Impact of cigarette beetle Lasioderma serricorne (Fabricius) on grain storage and its control by Phosphine
1985
Tauthong, P. | Visarathanonth, P. (Kasetsart Univ., Bangkhen (Thailand))
Biological studies of the cigarette beetle, Lasioderma serricorne Fabricius were conducted in the laboratory on various kinds of grain and dried food. The food media were yard long bean, mungbean (var. U-Thong), ground soybean (var SJ1, SJ2, SJ3, and SJ5), blackseeded race, red kidney bean, Job's tears, field corn (var. Suwan), sweet corn, sorghum (var. KU 439), broken rice, curry powder, wheat flour, rice flour, glutinous rice flour, cassava starch, chili powder, garlic, and shrimp meal. The beetles fed well on most of the food media except rice flour, glutinous rice flour, cassava starch, red kidney bean, and sorghum (var. KU 439). These food media did not promote growth and development of the insect after three months of exposure. The three most favorable media for insect growth and development were wheat flour, ground soybean (SJ2), and shrimp meal. Garlic induced slow growth rates and very few progeny were obtained. Results on phosphine fumigation with Magtoxin at 27.9 degrees Celsius and 81.5% relative humidity indicated that the pupal stage was more tolerant to phosphine than the fourth instar larva and adult. Phosphine concentrations of 55-125 ppm in a 48-hour fumigation or 65-115 ppm in a 7-2 hour fumigation could achieve 100% mortality of the test insects. A shorter exposure period (such as 24 hours) did not give good results for complete control of the pupae, although phosphine concentration was as high as 120 ppm.
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