The effect on the longevity of Leptocybe invasa Fisher & LaSalle (Hymenoptera: Eulophidae) studied by microcalorimetry and traditional methods.

The longevity of Leptocybe invasa Fisher & LaSalle ( L. invasa) was studied by microcalorimetry and traditional methods, respectively. As regards the results from microcalorimetry, the heat flow in the process of metabolism of L. invasa declined exponentially. With the temperature increasing, the metabolism of L. invasa was inhibited, and the longevity of L. invasa decreased gradually. At 25 °C, the longevity of L. invasa almost reaches 360 h. At 41 °C, L. invasa will die within 18 h. The same phenomenon was observed under the low temperature. The supercooling point can be determined by microcalorimetry because the heat will be released due to the phase change. The survival aspects of L. invasa on high- and low-temperature exposures were also studied by traditional methods. Similar results were obtained in both methods, which indicated that microcalorimetry can be used to measure the metabolism of insect. [ABSTRACT FROM AUTHOR]