Kırmızı duvarcı arısının Ankara ve Çankırı (Türkiye) illerinin meyve bahçelerindeki durumu

Özellikle sert çekirdekli meyvelerin önemli bir polinatörü olan Kırmızı duvarcı arısı, Osmia bicornis (L., 1758) (Hymenoptera: Megachilidae) ile ilgili araştırmalar, Türkiye’de son on yıl ile sınırlıdır. Afyonkarahisar’daki kiraz bahçelerinde ilk çalişmanın ardından 2014 ile 2016 yılları arasında Ankara ve Çankırı illerindeki karışık meyve bahçelerinde yürütülen bu çalışma, Kırmızı duvarcı arısının varlığını ve yoğunluğunu belirlemek ile yuvalanma biyolojisi hakkında veri elde etmeyi amaçlamıştır. Kırmızı duvarcı arısı, Malaise tuzak kullanılarak örneklenen hemen tüm bahçelerde belirlenmiş olmasına rağmen, yapay yuvalanma 2014 ve 2015 yıllarında sadece dört bahçede kaydedilmiştir. İç çapı 6-9 mm, uzunluğu 15-25 cm olan kamışlar yapay tuzak yuva olarak kullanılmışlardır. Yuvalanma başarısının %6 ile 48 arasında değiştiği belirlenmiştir. Yuvalardan elde edilen kokonlar diapozu başlatması için inkübatöre yerleştirilmiştir. Daha sonra inkübatörün sıcaklığı, erken ilkbaharda sert çekirdekli meyvelerin tomurcuk kabarması döneminin başlaması ile türün yaşam döngüsünü tamamlaması için kademeli olarak arttırılmıştır. Sonuç olarak, 2014 yılında toplanan 135 kokondan ergin çıkışı oranı %36 ile 95 olmuştur. 2015 yılına ait yuvaların diseksiyonundan elde edilen 143 kokonun hiç birinde ergin çıkışı kaydedilmemiştir. Eşey oranları hem tüm bahçeler arasında hem de aynı bahçenin 2014 ve 2105 yıllarında 1:1.5 ile 1:4 (♀:♂) arasında çeşitlilik göstermiştir. Sonuçlar, iklim, sınırlı polen ve nektar kaynakları ile insektisit uygulaması gibi stres koşullarına dayandırılarak tartışılmıştır.

Anahtar Kelimeler:

Malaise tuzak, Megachilidae, Osmia bicornis, eşey oranı, tuzak yuva

The status of the red mason bee in the orchards of Ankara and Çankırı Provinces, Turkey

Research on the red mason bee, Osmia bicornis (L., 1758) (Hymenoptera: Megachilidae), which is an important pollinator particularly for stone fruits, in Turkey is limited to the last decade. After the first report in sweet cherry orchards of Afyonkarahisar, this study aimed to determine the presence and the density of the red mason bee and to collect data on its nesting biology between 2014 and 2016 in the mixed orchards of Ankara and Çankırı Provinces. Although the red mason bee was detected in almost all orchards sampled using the Malaise trap, the nesting activity was recorded in only four orchards in 2014 and 2015. Reeds with an inner diameter of 6-9 mm and a length of 15-25 cm were used as the artificial trap-nests. It was determined that the percentage of the nesting success varies between 6 and 48%. The cocoons that originated from the nests were placed in the incubator to stimulate diapause. Then, the temperature of the incubator was gradually increased to complete the life cycle of the species with starting the bud stage of stone fruits in early spring. Consequently, the emergence rates of the adults from the 135 cocoons collected in 2014 were 36 to 95%. It was not recorded the adult emergence from any of the 143 cocoons obtained from the dissections of the nests in 2015. The sex ratios, both between orchards and from 2014 to 2015 in the same orchard ranged between 1:1.5-1:4 (♀:♂). The results are discussed based on stress conditions such as weather, limited pollen and nectar sources and insecticide application.

Keywords:

Malaise trap, Megachilidae, Osmia bicornis, sex ratio, trap nest,

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