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Interspecific extrinsic and intrinsic competitive interactions in egg parasitoids
The purpose of this work was to review both extrinsic and intrinsic competition between egg parasitoid species, and stressed the need to elucidate the overall competitive interaction that parasitoids species may experience in the field in order to enhance biological control success. Expand
Differential gene expression between alate and dealate queens in the red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae).
Three different vitellogenin genes and two unique yellow g-like genes were identified that may be closely associated with the reproductive system and/or nutrient transport and may be involved in the programmed cell death of the flight muscles. Expand
Substrate influences mating success and transmission of courtship vibrations for the parasitoid Cotesia marginiventris
Mating success and transmission of courtship vibrations are suggested to be critical to mating success in C. marginiventris, and future efforts to mass rear this parasitoid and other insects should consider the potential influences of rearing substrates on mating. Expand
Influence of adult experience on host microhabitat location by the generalist parasitoid,Campoletis sonorensis (Hymenoptera: Ichneumonidae)
In a dual-choice situation, parasitoids did not show a preference for either of the two host plants but did prefer a host to a nonhost plant, and this innate plant preference was not changed by a single oviposition experience. Expand
Prothoracic gland inactivation in Heliothis virescens (F.) (Lepidoptera:Noctuidae) larvae parasitized by Cardiochiles nigriceps Viereck (Hymenoptera:Braconidae).
Host C. nigriceps polydnavirus plays a major role in the inactivation of pupally committed host prothoracic glands, while putative factors occurring in the host haemolymph do not seem to be of particular importance at that developmental stage. Expand
Sources of spores for the possible horizontal transmission of Thelohania solenopsae (Microspora: Thelohaniidae) in the red imported fire ants, Solenopsis invicta.
It is theorized that the pathogen may be horizontally transmitted within a colony by the removal and sharing of meconium of prepupating fourth instar larvae by adult workers and by the adult fecal droppings, and intercolonially by contamination of midden piles or brood raiding. Expand
Simple, Filter-based PCR Detection of Thelohania solenopsae (Microspora) in Fire Ants (Solenopsis invicta)
A rapid, filter-based PCR amplification method detecting a portion of the small-subunit ribosomal RNA gene was developed to facilitate field studies detecting the parasite in fire ants, and compared favorably with traditional DNA extraction and PCR amplification methods. Expand
Plant-based food resources, trophic interactions among alien species, and the abundance of an invasive ant
The study shows that the distribution and abundance of different plant species could have important effects on the abundance of S. invicta through their effect on the ants’ food resources, and is consistent with the hypothesis that the emergence of novel trophic interactions among invasive species can promote the abundances of invasive ants. Expand
Regulation of host larval development by the egg-larval endoparasitoidChelonus insularis [Hym.: Braconidae]
In laboratory studies the effect of parasitism by the egg-larval endoparasitoidChelonus insularisCresson on the resulting larvae of 2 host species,Heliothis virescens (F.) andSpodopteraExpand
Territorial and mating behavior ofXylocopa fimbriata F. andXylocopa gualanensis Cockerell from Costa Rica
The territorial and mating behavior of two Xylocopaspecies X. fimbriataF. and X. gualanensisCockerell from Costa Rica are described. Male territorial activity was common during February through AprilExpand