Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Irradiation of Planococcus citri (Risso) (Homoptera: Pseudococcidae) with gamma radiation from cobalt-60 to determine the disinfestation dose.

Abstract

Adults of Planococcus citri were irradiated with gamma radiation to test the effects of different doses on reproduction. Sixty adults up to 2 weeks old were irradiated with doses of: 0 (control), 10, 20, 30, 40, 80, 160, 200, and 240 Gy, at a dose rate of 3025 Gy/h. After irradiation, insects (15/treatment) were maintained on fruits of chayote (Sechium edule), at 24-27°C and 65-75% RH. After 50 days, there were 2087.25 ± 301.34 individuals for the control, and 1348.25 ± 349.77, 288.25 ± 129.62, and 54.25 ± 61.98 individuals for doses of 10, 20 and 30 Gy, resp. Insects treated with 40 Gy or higher produced no offspring.