Mitotic Karyotype of Spalangia endius Walker(Hymenoptera: Pteromalidae), A Pupal Parasitoid of Tephritid Flies(Diptera: Tephritidae) in Thailand.

A technique using 50 kR gamma irradiation on 2-day-old Musca domestica L. pupae was developed to allow for up to 8 weeks of storage at 4.4 ± 0.5°C and 70 ± 5% RH. These pupae can be used to supplement the daily production of M. domestica pupae for maintenance of the parasitoid colonies, augmentative releases of parasitoids and provide pupae for foreign exploration to obtain exotic parasitoids.

Download Full-text

Ability of Spalangia endius (Hymenoptera: Pteromalidae) to Parasitize Bactrocera dorsalis (Diptera: Tephritidae) after Switching Hosts

Insects ◽

10.3390/insects12070613 ◽

2021 ◽

Vol 12 (7) ◽

pp. 613

Author(s):

Yuan Zheng ◽

Zi-Wei Song ◽

Yu-Ping Zhang ◽

Dun-Song Li

Keyword(s):

Bactrocera Dorsalis ◽

Low Density ◽

Type Ii ◽

Emergence Time ◽

Functional Responses ◽

Parasitism Rate ◽

Spalangia Endius ◽

Pupal Parasite ◽

Density Population

We studied the parasitism capacity of Spalangia endius as a pupal parasite of Bactocera dorsalis after switching hosts. We used pupae of B. dorsalis and M. domestica as the hosts and studied parasitism by S. endius in the laboratory. The parasitism capacities were compared at different host densities and different parasitoid ages. The two functional responses of S. endius fitted a Holling Type II equation. More M. domestica were parasitized than B. dorsalis at all the densities. The ability of S. endius to control M. domestica was α/Th (parasitism capacity) = 32.1950, which was much stronger than that of control B. dorsalis, which was α/Th = 4.7380. The parasitism rate of wasps that had parasitized B. dorsalis had decreased by the emergence time of parasitoids. These results suggest that the parasitoid-pest ratio should be 1:25 to maintain a relatively stable parasitism rate for control of B. dorsalis. The S. endius colony reared on M. domestica successfully controlled a low-density population of B. dorsalis in the lab. We provide evidence suggesting that the parasitism capacity of S. endius needs to be improved.

Download Full-text

The Pupal Parasitoid Trichopria drosophilae Is Attracted to the Same Yeast Volatiles as Its Adult Host

Journal of Chemical Ecology ◽

10.1007/s10886-021-01295-6 ◽

2021 ◽

Author(s):

Gordana Đurović ◽

Francine A. C. Van Neerbos ◽

Sofie Bossaert ◽

Beatriz Herrera-Malaver ◽

Jan Steensels ◽

...

Keyword(s):

Pupal Parasitoid

Download Full-text

BIOLOGY OF TACHINAEPHAGUS ZEALANDICUS (HYMENOPTERA: ENCYRTIDAE), PARASITOID OF SYNANTHROPIC DIPTERA

The Canadian Entomologist ◽

10.4039/ent106785-8 ◽

1974 ◽

Vol 106 (8) ◽

pp. 785-800 ◽

Cited By ~ 23

Author(s):

G. S. Olton ◽

E. F. Legner

Keyword(s):

Life History ◽

Developmental Stages ◽

Average Length ◽

Host Density ◽

Adult Emergence ◽

Reproductive Period ◽

Laboratory Studies ◽

Pupal Parasitoid ◽

History Of ◽

Parasitoid Development

AbstractThe synonymy, distribution, host range, and life history of the gregarious larval–pupal parasitoid Tachinaephagus zealandicus Ashmead, is discussed. Laboratory studies of its biology were conducted at 25° ± 2 °C using Musca domestica L. as host. Its developmental stages are described. Under laboratory conditions its life cycle lasted 23–27 days. Parasitoid development accelerated with higher average densities per host. Single standardized hosts produced 3–18 adult parasitoids. Mated females provided with hosts lived 50.4–67.2 h. The average length of the reproductive period and number of hosts parasitized were independent of host density; however, the average number of eggs deposited per host increased at lower host densities. Adult emergence displayed circadian rhythmicity independent of photoperiod over 3+ days.

Download Full-text