scholarly journals Oxygen Consumption and Acoustic Activity of Adult Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae: Bruchinae) during Hermetic Storage

Insects ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. 45 ◽  
Author(s):  
Anastasia Njoroge ◽  
Richard Mankin ◽  
Bradley Smith ◽  
Dieudonne Baributsa
Keyword(s):  
Oxygen Consumption ◽  
Callosobruchus Maculatus ◽  
Hermetic Storage ◽  
Acoustic Activity

Hermetic storage as an alternative for controlling Callosobruchus maculatus (Coleoptera: Chrysomelidae) and preserving the quality of cowpeas

2018 ◽  
Vol 78 ◽  
pp. 27-31 ◽  
Author(s):  
Míria G.C. Silva ◽  
Gutierres N. Silva ◽  
Adalberto H. Sousa ◽  
Romenique S. Freitas ◽  
Maksaíla S.G. Silva ◽  
...  
Keyword(s):  
Callosobruchus Maculatus ◽  
Hermetic Storage

scholarly journals The Effect of Rosmarinus officinalis Essential Oil Fumigation on Biochemical, Behavioral, and Physiological Parameters of Callosobruchus maculatus

Insects ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 344
Author(s):  
Michał Krzyżowski ◽  
Bartosz Baran ◽  
Bartosz Łozowski ◽  
Jacek Francikowski
Keyword(s):  
Oxygen Consumption ◽  
Essential Oil ◽  
Callosobruchus Maculatus ◽  
Significant Inhibition ◽  
Rosmarinus Officinalis ◽  
Glutathione S Transferase ◽  
Cowpea Weevil ◽  
Low Concentrations ◽  
Insecticidal Action ◽  
Rosmarinus Officinalis L

This study explores the influence of rosemary, Rosmarinus officinalis (L.) essential oil (EO) on the biochemical (acetylcholinesterase, catalase, and glutathione S-transferase), physiological (oxygen consumption), and behavioral (open field test, repellency) parameters of an important stored product insect: cowpea weevil, Callosobruchus maculatus (F.). R. officinalis EO exhibited effective insecticidal action against C. maculatus even at relatively low concentrations. LC50 = 15.69 μL/L air, and was highly repellent at concentrations equal to or above LC25. Statistically significant inhibition in locomotor activity occurred only after the acute exposure to the EO at LC12.5 and LC25. The oxygen consumption test showed metabolism increase only at LC50. An increase in activity was observed in the case of all three enzymes examined. The presented data provides a potentially valuable resource in designing more environmentally friendly and safer insecticide agents.

scholarly journals Effects of Hypoxia on Acoustic Activity of Two Stored-Product Pests, Adult Emergence, and Grain Quality

2019 ◽  
Vol 112 (4) ◽  
pp. 1989-1996 ◽  
Author(s):  
Anastasia W Njoroge ◽  
Richard W Mankin ◽  
Bradley Smith ◽  
Dieudonne Baributsa
Keyword(s):  
Emerging Adults ◽  
Grain Quality ◽  
Callosobruchus Maculatus ◽  
Sitophilus Oryzae ◽  
Adult Emergence ◽  
Stored Grain ◽  
Acoustic Activity ◽  
Oxygen Levels ◽  
Post Exposure ◽  
Grain Damage

Abstract Modified atmospheres such as hermetic storage are widely used for the control of stored grain insect pests. To improve their effectiveness, there is need to better understand insect responses to low-oxygen environments. Adult Callosobruchus maculatus F. (Coleoptera: Chrysomelidae: Bruchinae) on cowpea and Sitophilus oryzae L. (Coleoptera: Curculionidae) on wheat were exposed to hypoxia treatments consisting of 1, 3, and 5% oxygen levels for 14 d. Acoustic activity was monitored during the experiment, and insect mortality and grain quality were examined immediately after the hypoxia treatments. Adult emergence was assessed 45 d post-treatment. All three hypoxia treatments eliminated acoustic activity of both species within 4 d. There was neither insect survival for both species nor significant grain damage immediately after 14-d exposure to hypoxia treatments. No adult insects emerged 45 d post-exposure on grains maintained at 1% oxygen level for 14 d. However, at 3 and 5% oxygen levels, there were eggs on cowpea, holes in wheat, and emerging adults for both insect species 45 d post-exposure. Although insect activity ceased within 4 d when hypoxia was maintained below 5%, there is need to explore exposure beyond 14 d for 3 and 5% oxygen levels, to ensure to avoid potential adult emergence from eggs and other insect life stages post-treatments. Maintaining 3–5% hypoxia conditions for a longer duration would ensure insufficient oxygen is available for progeny development.

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