The feeding performance of Psyllobora vigintiduopunctata (L.) (Coleoptera: Coccinellidae) on cucurbit powdery mildew, Erysiphe cichoracearum (DC.) (Helotiales: Erysiphaceae) Psyllobora vigintiduopunctata (L.) (Coleoptera: Coccinellidae)’nın Kabakgillerde külleme hastalığı Erysiphe cichoracearum (DC.) (Helotiales: Erysiphaceae) üzerindeki beslenme performansı
Plant Protection Bulletin (Turkey), cilt.66, sa.2, ss.170-181, 2026 (Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 66 Sayı: 2
- Basım Tarihi: 2026
- Doi Numarası: 10.16955/bitkorb.1898469
- Dergi Adı: Plant Protection Bulletin (Turkey)
- Derginin Tarandığı İndeksler: Scopus, TR DİZİN (ULAKBİM)
- Sayfa Sayıları: ss.170-181
- Anahtar Kelimeler: consumption capacity, Cucurbita pepo, Erysiphe cichoracearum, mycophagous, release, The 22-spotted ladybird
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Van Yüzüncü Yıl Üniversitesi Adresli: Evet
Özet
The feeding capacity of Psyllobora vigintiduopunctata on powdery mildew Erysiphe cichoracearum was investigated under laboratory (25±2°C, 70±5%RH, 12:12h photoperiod) and semi-field conditions. Under laboratory conditions, the total powdery mildew-infected area consumed approximately 19 cm² over the entire larval period. Over their lifetime, adult males consumed an average of 195.86±5.48 cm² of infected area, whereas females consumed 225.14±5.48 cm². The semi-field experiments were performed to determine the efficacy of P. vigintiduopunctata against powdery mildew by releasing 10, 15, and 20 adults onto squash plants at the initial stage of infection. Distilled water was used as the control treatment. A commercial fungicide containing 200g/L azoxystrobin and 125g/L difenoconazole (Quadris® Maxx, 80ml/100L water) was applied to infected plants as the positive control treatment. The infected leaf area on squash plants was measured at five-day intervals, and the trials were terminated on day 20. In the control group, the plants were 100% infected with powdery mildew by day 20. The mean disease severity in plants treated with 10, 15, and 20 adult P. vigintiduopunctata was 16.99–17.07%, 12.88–13.42%, and 8.55–8.79%, respectively, on day 20. The average impact factors were calculated as 82.93–83.01%, 86.58– 87.12%, and 91.21-91.45%, respectively. In squash plants that received the fungicide treatment, the severity of powdery mildew increased from day 15 onwards, reaching approximately 11% disease severity and 89% fungicide effectiveness by day 20. These results were in agreement with laboratory-based feeding capacity data and revealed that releasing 20 adult P. vigintiduopunctata per plant at the initial stage of infection can provide highly effective suppression of E. cichoracearum, representing a strong alternative to chemical control strategies.