![]() Such methods are needed because all major species of stored product insects have developed varying degrees of resistance to the limited number of insecticides which are internationally accepted for use on grain (Champ and Dyte, 1976, Taylor, 1989). Germination tests indicate that it is possible to choose a combination of inlet temperatures and exposure periods which effectively kills mites and insects in small grains, without harming the functional properties of the grain.Įconomy of the method was considered to be competitive with fumigation using phosphine.įor many years chemical control measures have dominated the methods for pest control in grain, but recently more interest has been directed towards non-chemical methods. ![]() The reduction in grain moisture content was 0.5–1% at treatments giving 100% control. truncatus in maize, an inlet temperature of 700☌ resulted in a complete disinfestation when the exposure time was 19 s. ![]() granarius with an inlet temperature of 300–350☌ and an average exposure period of 40 s. More than 99% mortality was obtained for all stages of S. granarius in wheat was obtained with an inlet temperature of 300–350☌ and an average residence time in the drum of 6 s. The capacity of the toaster was 1000 kg per hour.Ĭomplete control of grain mites and adult S. A rotating drum, connected to a natural-gas burner was fed with grain which was in constant movement along the drum and thereby mixed thoroughly during the process. Inlet temperatures of the hot air were in the range of 150–750☌ decreasing to outlet temperatures in the range of 100–300☌ during the exposure period. Wheat infested with grain mites (Acari) and Sitophilus granarius, and maize infested with Prostephanus truncatus, were exposed to hot air in a CIMBRIA HTST Microline toaster ®. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |