New host-plant record for Plutella xylostella (L.) (Lepidoptera: Plutellidae) from Türkiye

Abstract

Sunflower [Helianthus annuus L. (Asteraceae)] is a crop of considerable significance in agricultural production. This study was conducted during the 2023 growing season in Tokat Province to identify harmful Lepidoptera species associated with sunflower and their natural enemies. Preimaginal stages were periodically collected from sunflower fields at various phenological stages of the plant. These specimens were then reared under controlled laboratory conditions (25±2°C and 60±5% relative humidity) in containers containing sunflower leaves, and their development was monitored. The emerged adult Lepidoptera and parasitoids were subsequently identified. Taxonomic diagnoses revealed that the lepidopteran species was Plutella xylostella (Lepidoptera: Plutellidae), and its associated parasitoid was Diadromus subtilicornis (Hymenoptera: Ichneumonidae). Based on these findings, sunflower was recorded as a new host plant for P. xylostella. Furthermore, P. xylostella was documented as a new faunistic record for Tokat Province. Additional information is provided regarding the host range, geographic distribution in Turkey and globally, and known parasitoids of P. xylostella.

Keywords

• Diadromus subtilicornis
• parasitoid
• sunflower
• Tokat

Türkiye’den Plutella xylostella (L.) (Lepidoptera: Plutellidae) için yeni bir konukçu bitki kaydı

Öz

Bu çalışma, tarımsal üretimde önemli bir yere sahip olan ayçiçeği [Helianthus annuus L. (Asteraceae)] bitkisi üzerinde bulunan zararlı Lepidoptera türlerinin ve bunlara ait doğal düşmanların belirlenmesi amacıyla Tokat ilinde 2023 yılı yetiştirme sezonu boyunca yürütülmüştür. Arazi çalışmaları kapsamında, ayçiçeği tarlalarından bitkinin farklı dönemlerinden ergin öncesi dönemleri toplanmış ve 25±2°C sıcaklık ve %60±5 nem koşullarında içerisinde ayçiçeği yaprakları bulunan kaplar içerisinde laboratuvarda kültüre alınarak gelişimleri izlenmiştir. Elde edilen ergin lepidopter ve parazitoitlerin teşhisleri gerçekleştirilmiştir. Yapılan teşhis işlemleri sonucunda lepidopter erginlerinin Plutella xylostella (Lepidoptera: Plutellidae) ve parazitoitin ise Diadromus subtilicornis (Hymenoptera: Ichneumonidae) olduğu anlaşılmıştır. Bulgular doğrultusunda, ayçiçeği bitkisinin P. xylostella için yeni bir konukçu kaydı olduğu belirlenmiştir. Yine P. xylostella’nın Tokat böcek faunası için yeni kayıt olduğu tespit edilmiştir. Plutella xylostella ve parazitoit D. subtilicornis’in konukçuları, Türkiye ve dünyadaki yayılışları ile P. xylostella’nın parazitoitleri hakkında bilgiler verilmiştir.

Anahtar Kelimeler

• Diadromus subtilicornis
• parazitoit
• ayçiçeği
• Tokat

Kaynakça

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