Susceptibility of Rhyzopertha dominica to high CO2 modified atmospheres in packaged chickpeas
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Iturralde-García, Rey D.
Wong-Corral, Francisco J.
Three MAs with 50%, 70% and 90% CO2 in air was tested at different exposure times on all the developmental stages of R. dominica using chickpeas packed with 4% and 96% filling ratio in which there was excess of CO2. At 4% filling ratio the loss of the gas was negligible. The exposure time to reach 50% mortality (LT50) was estimated for each developmental stage and CO2 concentration, ranging from 7 h for larvae with 90% to 2 days for pupae with 50% CO2. At 96% filling ratio and for the intervals of the estimated exposure times (LT50) from the 4% filling ratio, mortality decreased significantly for eggs and adults at the three MAs tested, while for the internal developmental stages, larvae at 50% and 70% CO2 and pupae in all concentrations of CO2, the susceptibility remained the same as with a 4% filling ratio. This decline in mortality of the external developmental stages was possible due to the sorption of CO2 by the chickpeas, which caused a loss of intergranular levels of CO2 between 17% and 29%. This sorption ranged from 0.1955 to 0.3285 g of CO2 per kg of chickpeas and produced a negative pressure of 77.12 to 60.65 kPa. In conclusion, when chickpeas are packed with high CO2 MAs, a decrease in the mortality of eggs and adults of R. dominica could be expected due to pulse sorption.
663/664 - Aliments i nutrició. Enologia. Olis. Greixos
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Journal of Stored Products Research
Iturralde-García, Rey D., Francisco J. Wong-Corral, Cristina Castañé, and Jordi Riudavets. 2020. "Susceptibility Of Rhyzopertha Dominica To High CO2 Modified Atmospheres In Packaged Chickpeas". Journal Of Stored Products Research 85: 101537. Elsevier BV. doi:10.1016/j.jspr.2019.101537.
Grant agreement number
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2014-00006-C02-01/ES/Plagas que afectan a la industria agroalimentaria: control biológico y detección de una especie invasiva/
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTI2018-095526-R-100/ES/Gestión integrada de plagas en el control biológico en grano almacenado/
Protecció Vegetal Sostenible
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