic factors (log diameter) influenced the bark beetles' attack progression and reduced the entomopathogenic fungal effects. Considering the efficacy of the treatment on logs infested with , the results showed that parents and offspring were infected, but even if the fungal treatment was applied in high concentrations, the mortality rate remained relatively low. Further research is necessary to test if different strains and their commercially recommended concentrations might be more effective under dry and warm climate conditions, respectively.
在罗马尼亚西部喀尔巴阡山脉的波亚纳鲁斯卡和比霍尔山的人工林中，使用真菌（）处理方法，评估了云杉树皮甲虫（L.）的侵害进程（成虫和幼虫虫道）以及亲代和子代的死亡率。结果表明，对成虫（母体）虫道长度的影响与未处理的变体相似，且不如以50克/升剂量施用的合成杀虫剂氯氟氰菊酯有效。此外，它对每个母体虫道的平均幼虫虫道数量的影响较低。对侵害进程没有显著影响。检测到原木直径对数与侵害进程之间存在显著相关性；这种差异高于任何处理的效果。总体而言，非生物因素（低湿度、高温）和生物因素（原木直径）影响了树皮甲虫的侵害进程，并降低了昆虫病原真菌的效果。考虑到对感染的原木的处理效果，结果表明亲代和子代都受到了感染，但即使以高浓度施用真菌处理，死亡率仍然相对较低。有必要进行进一步研究，以测试不同的菌株及其商业推荐浓度在干燥和温暖气候条件下是否可能更有效。
