Amblyseius herbicolus

Xin, Tian-Rong & Zhang, Zhi-Qiang, 2021, Suitability of pollen as an alternative food source for different developmental stages of Amblyseius herbicolus (Chant) (Acari: Phytoseiidae) to facilitate predation on whitefly eggs, Acarologia 61 (4), pp. 790-801 : 795-796

Development and reproduction of A. herbicolus fed on Typha orientalis pollen or T. vaporariorum egg

Although there were no statistically significant differences in the developmental durations of egg and larvae of A. herbicolus within the four groups (P>0.05), the developmental times of the protonymph and deutonymph stages of A. herbicolus revealed obvious differences ( Table 2). The longest developmental durations for A. herbicolus protonymphs and deutonymphs were observed in groups T2 and T4, respectively. The developmental time of A. herbicolus protonymphs in group T2 was 1.15, 1.11, and 1.03 times those in groups T1, T3 and T4, respectively. Similarly, the developmental time of A. herbicolus deutonymphs in group T4 was 1.09, 1.18, and 1.20 times those in groups T1, T2, and T3, respectively. Taken together, all the eggs succeeded in reaching adulthood, but the duration of egg to adult developmental time of A. herbicolus was obviously different among the four treatment groups. The longest and shortest on Trialeurodes vaporariorum egg and cattail pollen ( Typha orientalis ) (25±1 °C, 60 ±10% RH and

12:12 h (L:D) photoperiod).

developmental times of egg to adult were obtained in groups T4 and T3, respectively (Table

2). Although no significant differences were observed between groups T1 and T2, there were statistically significant differences among groups T1 (or T2), T3, and T4.

The oviposition rates of A. herbicolus adult females at day 1 were highest in group T2, which was 1.54, 1.54, and 2.15 times those in groups T1, T3, and T4, respectively (Table

3). However, there were no significant differences among groups T1, T3, and T4 (P <0.05). A. herbicolus adult females in groups T2 and T3 at day 2 revealed the highest oviposition rates, which were 1.09 and 1.52 times those in groups T1 and T4, respectively; however, no significant differences in oviposition rates of A. herbicolus were found among groups T1, T2, and T3. Last, A. herbicolus adult females in group T2 within two days revealed the highest average oviposition rates, which were 1.32, 1.26, and 1.81 times those in groups T1, T3, and

T4, respectively. The average oviposition rate of A. herbicolus adult females in group T1 was not significantly different from that of group T3 (P <0.05) ( Table 3 ).