Disinfestation of Wheat Using Liquid Nitrogen Aeration

Authors: Haiyan. Li, Jitendra. Paliwal, Digvir S. Jayas, Noel D. G. White

Abstract:

A study was undertaken to investigate the effect of liquid nitrogen aeration on mortalities of adult Cryptolestes furrugineus, rusty grain beetles, in a prototype cardboard grain bin equipped with an aeration system. The grain bin was filled with Hard Red Spring wheat and liquid nitrogen was introduced from the bottom of the bin. The survival of both cold acclimated and unacclimated C. furrugineus was tested. The study reveals that cold acclimated insects had higher survival than unacclimated insects under similar cooling conditions. In most cases, mortalities of as high as 100% were achieved at the bottom 100 cm of the grain bin for unacclimated insects for most of the trials. Insect survival increased as the distance from the bottom of the grain bin increased. There was no adverse effect of liquid nitrogen aeration on wheat germination.

Keywords: Cold acclimated, liquid nitrogen aeration, mortalities, rusty grain beetles.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331731

References:

[1] Canada Grains Council statistical handbook, Canadian Grains Council, Winnipeg, MB, 2003.
[2] P.G. Fields, "The cold-hardiness of Cryptolestes ferrugineus and the use of ice nucleation-active bacteria as a cold-synergist," in Proc. 5th International Working Conf. on Stored-product Protection, Bordeaux, Gironde, 1990, pp. 9-14.
[3] P. G. Fields, "The control of stored-product insects and mites with extreme temperatures," Journal of Stored Products Research, vol. 28, no. 2, pp. 89-118, 1992.
[4] W. E. Muir and N. D. G. White, "Chemical control methods," in Grain Preservation Biosystems, W. E. Muir, Ed. Winnipeg, MB: University of Manitoba, 2001, pp. 354-371.