ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Mortality of twospotted spider mite (Acari: Tetranychidae) after exposure to ethanol at elevated temperatures.

Dentener, P.R., Lewthwaite, S.E., Maindonald, J.H., and Connolly, P.G.

Journal of Economic Entomology. Volume 91, Number 3, June 1998. Pages 767-772.

1998

บทคัดย่อ

Mortality responses were determined for twospotted spider mite, Tetranychus urticae Koch, on apples to immersion in ethanol solutions at 20 degrees C (nondiapausing and diapausing mites), and 30, 40, and 45 degrees C (diapausing mites only). At 20 degrees C, nondiapausing T. urticae were more susceptible to ethanol immersion than the diapausing form. Increasing immersion times from 10 to 1,200 s significantly increased mite mortality for nondiapausing T. urticae but did not affect diapausing T. urticae. Increasing immersion temperatures for diapausing T. urticae from 20 to 40 degrees C did not change the ethanol concentration required to achieve 99% (LC99) mortality. Raising the immersion temperature from 40 to 45 degrees C only increased diapausing mite mortality at immersion times >800 s. Immersion of diapausing T. urticae for >600 s at 20 degrees C in 70% ethanol achieved 99% mortality and was more effective than immersion at 30-45 degrees C.