Storage studies of different stages of Anthocoris minki Dohrn (Hemiptera: Anthocoridae) under low temperatures

Abstract

The goal of this study was to evaluate the biological parameters of the predator Anthocoris minki Dohrn (Hemiptera: Anthocoridae) over various periods of growth at low temperatures. Storage studies were conducted for the following three stages: 1) 1-3 stage nymphs, 2) 4-5 stage nymphs, and 3) adult stages. All stages of the predator were stored at 7, 11, and 15 ± 1°C for 10, 20, 30, and 40 days under continuous scotophase. During storage, food eggs of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) were added once a week. Following storage, the predator was transferred to long day periods (16:8 [L:D] h, 25 ±1 ^oC). A lower survival rate (7.33%) was determined for the 1-3 nymph stage following storage at 7°C for 40 days. The highest survival percentage (90.0-92.0%) was determined for 1-3 stage nymphs and adult stage stored at 11°C for 10-30 days. The largest quantity of eggs was obtained when A. minki was stored at 11°C. Overall, our results indicated that A. minki can be stored for up to 40 days at 11°C.

Keywords

• Anthocoris minki, biological control, low temperature, mass rearing, storage

Düşük sıcaklıklarda Anthocoris minki Dohrn (Hemiptera: Anthocoridae)’nin farklı dönemlerinin depolanması

Öz

Bu çalışma ile farklı düşük sıcaklıkların ve farklı sürelerin predatör Anthocoris minki Dohrn (Hemiptera: Anthocoridae)’nin biyolojik özelliklerinin belirlenmesi amaçlanmıştır. Denemelerde A. minki’nin 1-3. nimf, 4-5. nimf ve ergin dönemleri kullanılmıştır. Her gruptaki bireyler 7, 11 ve 15±1°C sıcaklıklarda ve 10, 20, 30 ile 40 gün sürekli karanlıkta tutulmuştur. Düşük sıcaklıkta depolanan predatörlere haftada bir besin olarak Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) yumurtaları sunulmuştur. Depolama sonrası canlı kalan A. minki bireyleri uzun gün koşullarında (16:8 [A:K] h, 25±1°C) yetiştirilmeye alınmıştır. Depolama süresince en düşük canlı kalma oranı (%7.33), 7°C’de 1-3. nimf döneminde 40 gün depolandığında, en yüksek canlı kalma oranı (%90.0-92.0) ise 11°C’de 1-3. dönem nimf ve ergin döneminde 10-30 gün depolandığında gerçekleşmiştir. Depolama sonrası yetiştirilen bireylerde en fazla yumurta 11°C’de depolandığında elde edilmiştir. Sonuç olarak, A. minki 11°C’de 40 güne kadar depolanabilir.

Anahtar Kelimeler

• Anthocoris minki, biyolojik mücadele, düşük sıcaklık, depolama, kitle üretim

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