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Beltsville, MD, United States

Kula R.R.,Plant science Institute
Journal of Hymenoptera Research | Year: 2011

Two new species, Heterospilus belokobylskiji Kula, sp. n. and Heterospilus vincenti Kula, sp. n., from the Nearctic Region are described and dif erentiated from all other New World species of Doryctinae that exhibit brachyptery or aptery. They are the first brachypterous species of Heterospilus Haliday known in the New World and increase the total number of brachypterous species in the genus to four worldwide. Source

Henry T.J.,Plant science Institute
Proceedings of the Entomological Society of Washington | Year: 2010

Thirty-two species of Miridae are recorded for the first time from West Virginia. With an additional six species reported in the literature and two subsequent synonymies since the 1983 "Annotated List..." by Wheeler, Mason, and Henry, 283 species of Miridae are now known from the state. The new records include six species in the subfamily Bryocorinae, two in Cylapinae, two in Deraeocorinae, twelve in Mirinae, seven in Orthotylinae, and three in Phylinae. Locality information, specific dates, associated host data, and number of specimens and sex are given for each species. Names used in the previous 1983 list are updated. Source

Otalora-Luna F.,Venezuelan Institute for Scientific Research | Dickens J.C.,Plant science Institute
PLoS ONE | Year: 2011

Orientation of insects to host plants and conspecifics is the result of detection and integration of chemical and physical cues present in the environment. Sensory organs have evolved to be sensitive to important signals, providing neural input for higher order multimodal processing and behavioral output. Here we report experiments to determine decisions made by Colorado potato beetle (CPB), Leptinotarsa decemlineata, in response to isolated stimuli and multimodal combinations of signals on a locomotion compensator. Our results show that in complete darkness and in the absence of other stimuli, pheromonal stimulation increases attraction behavior of CPB as measured in oriented displacement and walking speed. However, orientation to the pheromone is abolished when presented with the alternative stimulation of a low intensity yellow light in a dark environment. The ability of the pheromone to stimulate these diurnal beetles in the dark in the absence of other stimuli is an unexpected but interesting observation. The predominance of the phototactic response over that to pheromone when low intensity lights were offered as choices seems to confirm the diurnal nature of the insect. The biological significance of the response to pheromone in the dark is unclear. The phototactic response will play a key role in elucidating multimodal stimulation in the host-finding process of CPB, and perhaps other insects. Such information might be exploited in the design of applications to attract and trap CPB for survey or control purposes and other insect pests using similar orientation mechanisms. Source

The Renodaeus group, a monophyletic assemblage of genera within the New World orthotyline tribe Ceratocapsini, comprising eight genera, including four new ones, is defined; and 48 species are treated, including 26 described as new and 12 transferred from Ceratocapsus Reuter as new combinations. Ceratocapsidea gen. n. is described to accommodate the new species C. bahamaensis sp. n., from the Bahamas; C. baranowskii sp. n., from Jamaica; C. dominicanensis sp. n., from the Dominican Republic; C. rileyi sp. n., from Texas; C. taeniola sp. n., from Jamaica; C. texensis sp. n., from Texas; C. transversa sp. n., from Mexico (Neuvo León); and C. variabilis sp. n., from Jamaica; and Ceratocapsus balli Knight, comb. n., C. complicatus Knight, comb. n., C. consimilis Reuter, comb. n., C. fusiformis Van Duzee, comb. n. (as the type species of the genus), C. nigropiceus Reuter, comb. n., and C. rufistigmus Blatchley, comb. n. [and a neotype designated], Ceratocapsus clavicornis Knight, syn. n. and C. divaricatus Knight, syn. n. are treated as junior synonyms of Ceratocapsus fusiformis Van Duzee. The genus Marininocoris Carvalho and the only included species M. myrmecoides Carvalho are redescribed. The genus Pilophoropsis Poppius is redescribed and revised, Renodaeus texanus Knight, comb. n. is transferred into it and the three new species P. bejeanae sp. n., from Sonora, Mexico; P. cunealis sp. n., from Oaxaca, Mexico; P. quercicola sp. n., from Arizona, USA, are described. Pilophoropsidea gen. n. is described to accommodate the 12 new species P. brailovskyi sp. n., from Federal District, Mexico; P. cuneata sp. n., from Chiapas, Mexico; P. dimidiata sp. n., from Durango, Mexico; P. fuscata sp. n., from Durango, Mexico and Arizona and New Mexico, USA; P. keltoni sp. n., from Durango, Mexico; P. maxima sp. n., from Durango, Mexico; P. pueblaensis sp. n., from Puebla, Mexico; P. schaffneri sp. n., from Neuvo León and San Luis Potosi, Mexico; P. serrata sp. n., from Michoacan, Mexico; P. touchetae sp. n., from Mexico (Puebla); P. truncata sp. n., from Mexico (Guerrero); P. tuberculata sp. n., from Mexico (Guerrero); and Ceratocapsus barberi Knight, comb. n., Ceratocapsus camelus Knight, comb. n. (as the type species of the genus), and Ceratocapsus fascipennis Knight, comb. n. Pilophoropsita gen. n. is described to accommodate P. schaffneri sp. n. from Costa Rica and Mexico (Jalisco, Nayarit, Oaxaca). The genus Renodaeus Distant is redescribed and the new species R. mimeticus sp. n. from Ecuador is described. The genus Zanchisme Kirkaldy is reviewed and the four known species are redescribed. Zanchismeopsidea gen. n. is described to accommodate Z. diegoi sp. n. from Argentina (Santiago del Estero). Provided are habitus illustrations for certain adults (Pilophoropsidea camelus, Pilophoropsis brachyptera Poppius, Renodaeus mimeticus, and Zanchisme mexicanus Carvalho & Schaffner), male and female (when available) color digital images and figures of male genitalia of all species, electron photomicrographs of diagnostic characters for selected species, and keys to the genera and their included species. The taxa treated in this paper are arranged alphabetically by genus and species. © Thomas J. Henry. Source

Bohbot J.D.,Plant science Institute | Durand N.F.,Plant science Institute | Durand N.F.,University Pierre and Marie Curie | Vinyard B.T.,Henry llace Beltsville Agricultural Research Center | And 2 more authors.
Frontiers in Physiology | Year: 2013

Attraction of female Aedes aegypti mosquitoes to 1-octen-3-ol (octenol), CO2, lactic acid, or ammonia emitted by vertebrate hosts is not only contingent on the presence of odorants in the environment, but is also influenced by the insect's physiological state. For anautogenous mosquito species, like A. aegypti, newly emerged adult females neither respond to host odors nor engage in blood-feeding; the bases for these behaviors are poorly understood. Here we investigated detection of two components of an attractant blend emitted by vertebrate hosts, octenol, and CO2, by female A. aegypti mosquitoes using electrophysiological, behavioral, and molecular approaches. An increase in sensitivity of octenol olfactory receptor neurons (ORNs) was correlated with an increase in odorant receptor gene (Or) expression and octenol-mediated attractive behavior from day 1 to day 6 post-emergence. While the sensitivity of octenol ORNs was maintained through day 10, behavioral responses to octenol decreased as did the ability of females to discriminate between octenol and octenol + CO2. Our results show differing age-related roles for the peripheral receptors for octenol and higher order neural processing in the behavior of female mosquitoes.© 2013 Bohbot, Durand, Vinyard and Dickens. Source

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