Abstract
The immature stages of the phytoseiid mite Amblyseius barkeri HUGHEs are described and illustrated. Incubation period averaged 2.0 +/- 0.75 days while female and male total immature stages lasted 8.43 +/- 0.8 and 6.86 +/- 1.07 days, during which they consumed 9.4 +/- 2.3 and 8.43 +/- 0.97 Tetranychus urticae KOCH nymphs, respectively. The female and male life span averaged 34.70 +/- 2.0 and 24.8 +/- 1.6 days, during which the predator consumed 161.43 +/- 13.16 and 106.8 +/- 16.42 prey individuals, respectively. During oviposition period, average female attacked 52.92% of the total prey individuals consumed during its longevity, and laid 13.20 +/- 0.86 eggs with a daily rate of 1.02 +/- 0.26 eggs.