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    Brevibacillus choshinensis restricts harmful Eurygaster integriceps in wheat-sown fields and enhances beneficial insect population
    (Springer Science and Business Media LLC, 2025-02-03) Halil Dilmen; Fatih Çiğ; Mustafa Ceritoğlu
    This study was conducted to determine the effects of plant growth-promoting bacteria (Brevibacillus choshinensis) on Eurygaster integriceps Puton, 1881 (Hemiptera: Scutelleridae) and the predators Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) and Coccinella septempunctata L. (Coleoptera: Coccinellidae) during the 2022–2023 season. The study was laid out according to a completely randomized factorial design with five replications, including areas with and without B. choshinensis application. Sampling was carried out every 7 days until the harvest period. Predator insect species C. carnea, C. septempunctata and Sunn pest (E. integriceps) found in wheat plots were determined using the visual counting method. According to the results, B. choshinensis treatment boosted beneficial insect population and restriced E. integriceps over control plants. E. integriceps population reduced up to 75%, 100%, 66% and 92% compared to control at the 1st., 2nd., 3rd. and 4th. observation times, respectively. In addition, foliar B. choshinensis treatment reduced E. integriceps population by 6.3-fold (from 0.63 to 0.10) over control plots. Number of beneficial insects per plot were determined as 1.35 and 6.75 at control and PGPB treatmen, respectively, therby increasing by 5-fold over control. In conclusion, it is thought that B. choshinensis can be an alternative bio-insecticide that can be used to control the harmful insect population and to encourage the beneficial insect population. In addition, new researches are needed to understand the mechanisms by which B. choshinensis treatment suppresses E. integriceps populations while attracting beneficial insect communities.
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    Control Effectiveness of Kaolin Clay and Neem on Agonoscena pistaciae in Pistachio Orchards
    (MDPI AG, 2025-03-29) Halil Dilmen; Mehmet Salih Özgökçe; Cevdet Kaplan; Hilmi Kara
    The pistachio psyllid (Agonoscena pistaciae) is a major pest threatening pistachio production in Siirt province, Türkiye. This study evaluated the efficacy of a clay mineral, kaolin, and a botanical insecticide, neem extract, in managing this pest, aiming to reduce the reliance on chemical pesticides. Field experiments were conducted to compare the performance of these treatments with that of the synthetic insecticide spirotetramat SC 100 at various application rates. The results demonstrated that kaolin significantly reduced oviposition rates, achieving up to 100% deterrence, while neem extract exhibited substantial nymph mortality rates of up to 84.75%. These findings highlight the potential of mineral- and plant-based alternatives as effective components of integrated pest management strategies for pistachio psyllid control, offering sustainable and environmentally friendly solutions for minimizing economic losses and pesticide residues in pistachio production.