Abstract
Abstract
The continuous utilisation of an alternative host may influence parasitoid performance across successive generations due to conditioning in natal hosts. Tetrastichus howardi (Olliff) has successfully been reared using Tenebrio molitor L. pupae as a feasible alternative host. However, the extended rearing of T. howardi on this alternative host may impact the biological features of the parasitoids. Parasitoids were reared using T. molitor pupae for 30 consecutive generations. Quality criteria were assessed during the generations F5, F15, and F30, offering pupae of the target pest, Diatraea saccharalis (Fabr.), and compared with the F0 generation (parasitoids reared in D. saccharalis pupae). Criteria included assessments of parasitism performance, host selection, and wing form variation in the parasitoid wasps. Additionally, we examined the fecundity of T. howardi females that emerged from both hosts, considering their age, egg loading before and after one oviposition, as well as parasitism of sugarcane stalk borer pupae. Rearing T. howardi using pupae of T. molitor did not affect its biological traits or preference for the target pest for 30 generations. After parasitism, the parasitoid left the host pupa inside the stalk, and one oviposition was enough to kill D. saccharalis pupae and obtain viable parasitoid progeny. Female sexual maturation and egg loading occurred 72 and 96 h after parasitoid emergence. Egg-loading recovery after parasitism did not happen within 24 h. T. howardi can be reared for up to 30 generations using alternative hosts without compromising its parasitism performance or egg loading.
Publisher
Cambridge University Press (CUP)
Reference70 articles.
1. Vargas, EL (2013) Parasitismo e desenvolvimento de Tetrastichus howardi (Hymenoptera: Eulophidae) em lagarta e pupa de Diatraea saccharalis (Lepidoptera: crambidae) (Tese de doutorado). Universidade Federal da Grande Dourados, Dourados, MS.
2. Influence of natal host and oviposition experience on sex allocation in a solitary egg parasitoid, Anastatus disparis (Hymenoptera, Eupelmidae);Liu;Journal of Hymenopteran Research,2017
3. Effect of host switching simulation on the fitness of the gregarious parasitoid Anaphes flavipes from a novel two-generation approach;Samková;Scientific Reports,2021
4. On lines and planes of closest fit to systems of points in space;Pearson;The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science,1901
5. Artificial diet development for entomophagous arthropods