A Phase of Insect Respiration in Relation to the Toxicity of Contact Insecticides

1930 ◽  
Vol 23 (2) ◽  
pp. 383-383
Author(s):  
A. L. Strand
Keyword(s):  
Insect Respiration ◽  
Contact Insecticides

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.

The Fatty Acids as Contact Insecticides

1925 ◽  
Vol 18 (2) ◽  
pp. 292-299 ◽  
Author(s):  
E. H. Siegler ◽  
C. H. Popenoe
Keyword(s):  
Fatty Acids ◽  
Contact Insecticides

scholarly journals Mode of Entry of Contact Insecticides

Nature ◽  
1945 ◽  
Vol 156 (3952) ◽  
pp. 112-112 ◽  
Author(s):  
W. H. POTTS ◽  
F. L. VANDERPLANK
Keyword(s):  
Mode Of Entry ◽  
Contact Insecticides

The effects of cold pre-treatment on the toxicity of several contact insecticides on adults of three Sitophilus granarius (L.) populations

2014 ◽  
Vol 87 (2) ◽  
pp. 301-308 ◽  
Author(s):  
Petar Kljajić ◽  
Goran Andrić ◽  
Marijana Pražić-Golić ◽  
Dušanka Inđić ◽  
Slavica Vuković
Keyword(s):  
Sitophilus Granarius ◽  
Pre Treatment ◽  
Contact Insecticides

scholarly journals Toxicity of several contact insecticides to Tribolium castaneum (Herbst) populations after selection with pirimiphos-methyl and deltamethrin

2015 ◽  
Vol 30 (4) ◽  
pp. 209-216 ◽  
Author(s):  
Goran Andric ◽  
Marijana Prazic-Golic ◽  
Petar Kljajic
Keyword(s):  
Tribolium Castaneum ◽  
Topical Application ◽  
Selection Procedures ◽  
Insecticide Toxicity ◽  
Pirimiphos Methyl ◽  
Laboratory Bioassays ◽  
Contact Insecticides ◽  
Selection Of

Laboratory bioassays were conducted to detect possible alteration in susceptibility of two field Tribolium castaneum (Herbst) populations (sampled in a warehouse in Nikinci and a silo in Jakovo) to dichlorvos, malathion, chlorpyrifos-methyl, pirimiphos-methyl, deltamethrin and bifenthrin after previous selection with the LD80 of pirimiphos-methyl and deltamethrin. Data from the topical application bioassays show that chlorpyrifos-methyl was the most toxic insecticide to T. castaneum adults of the Nikinci population selected with pirimiphosmethyl and deltamethrin, while malathion was the weakest, and both selection procedures changed/reduced significantly only the toxicity of deltamethrin and bifenthrin, increasing their resistance ratios (RR) at the LD50 from 1.1 to 1.8 (bifenthrin) and from 0.9 to 2.2 (deltamethrin). Deltamethrin was the most toxic insecticide for Jakovo adults selected with the LD80 of pirimiphosmethyl, while malathion was again the least toxic. Selection of that population had no effect on insecticide toxicity, except of malathion, which had a rise in RR at the LD50 from 26.0 to 29.8.

Systemic Insecticides for the Control of Insects transmitting Swollen-shoot Virus Disease of Cacao in the Gold Coast

1955 ◽  
Vol 46 (3) ◽  
pp. 669-710 ◽  
Author(s):  
A. D. Hanna ◽  
E. Judenko ◽  
W. Heatherington
Keyword(s):  
Virus Disease ◽  
Gold Coast ◽  
Systemic Insecticides ◽  
Contact Insecticides

The swollen-shoot virus of cacao is transmitted in the Gold Coast by mealybugs, of which Pseudococcus njalensis Laing is the most important, and these are tended by ants of the genus Crematogaster, which build carton tents over the colonies, thus affording them protection against contact insecticides. An account is given of an investigation which was carried out at Tafo, Gold Coast, between 1950 and 1953, of the possibility of controlling mealybugs and thus the spread of the virus, by the use of systemic insecticides. Dimefox, schradan, paraoxon and parathion were tested, although the two last are not strictly systemic in action.

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