Reproduction of Trichospilus diatraeae (Hymenoptera: Eulophidae) with Different Densities and Parasitism Periods in Anticarsia gemmatalis (Lepidoptera: Noctuidae) Pupae

Abstract

Mass production of the endoparasitoid Trichospilus diatraeae Cherian & Margabandhu (Hymenoptera: Eulophidae) should be studied to allow its use in the biological control of Lepidoptera pests. The objective of this study was to evaluate the reproduction of T. diatraeae with Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) pupae with different host densities and parasitism periods in the laboratory. The experiment had 12 24/48-hour old A. gemmatalis pupae per replication individualized and exposed

Thermal Requirements of Ooencyrtus submetallicus (Hym.: Encyrtidae) and Telenomus podisi (Hym.: Platygastridae) Parasitizing Euschistus heros Eggs (Hem.: Pentatomidae)

“…The emergence percentages observed for both species were considered adequate, because above 72% is ideal for laboratory rearing [ 25 ]. A high emergence percentage of parasitized eggs indicates that the host is satisfactory for the parasitoids to complete their development, which is an important outcome for biological control programs [ 26 ].…”

“…The longevity of parasitoids consists of their survival period and emergence death; when this characteristic is determined, considering field stress conditions such as temperature and food scarcity can provide information on the range of releases for regulating the target pest [ 25 ]. The parasitoids O. submetallicus and T. podisi survived longer when fed.…”

Reproduction of Ooencyrtus submetallicus (Hymenoptera: Encyrtidae) in egg densities of Euschistus heros (Hemiptera: Pentatomidae)

“…In the present study, the parasitoids in each treatment were maintained under the same constant physiological conditions of food, photoperiod, relative humidity, and temperature; therefore, longevity was not affected by the density of eggs to which they were exposed. Oliveira et al (2018) found that the parasitoid Trichospilus diatraeae (Margabandhu and Cherian) (Hymenoptera: Eulophidae) exhibited similar longevity between treatments when exposed to different pupae densities of Anticarsia gemmatalis (Hübner) (Lepidoptera: Erebidae). When the objective is mass production, the ability of natural enemies to survive is a factor of interest in efficient management in the field (Queiroz et al 2017).…”