Seasonal Variation in Resistance to High Temperature of the Cadelle and the Confused Flour Beetle

1940 ◽  
Vol 43 ◽  
pp. 283 ◽  
Author(s):  
H. H. Walkden
Keyword(s):  
Seasonal Variation ◽  
High Temperature ◽  
Flour Beetle ◽  
Confused Flour Beetle

scholarly journals Rating knockdown of flour beetles after exposure to two insecticides as an indicator of mortality

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Christos G. Athanassiou ◽  
Nickolas G. Kavallieratos ◽  
Frank H. Arthur ◽  
Christos T. Nakas
Keyword(s):  
Tribolium Castaneum ◽  
Concrete Surface ◽  
Mortality Rates ◽  
Red Flour Beetle ◽  
Flour Beetle ◽  
Insecticidal Effect ◽  
Testing Period ◽  
Flour Beetles ◽  
Confused Flour Beetle ◽  
Contact Insecticides

AbstractKnockdown and mortality of adults of the red flour beetle, Tribolium castaneum (Herbst) and the confused flour beetle, Tribolium confusum Jacquelin du Val, were assessed after exposure to two contact insecticides, chlorfenapyr and cyfluthrin, on a concrete surface. Individuals were rated on a scale for knockdown of exposed adults according to their mobility from 1, representing immobilized adults to 5, representing normally moving (similar to the controls). Only cyfluthrin gave immediate knockdown. Adults were rated at 1, 3 and 7 days post-exposure. After the final assessment, adults were discarded and the same procedure was repeated for 5 consecutive weeks with new adults exposed on the same treated surfaces. Despite initial knockdown, many individuals did not eventually die after exposure to cyfluthrin. In contrast, adults exposed to chlorfenapyr were not initially knocked down after exposure but most died after 7 days. These trends were similar during the entire 5-week residual testing period. The storage of the treated dishes in illuminated or non-illuminated conditions did not affect the insecticidal effect of either insecticide. The results of the present study can be further implemented towards the design of a “lethality index” that can serve as a quick indicator of knockdown and mortality rates caused after exposure to insecticides.

scholarly journals Wood volatiles as attractants of the confused flour beetle, Tribolium confusum (Coleoptera: Tenebrionidae)

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Masatoshi Hori ◽  
Yoshimi Aoki ◽  
Kazutaka Shinoda ◽  
Mitsuo Chiba ◽  
Rikiya Sasaki
Keyword(s):  
Tribolium Confusum ◽  
Flour Beetle ◽  
Confused Flour Beetle ◽  
Coleoptera Tenebrionidae

scholarly journals Validation of hydrogen cyanide fumigation in flourmills to control the confused flour beetle

2016 ◽  
Vol 33 (No. 2) ◽  
pp. 174-179 ◽  
Author(s):  
R. Aulicky ◽  
V. Stejskal ◽  
M. Dlouhy ◽  
J. Liskova
Keyword(s):  
Hydrogen Cyanide ◽  
Flour Beetle ◽  
Confused Flour Beetle

Polyphenol Variation in Sitka Spruce

1975 ◽  
Vol 5 (1) ◽  
pp. 26-37 ◽  
Author(s):  
G. I. Forrest
Keyword(s):  
Seasonal Variation ◽  
High Temperature ◽  
Phenolic Content ◽  
Sitka Spruce ◽  
Main Stem ◽  
Temperature Regimes ◽  
Lower Temperature

The distribution of polyphenols in various tissues of Sitka spruce is described, with data on seasonal variation. Leaves were rich in a variety of flavonoids, but the main stem constituents were stilbenes. There was great variation both between and within provenances in most components, but evidence was obtained for differences in stilbene content attributable to provenance. Different temperature regimes caused marked differences in phenolic content, but clonal characteristics generally overrode treatment differences. High temperature favored polymeric polyphenol synthesis, while a lower temperature promoted high phenolic accumulations especially of monomeric components.

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