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    Coleoptera Species Detected on Weeds in Hakkari/Yüksekova Basin
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2024) Sirri, Mesut; Ozaslan, Cumali
    The adverse effects of chemical pesticides on human and environmental health have prompted scientists to seek alternative weed control methods. This study aims to identify natural enemies (insects) feeding on weeds that are prevalent in the Hakkari/Y & uuml;ksekova Basin, which boasts rich biological diversity. The survey was conducted in 2020 and 2021. A total of 56 insect species were identified on 19 weed species belonging to 10 different families. A significant portion of these species (26 species) belonged to the Coleoptera order, specifically the Curculionidae (22 species) and Chrysomelidae (4 species) families. Among the Curculionidae family in the region, it was determined that Lixus elegantulus Boheman, 1843, L . bardanae (J.C.Fabricius, 1787), L . scolopax , Larinus onopordi (Fabricius, 1787), L . minutus Gyllenhal, 1835 and Rhabdorrhynchus anchusae Chevrolat, 1854 species could suppress the growth and seed formation of host weeds. Host testing studies are needed for the use of such potential agents in the biological control of weeds.
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    Impact of climate change on habitat suitability of an endemic herbivore [Hydrothassa anatolica (Chrysomelidae: Chrysomelinae)] in Türkiye
    (Akademiai Kiado Zrt, 2024) Sirri, Mesut; Bal, Neslihan; Farooq, Shahid; Ozaslan, Cumali
    The rich floristic and faunistic diversity of T & uuml;rkiye hosts numerous endemic species, particularly in the southeastern region. Climate change could exert negative impacts on the distribution of endemic species and cause their extinction. Hydrothassa anatolica S,ahin & & Ouml;zdikmen, 2019 (Chrysomelidae: Chrysomelinae) is an endemic species distributed in the Hakkari province of T & uuml;rkiye. This study assessed the impacts of climate change on the habitat suitability of H. anatolica using maximum entropy (MaxEnt) model. The occurrence records of the species were collected through surveys in Y & uuml;ksekova district of Hakkari province during 2022 and 2023 and used in the modeling exercise. Habitat suitability of H. anatolica was predicted for 2021-2040, 2041-2060, 2061-2080 and 2081-2100 under two shared socioeconomic pathways (SSPs), i.e., SSP1-2.6 (low greenhouse gas emissions scenario) and SSP5-8.5 (very high greenhouse gas emissions scenario). A total 12 occurrence records and 9 bioclimatic variables were used to predict the habitat suitability under current and future climatic conditions. The results indicated that bio 6 (minimum temperature of the coldest month) bio18 (precipitation of warmest quarter) will mediate the distribution of H . anatolica under current and future climatic conditions. The areas with wet summers and cold winters were predicted highly suitable for H . anatolica. . The model predicted that the species will expand its distribution range in the future under both climate change scenarios.
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    Natural enemies feeding on some Centaurea species in the Yuksekova basin
    (Elsevier, 2022) Sirri, Mesut; Ozaslan, Cumali; Sert, Osman; Alfarraj, Saleh
    Background: Excessive and unconscious use of pesticides in agricultural areas negatively affects ecosystem services and biodiversity and threatens human and environmental health. Therefore, natural enemies (biological control agents) that could be utilized to suppress the infestation of diseases, pests and weeds have attracted the attention of scientists globally. There are limited studies on the occurrence of natural enemies on Centaurea species in the Yuksekova basin, Turkey. The Yuksekova basin has a rich floristic diversity; however, remained unexplored and underutilized. Limited use of pesticides, and the presence of natural enemies feeding on weeds in the region have recently attracted the attention of researchers for searching biological control agents. Asteraceae is the dominant family in the region with the highest diversity, causing significant yield losses in agricultural area of the basin. Methods: Therefore, preliminary studies were conducted to determine the natural enemies feeding on the genus Centaurea. The region was divided into 10 x 10 cm systematic grids and occurrence of Centaurea species, and their natural enemies were recorded. Results: The survey identified 10 species belonging to Centaurea genus in the study area. Different insect species, i.e., Lixus pulverulentus Scopoli, Larinus grisescens Gyllenhal and Bangasternus orientalis Capiomont belonging to Curculionidae (Coleoptera) family were observed to feed and spend biological periods on Centaurea behen L., Centaurea pterocaula Trautv. and Centaurea iberica Trev. ex Spreng species. Conclusions: It is estimated that the natural enemies recorded on Centaurea species could be potentially used in biological control of the species on which they were recorded in the current study. However, detailed studies on host specificity and efficacy of the identified insect species are needed. (c) 2022 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).