บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Mortality of Epiphyas postvittana (Lepidoptera: Tortricidae) after exposure to sodium bicarbonate at elevated temperatures or combined with emulsifiers.

Lewthwaite, S. E.; Dentener, P. R.; Connolly, P. G.;

New Zealand Journal of Crop and Horticultural Science Year: 1999 Vol: 27 Issue: 2 Pages: 83-90 Ref: 33 ref.

1999

บทคัดย่อ

Mortality of Epiphyas postvittana (Lepidoptera: Tortricidae) after exposure to sodium bicarbonate at elevated temperatures or combined with emulsifiers.

Mortality responses of fifth instar E. postvittana (lightbrown apple moth) larvae on apples (cv. Red Delicious) to immersion in solutions of: (1) 0.5-5% sodium bicarbonate at 20-45 deg C; and (2) 3% sodium bicarbonate combined with 0.05-0.5% concentrations of various emulsifiers at 20 deg C were determined. A 60-min immersion in 5% sodium bicarbonate at 20 deg C resulted in a maximum of 60% mortality. Up to 100% mortality was achieved by increasing the immersion temperature to 45 deg C. However, enhanced mortality was attributed to temperature rather than sodium bicarbonate. All of the emulsifiers added to 3% sodium bicarbonate increased mortality. Some emulsifiers provided moderate mortality on their own, but combination treatments were consistently better than either of the separate component treatments. The combination of 3% sodium bicarbonate and 0.05% sodium lauryl sulfate at 20 deg C resulted in more than or equal to 99% mortality and best demonstrated the increase in mortality resulting f

rom the addition of an emulsifier.