Behavior of Trichogramma atopovirilia Oatman & Platner and T. pretiosum Riley (Hymenoptera: Trichogrammatidae) on Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) egg masses.
In this study we analyzed the impact of physical barriers of Spodoptera frugiperda (J. E. Smith) egg-masses on the behavior of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley. The duration of drumming, drilling, oviposition, period spent over the egg-mass, and interval between parasitized eggs were timed, and the number of parasitized eggs were recorded. The presence of scales on the egg-masses caused a significant increase in the time spent by both parasitoids on each process and a decrease in the residence time over the egg-mass and in the number of parasitized eggs, with an increase in the number of egg layers. There was a significant decrease in the number of parasitized eggs in relation to egg-masses with one layer and no scales. We observed that the physical barriers in fall armyworm egg-masses changed the behavior of T. atopovirilia and T. pretiosum, affecting their parasitization capacity.
Beserra
E B
EB
Departamento de Farfácia e Biologia, Universidade Estadual da Paraiba, C.P. 781/791, CEP 58100-000, Campina Grande, PB, Brazil.
Dias
C T
CT
Parra
J R P
JR
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D005260:Female; D006790:Host-Parasite Interactions / Q000502:physiology*; D006927:Hymenoptera / Q000502:physiology*; D007915:Lepidoptera / Q000254:growth & development / Q000502:physiology*; D010058:Oviposition; D010063:Ovum / Q000469:parasitology*