{"title":"Insect pests in the forests of Bulgaria and their economic importance","authors":"G. Zaemdzhikova","doi":"10.5604/01.3001.0014.5711","DOIUrl":null,"url":null,"abstract":"Based on the forest-pathological inventories for the last 30 years, the economic importance of the insect pests in the Bulgarian forests and its dynamics for the periods 1990–2002 and 2003–2018 were determined. Insect pest attacks have declined sharply in the last sixteen years- in coniferous forests they have decreased three times and in deciduous ones - almost six times. Generally, the health status of the forests, with regard to pest status, after 2003 is improving, and this is more clearly expressed in the deciduous forests. As a result of this development, the pest control measures areas gradually shifted from deciduous to coniferous forests. Since 2003, deterioration in the health status of ageing coniferous plantations has been identified, however, with the attacks of two major groups of pests escalating- pine sawflies and bark beetles.\n\n","PeriodicalId":53438,"journal":{"name":"Polish Journal of Entomology","volume":"1 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polish Journal of Entomology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5604/01.3001.0014.5711","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Based on the forest-pathological inventories for the last 30 years, the economic importance of the insect pests in the Bulgarian forests and its dynamics for the periods 1990–2002 and 2003–2018 were determined. Insect pest attacks have declined sharply in the last sixteen years- in coniferous forests they have decreased three times and in deciduous ones - almost six times. Generally, the health status of the forests, with regard to pest status, after 2003 is improving, and this is more clearly expressed in the deciduous forests. As a result of this development, the pest control measures areas gradually shifted from deciduous to coniferous forests. Since 2003, deterioration in the health status of ageing coniferous plantations has been identified, however, with the attacks of two major groups of pests escalating- pine sawflies and bark beetles.
期刊介绍:
The Polish Journal of Entomology was founded in 1922 as a periodical of the Polish Entomological Society under the title Polskie Pismo Entomologiczne (subtitle Bulletin Entomologique de Pologne). The journal publishes original research papers and reviews from any entomological discipline. The Polish Journal of Entomology is sponsored by the Polish Entomological Society and the Ministry of Science and Higher Education. It deals with all aspects of entomology and has no geographical limits. Four issues of the journal are published annually. It is covered by the Zoological Record, Entomological Abstracts, Biological Abstracts. Each article has its own DOI