Overwintering Strategy and Cold Hardiness of Lobesia botrana (Lepidoptera: Tortricidae) Pupae in Vineyards of Qazvin Province: Practical Management Approaches | ||
| مجله ترویجی انگور | ||
| Volume 7, Issue 2 - Serial Number 13, March 2026, Pages 46-55 PDF (531.76 K) | ||
| Author | ||
| Neda Pirmoradi Amozegarfard* | ||
| Researcher in Qazvin Agricultural and Natural Resources Research and Education Center | ||
| Abstract | ||
| The European grapevine moth, Lobesia botrana (Denis & Schiffermüller), is one of the key pests of vineyards in Iran, causing considerable quantitative and qualitative damage to grape production. The persistence of its populations largely depends on the ability to enter diapause at the pupal stage and tolerate low winter temperatures. In this study, the overwintering pattern and cold-hardiness characteristics of diapausing pupae were investigated. The results indicated that diapause was induced by photoperiod shortening to below 13 hours in early October, and pupae mainly sheltered beneath the bark, among plant residues, and within the upper soil layers. The supercooling point (SCP) of pupae decreased to as low as –25.86 °C. Cold tolerance reached its maximum in January and February and gradually declined with rising temperatures, indicating the termination of diapause. Investigating diapause traits and cold-hardiness mechanisms across different climatic regions, including Qazvin Province, can contribute to a better understanding of the pest’s ecology and prediction of its population dynamics. The outcomes of such studies not only reveal the adaptability of the pest to cold environments but also provide valuable insights for developing integrated pest management (IPM) programs and determining optimal control timings in vineyards. | ||
| Keywords | ||
| Lobesia botrana; cold hardiness; diapause; cold tolerance; supercooling point; Qazvin | ||
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