scholarly journals Immediate and Delayed Mortality of <em>Tribolium confusum</em> Adults and Larvae on Concrete Surfaces Treated with Chlorantraniliprole

2021 ◽  
Author(s):  
Maria C. Boukouvala ◽  
Nickolas G. Kavallieratos ◽  
Erifili P. Nika
Keyword(s):  
Tribolium Confusum ◽  
Delayed Mortality

The Effect of Neutron Irradiation on the Fertility of Tribolium confusum

1961 ◽  
Vol 95 (881) ◽  
pp. 124-126
Author(s):  
Daniel J. McDonald ◽  
Howard C. Long
Keyword(s):  
Neutron Irradiation ◽  
Tribolium Confusum

Delayed mortality of males in Thylamys bruchi, a semelparous marsupial from the Monte Desert, Argentina

2020 ◽  
Author(s):  
M Soledad Albanese ◽  
Ricardo A Ojeda ◽  
Andrea A Astié
Keyword(s):  
Reproductive Strategy ◽  
Life History Strategy ◽  
Climatic Conditions ◽  
South American Species ◽  
Monte Desert ◽  
Nest Boxes ◽  
Energetic Balance ◽  
Delayed Mortality ◽  
Favorable Period ◽  
Capture Techniques

Abstract Male-only obligate semelparity is a well-studied reproductive strategy in some Australian marsupials. This strategy has not been documented in South American species, although semelparity in both sexes occurs in some Neotropical didelphids. The fat-tailed mouse opossum, Thylamys bruchi, is an endemic species of the temperate Monte Desert, in Argentina. Seasonality and predictability of resources are two of the attributes associated with habitats where marsupial semelparity has evolved, and both are characteristic of the Monte Desert. We aimed to characterize the life-history strategy of T. bruchi to explore if it can be considered a semelparous species. We studied a fat-tailed mouse opossum population for 7 years with two different capture techniques (Sherman traps and nest boxes). Thylamys bruchi showed strong seasonality in abundance, with the highest captures during summer and autumn. Reproduction and weaning coincided with the most favorable period of the year with respect to climate and resource availability. Every year we observed a single cohort with little overlap until weaning of young. After breeding, all adults disappeared from the population; however, unlike any other didelphids, males showed delayed mortality and died, along with females, after weaning. We found no evidence of survival to a second breeding season for either sex. We therefore propose T. bruchi as a desert-dwelling marsupial with a semelparous reproductive strategy. Because the severity of winters may be acting as an important constraint on the energetic balance of adults in this population, we propose that challenging climatic conditions, coupled with the seasonality and high predictability of food resources, may have contributed to the evolution of the extreme reproductive strategy in this didelphid marsupial.

scholarly journals Behavioral and Antennal Responses of Tribolium confusum to Varronia globosa Essential Oil and Its Main Constituents: Perspective for Their Use as Repellent

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4393
Author(s):  
Cesar Auguste Badji ◽  
Jean Dorland ◽  
Lynda Kheloul ◽  
Dimitri Bréard ◽  
Pascal Richomme ◽  
...  
Keyword(s):  
Essential Oil ◽  
Tribolium Confusum ◽  
High Dose ◽  
Synthetic Chemicals ◽  
Stored Product Pest ◽  
Indigenous Plant ◽  
Main Components ◽  
Electroantennogram Recordings ◽  
The Individual ◽  
Main Component

Essential oils of aromatic plants represent an alternative to classical pest control with synthetic chemicals. They are especially promising for the alternative control of stored product pest insects. Here, we tested behavioral and electrophysiological responses of the stored product pest Tribolium confusum, to the essential oil of a Brazilian indigenous plant, Varronia globosa, collected in the Caatinga ecosystem. We analyzed the essential oil by GC-MS, tested the effects of the entire oil and its major components on the behavior of individual beetles in a four-way olfactometer, and investigated responses to these stimuli in electroantennogram recordings (EAG). We could identify 25 constituents in the essential oil of V. globosa, with anethole, caryophyllene and spathulenole as main components. The oil and its main component anethole had repellent effects already at low doses, whereas caryophyllene had only a repellent effect at a high dose. In addition, the essential oil abolished the attractive effect of the T. confusum aggregation pheromone. EAG recordings revealed dose-dependent responses to the individual components and increasing responses to the blend and even more to the entire oil. Our study reveals the potential of anethole and the essential oil of V. globosa in the management of stored product pests.

Beyond average: an experimental test of temperature variability on the population dynamics of Tribolium confusum

2010 ◽  
Vol 53 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Sergio A. Estay ◽  
Sabrina Clavijo-Baquet ◽  
Mauricio Lima ◽  
Francisco Bozinovic
Keyword(s):  
Population Dynamics ◽  
Experimental Test ◽  
Temperature Variability ◽  
Tribolium Confusum
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