Low temperature shock and chill-coma consequences for the red flour beetle (Tribolium castaneum) and the rice weevil (Sitophilus oryzae)

2020 ◽  
Vol 94 ◽  
pp. 102774
Author(s):  
Marwa M. Ramadan ◽  
Amira A.A. Abdel-Hady ◽  
Raul Narciso C. Guedes ◽  
Ahmed S. Hashem
Keyword(s):  
Low Temperature ◽  
Tribolium Castaneum ◽  
Sitophilus Oryzae ◽  
Red Flour Beetle ◽  
Rice Weevil ◽  
Temperature Shock ◽  
Flour Beetle ◽  
Chill Coma

Cold Tolerance of the Tribolium castaneum (Coleoptera: Tenebrionidae), Under Different Thermal Regimes: Impact of Cold Acclimation

2019 ◽  
Vol 112 (4) ◽  
pp. 1983-1988 ◽  
Author(s):  
H Izadi ◽  
M Mohammadzadeh ◽  
M Mehrabian
Keyword(s):  
Cold Acclimation ◽  
Cold Tolerance ◽  
Tribolium Castaneum ◽  
Cold Hardiness ◽  
Red Flour Beetle ◽  
Flour Beetle ◽  
Chill Coma ◽  
Rapid Cold Hardening ◽  
Thermal Regimes ◽  
Coleoptera Tenebrionidae

Abstract The red flour beetle, Tribolium castaneum (Herbst), is a serious pest of stored product worldwide. Cold tolerance or cold hardiness is an important ecophysiological trait related directly to survival, fitness, and distribution of insects. In this study, the effects of four thermal regimes, i.e., control (C), cold acclimation (CA), rapid cold hardening (RCH), and fluctuating-acclimation (FA), were examined for their effects on cold tolerance, supercooling point (SCP), lower lethal temperature (LLT), and chill-coma recovery time (CCRT) of the red flour beetle. In addition, changes in cryoprotectant (trehalose, sorbitol, and myo-inositol) levels were investigated under each thermal treatment. The results documented a substantial enhancement in the SCP, cold hardiness, and cryoprotectant levels of the adults of T. castaneum under CA regimes. The lowest SCP, highest trehalose and myo-inositol contents, and, subsequently, the greatest survival rate were observed in cold-acclimated beetles. In addition, coordination between cryoprotectant level, SCP, and cold tolerance of the pest was observed. The highest and lowest CCRT were observed at control and CA, respectively. In RCH regime with the highest impact, LLT reached the lowest level of −22°C. As most of the mortality of T. castaneum occurred at a temperature above the SCP, so this pest could be considered as a chill-susceptible insect.

scholarly journals A temperature shock can lead to trans‐generational immune priming in the Red Flour Beetle, Tribolium castaneum

2015 ◽  
Vol 5 (6) ◽  
pp. 1318-1326 ◽  
Author(s):  
Hendrik Eggert ◽  
Maike F. Diddens‐de Buhr ◽  
Joachim Kurtz
Keyword(s):  
Tribolium Castaneum ◽  
Red Flour Beetle ◽  
Temperature Shock ◽  
Immune Priming ◽  
Flour Beetle
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