Klaewklad, A., & Suasa-ard, W. 2005 Biology of Anagyrus dactylopii (Howard) (Hymenoptera: Encyrtidae), as the important parasite of the spherical mealybug, Nipaecoccus viridis (Newstead) (Homoptera: Pseudococcidae).. Proceedings of 43rd Kasetsart University Annual Conference, Thailand, 1-4 February, 2005. Subject: Plants. Kasetsart University Bangkok

Notes: Anagyrus dactylopii (Hymenoptera: Encyrtidae) is an important parasite of the spherical mealybug Nipaecoccus viridis (Homoptera: Pseudococcidae) infesting citrus. A study on the biology of A. dactylopii revealed that the incubation period was 1.20+/-0.42 days. The larval stage consists of three instars. A pre-pupal stage was also present. The mean durations of the three instar larvae, pre-pupa, pupa, adult male and adult female were 1.65+/-0.49, 1.85+/-0.37, 2.20+/-0.41, 1.85+/-0.37, 4.75+/-0.44, 14.12+/-3.87 and 22.72+/-5.10 days, respectively. Development from egg to adults was approximately 9-16 days. An investigation on the efficiency of A. dactylopii for the parasitization of various stages of N. viridis revealed that the percent parasitization increased when the nymph stage of the mealybug augmented. Further study on the population of the parasite and its host in the field revealed the occurrence of the population of A. dactylopii depending on the population of the spherical mealybug. The highest parasitization was 54.30% in April 2003 and the mean parasitization all over the year at Amphoe U-Thong, Thailand was 33.72%.