Item Details

Title: Oxygen demand of bean bruchids (Acanthoscelides obtectus Say)

Date Published: 2020
Author/s: Jeffrey Askey, Carl Bern, Thomas Brumm and Joel Coats
Data publication:
Funding Agency :
Copyright/patents/trade marks:
Journal Publisher: Journal of Stored Products and Postharvest Research
Affiliation: Department of Agricultural and Biosystems Engineering, Iowa State University, United States of America
Keywords: Beans, bean bruchids, hermetic storage, insects, oxygen demand, storage losses.


The common bean (Phaseolus vulgaris L) is an important crop in many countries and its safe storage is
crucial in maintaining a sufficient and high quality food supply for the community. A non-chemical
storage technique, hermetic storage, is being used to control the bean bruchid (Acanthoscelides
obtectus Say), a beetle which can cause large losses to stored beans. Experiments were carried out
using hermetically sealed containers of known gas volume at different temperatures (10 and 27°C) and
bean moistures (8 and 16% wet basis) to quantify the oxygen requirement of bruchids. Bruchids use
between 0.0074 and 0.1043 cm3
, depending on bean temperature and bean moisture
content. Days to 100% adult bruchid mortality in hermetic storage, as a function of infestation level,
storage volume, temperature and bean moisture content, can be estimated by using these oxygen
requirement results. These estimates can be used to design hermetic storage systems to protect beans
from damage by bruchids.