Scolytinae, a large group of Coleoptera, are a vital community that causes forest damage. Species such as Pityokteines curvidens (Germar), Orthotomicus erosus (Wollaston), Tomicus destruens (Wollaston), Tomicus minor (Hartig) and Ips sexdentatus (Boerner) are particularly prevalent in the region. In recent years, the prevalence of bark beetle species causing tree damage in the Bursa province has increased. The purpose of this study was to determine the predator species of bark beetles responsible for causing damage in the forest areas of the Bursa province. Specimens were collected from 8 sites in the study area and identified as belonging to 25 species in 2 orders and 12 families. In study found that species such as Synuchus vivalis (Illiger), Opilo taeniatus (Klug), Trichodes apiarius (Linnaeus), Anthrenus scrophulariae (Linnaeus), Trogoderma angustum (Solier), Trogoderma glabrum (Herbst), Ampedus cinnaberinus (Eschscholtz), Cylister angustatus (Hoffmann), Cylister filiformis (Erichson), Rhizophagus depressus (Fabricius), Rhizophagus dispar (Paykull), Ipidia binotata (Reitter), Corticeus linearis (Fabricius), Corticeus pini (Panzer), Nemosoma elongatum (Linnaeus) and Dichrostigma flavipes (Stein) represent new records for both the Marmara Region and the Bursa province. It has been observed that eight species of insects, region Clerus mutillarius (Fabricius), Thanasimus formicarius (Linnaeus), Aulonium ruficorne (Oliver), Cylister elongatus (Thunberg), Hypnogyra angularis (Ganglbauer), Megalinus scutellaris (Fauvel), Corticeus fraxini (Kugelann) and Temnochila caerulea (Olivier), have set new records for both the Marmara Region and the Bursa province of Turkey. Additionally, the presence of these species in the Bursa province represents a new record for the area. These findings were obtained through extensive studies of the insect populations in these regions.
Many of the species that cause damage to pine trees by feeding on needle leaves, and trees without leaves may be vulnerable to secondary pests as well as increment loss. One of the important leaf pests that damage Turkish red pine (Pinus brutia) and the Anatolian Black pine (Pinus nigra A.Rich) in Turkey is the pine sawfly Neodiprion sertifer (Geoff.). Only mechanical and chemical control methods are carried out with this pest. Due to the negative effects of chemical control methods on the ecosystem and nature, alternative methods have come to the fore front in recent years. One of them is the use of essential oils against harmful insects. The aim of the study is determine to larvicidal effects of some essential oils against larvae of N. sertifer. To achieve of this aim our objective is applied three different dosages (0.1%, 0.5% and 1.0%) of essential oils obtained from Eucalyptus camaldulensis, Melissa officinalis and Origanum onites plants to the 4th and 5th instar larvae of pine sawfly. Trials were carried out in the laboratory under controlled conditions (25±5°C temperature and 65±5% proportional humidity). Dead larvae in each box were counted 12, 24, 36 and 48 hours after application. According to the application dosages, the highest deaths of N. sertifer larvae occurred at 1% doses of all three essential oils. It was observed that the larval mortality rates increased as the dosages increased. As a result, essential oils of all three plant species were found to be hopeful in the controlling of N. sertifer, of which essential oil of O.onites was found more effective on the 4th and 5th instar larvae than the essential oils of the other two plant species. They have shown that essential oils can be a potential alternative to synthetic insecticides in the control of pine sawfly. , , ,,
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