Parasitism by Campoletis flavicincta on Spodoptera frugiperda in corn

Abstract

-Parasitism by Campoletis flavicincta (Ashmead) (Hymenoptera: Ichneumonidae) on Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) and consequent reduction of production losses were evaluated on caged corn plants in the field. Treatments consisted of plots infested with 0 (control), 15 and 30 pairs of C. flavicincta with egg masses per cage and plot infested without cage and liberation of the parasitoid. Parasitoid release was done when S. frugiperda larvae were three-day-old. Fifty corn plants (40%) per plot were collected seven days after infestation and S. frugiperda larvae present were reared in glass cups on an artificial diet. Number of S. frugiperda larvae was reduced by C. flavicincta but mortality of the pest and parasitoid sex ratio in laboratory were similar among treatments. Total progeny and female production from collected larvae were similar among densities of released parasitoid. Parasitism rate was higher on 30 than on 15 pairs of C. flavicincta. Damage on corn plants at seven and 14 days after S. frugiperda infestation had similar grades at 0, 15 or 30 C. flavicincta pairs and higher values than the plots without cage. Damage by S. frugiperda was lower at 30 C. flavicincta pairs after 21 days of infestation. Final stand, stand reduction by plant death and corn productivity were similar among treatments.Index terms: field cage evaluation, corn pests, biological control, parasitoid density, Ichneumonidae. Parasitismo de

Trichospilus diatraeae (Hymenoptera: Eulophidae): development and reproduction in Lepidoptera palm oil pests

“…A similarly high sex ratio of T. diatraeae in the lepidopteran B. sophorae and O. invirae pupae agrees with that reported for the parasitoid Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) in Bombyx mori L. (Lepidoptera: Bombycidae) pupae (Pereira et al, 2009a). This may be an Eulophidae (Pereira et al, 2010) and Ichneumonidae (Matos Neto et al, 2004) characteristic, facilitating these parasitoids to increase their populations in the laboratory and field (Matos Neto et al, 2005;Amalin et al, 2005). Furthermore, it indicates a high potential reproductive capacity of T. diatraeae for integrated management of Lepidoptera oil palm defoliators.…”

Effects of Atrazine-Based Herbicide on Emergence and Sex Ratio of Trichogrammatidae (Hymenoptera)

“…In Brazil, Spodoptera species (Lepidoptera: Noctuidae) and weeds are the main pests of corn (Matos-Neto et al 2004). These insects commonly are controlled using chemical insecticides; however, these products can cause environmental contamination, thus leading to the search of alternative methods for the control of these pests (Céspedes et al 2004).…”

Biological Control of Fall Armyworm, Spodoptera frugiperda

“…In addition to C. insularis, many other parasitoid species are also observed in suppressing populations of FAW larvae [45]. Campoletis flavicincta has been extensively used to suppress the FAW population [46]. Insect predators consume both larvae and eggs that necessarily maintain the FAW population to a sub-economic level [47].…”