كليدواژه :
ANDRALLUS SPINIDENS , ANDRALLUS SPINIDENS سن شكارگر , mass rearing , پرورش انبوه , كشاورزي , Egg storage , انبارداري تخم
چكيده لاتين :
Mass rearing and egg storage of Andrallus spinidens under laboratory conditions were studied. In order to study the best average number of eggs laid and best percentage of egg hatchability, an experiment was conducted with different ratios; 3:1 and 2:1 in favor of males and 2:1 and 3:1 in favor of females, as well as 1:1.The insects were reared inside 5.6 litre containers under laboratory conditions (25±2°c, 75±5% RH, at a photoperiod of 16L: 8D). The design of the experiment was a completely randomized one with four replications. Results showed that sex ratio of 2:1 in favor of males with an average of 431.7 eggs had, significantly greater number of eggs than other ratioes, but egg hatching of this ratio with 87.7% did not show any significant difference with other treatments. In another experiment with 8 males and 4 females of Andrallus spinidens in each 11.71itre container, the total deposited egg and egg hatchability were 1134.3 and 85.16%, respectively. Storage of eggs at 4, 8, 12, 16 and 25°c for 2, 6, 10, 15, 20, 25 and 30 days and then transfering them into a growth chamber (25±2°c, 75±5% RH, at a photoperiod of 16L: 8D) showed that only in 2 days storage at 16°c, 15.8% of fifth instar nymphs developed to adult and embryonic period, in comparsion with control, was increased to 10 days. Other treatments had no significant effect on nymphal survival and embryonic period.
