บทคัดย่องานวิจัย

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Comparative heat of respiration of five grain beetles in stored wheat.

Cofie-Agblor, R.; Muir, W. E.; Sinha, R. N.;

Postharvest Biology and Technology Year: 1995 Vol: 5 Issue: 1-2 Pages: 167-175 Ref: 16 ref.

1995

บทคัดย่อ

Comparative heat of respiration of five grain beetles in stored wheat.

 

The heat production of 5 species of Coleoptera in wheat of 14.5% moisture content was measured at initial grain temperatures of 20 and 30 deg C in 10 h using a computer-controlled adiabatic calorimeter. Heat production per individual at both temperatures was greatest in Sitophilus granarius (66.1 and 81.4 micro W) and least in Rhyzopertha dominica (12.5 and 35.3 micro W). S. oryzae had the greatest heat production rate per unit biomass at 25.3 and 30.6 micro W/mg at 20 and 30 deg C, resp. Heat production by all species was higher at 30 deg C than at 20 deg C; the difference was greater for Tribolium castaneum, T. confusum and R. dominica than for S. granarius and S. oryzae. The rate of heat production by S. granarius at 30 deg C decreased with time, the average rate during the first 6 h was 93.7 micro W/insect, while during the final 2 h the rate was 58.7 micro W/insect. Heat production rates of S. granarius, S. oryzae and R. dominica increased with time at 20 deg C. For all species at both temp

eratures, the measured heat production was greater than the amount calculated from the respiratory exchange.