Related Experiment Video
Updated: Feb 2, 2026

Enhanced Oil Recovery using a Combination of Biosurfactants
Published on: June 3, 2022
Trichospilus diatraeae (Hymenoptera: Eulophidae): development and reproduction in Lepidoptera palm oil pests
R C Ribeiro1, T G Pikart2, H A Fouad3
1Faculdade de Agronomia, Universidade Federal do Pará - UFPA, Campus Universitário do Tocantins-Cametá, CEP 68400-000, Cametá, PA, Brasil.
Abstract:
Brazil is a leading palm oil producer, but the defoliating caterpillars Opsiphanes invirae Hübner Brassolis sophorae L. (Lepidoptera: Nymphalidae) can reduce the productivity of this crop. The aim of this study was to evaluate the development and reproduction of the parasitoid Trichospilus diatraeae Cherian & Margabandhu (Hymenoptera: Eulophidae) in pupae of these oil palm defoliators. Ten O. invirae or B. sophorae pupae with up to two days old were exposed each to 30 T. diatraeae females for 48 hours. Parasitism and emergence of the progeny of T. diatraeae were similar in pupae of both Lepidoptera defoliators. The life cycle of this parasitoid was shorter in O. invirae (21.50 ± 0.42 days) pupae than with those of B. sophorae (27.60 ± 1.80 days). The number of the progeny (669.00 ± 89.62) and dead immature (217.13 ± 58.18) of T. diatraeae were higher in B. sophorae pupae than in those of O. invirae with 447.83 ± 51.52 and 13.50 ± 5.23, respectively. The sex ratio and female and male longevity of T. diatraeae emerged from these hosts were similar. The reproductive traits, especially the number of individuals (offspring) of T. diatraeae were better with B. sophorae pupae than with those of O. invirae.
Related Concept Videos
Reproductive Cloning
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic...
Sustainable Development
Asexual Reproduction
Overview of the Reproductive System
The gonads, or primary reproductive organs, produce gametes and sex hormones. In males, the testes produce spermatozoa and testosterone, which is responsible for developing secondary male sex characteristics, including a deeper voice, larger muscles, facial and body...
Disorders of the Female Reproductive System
Disorders of the Male Reproductive System
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra....

