Resilience of the date stone beetle, Coccotrypes dactyliperda Fabricius, 1801 (Coleoptera: Curculionidae), following periods of exposure to subzero temperature

Year 2019, , 377 - 383, 01.12.2019

Dirk H. R. Spennemann

https://doi.org/10.16970/entoted.530263

Cited By: 3

Abstract

The date stone beetle, Coccotrypes dactyliperda Fabricius, 1801 (Coleoptera: Curculionidae), is a cold-sensitive agricultural pest that goes into hibernation inside infested seeds, ready to breed as temperature increases. To assess their resilience following exposure to cold, specimens reared from infested Phoenix canariensis Chabaud seeds were exposed prolonged subzero temperature in a laboratory setting at Charles Sturt University (Albury, Australia) in 2018. Specimens which had been allowed to tunnel into P. canariensis seeds as well as those held in vials were exposed to -8ºC for durations between 5 min and 7 h. Unprotected beetles survived a 75-min exposure to -8ºC, but the beetles in their brood galleries inside the seeds survived for over 7 h.

Keywords

Biogeography, climatic extremes, insect pests, physiology

Supporting Institution

This study was supported by the Institute for Land, Water and Society, Charles Sturt University.

Hurma böceği, Coccotrypes dactyliperda Fabricius, 1801 (Coleoptera: Curculionidae)’nın sıfır altındaki sıcaklıklara esnekliği

Abstract

Hurma böceği, Coccotrypes dactyliperda Fabricius, 1801 (Coleoptera: Curculionidae), sıcaklık arttıkça üremeye hazır hale gelen ve bulaşık tohumların içinde kışı geçiren soğuğa duyarlı tarımsal zararlıdır. Soğuğa karşı dayanıklılıklarını değerlendirmek için, bulaşık Phoenix canariensis Chabaud tohumlarından elde edilen örnekler, 2018 yılında Charles Sturt Üniversitesi (Albury, Avustralya)’ndeki bir laboratuvar ortamında uzun süreli sıfırın altındaki sıcaklıklara maruz bırakılmıştır. Phoenix canariensis tohumlarının içinde galeri açmalarına izin verilen örnekler ve şişelerde tutulan örnekler 5 ila420 dakika arasında -8ºC'ye maruz bırakıldı. Korunmasız böcekler -8ºC'ye 75 dakika hayatta kalabilirken, tohumların içindeki gizlendikleri galerilerindeki böcekler 7 saatten fazla yaşamışlardır.

Keywords

Biyocoğrafya, iklim aşırı uçlar, zararlı böcekler, fizyoloji

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