Results 81 to 90 of about 137,229 (361)
Infection by holoparasitic plants typically causes decreases in host mass, thought to be primarily as a result of resource abstraction. Inverse relationships have been noted between the number of Orobanche spp.
Joel I. Jokinen, Louis J. Irving
doaj +1 more source
Maize varieties producing insecticidal proteins from Bacillus thuringiensis (Bt) have become an important component of integrated pest management worldwide. For regulatory approval of such plants, risks to the environment need to be assessed. To make such assessments less expensive and time‐consuming, conclusions drawn from data collected in one region
Michael Meissle+2 more
wiley +1 more source
Este trabalho tem como objetivo relatar um caso de parasitismo em ser humano por Boophilus microplus, ocorrido no bairro Alto da Boa Vista, na cidade de Santa Maria, Rio Grande do Sul. Os bovinos, cães e eqüinos apresentavam uma alta carga parasitária. O
João Fábio Soares+3 more
doaj +1 more source
Environmental variability affects optimal trade‐offs in ecological immunology
The costs of mounting and maintaining an immune response lead to trade‐offs with investment in (or maintenance of) other organ systems or functions such as reproduction, as has been observed in several taxa, including birds, insects, and mammals.
Devin Kirk+3 more
doaj +1 more source
Assessing pest control treatments from phenology models and field data
Theoretical effect of two larvicide sprays, two delayed larvicide sprays that follow an oil treatment, mating disruption, and mating disruption plus four virus sprays on codling moth larva (brown for treated versus pink for untreated) and adult (dark green for treated versus light green for untreated) phenology.
Diego F. Rincon+2 more
wiley +1 more source
In this issue, Kamhawi et al. (2004) describe the identification of an insect galectin as the receptor for the stage-specific Leishmania adhesin lipophosphoglycan (LPG). This interaction is critical for parasite survival in the midgut of its sand fly vector. The results open new avenues for studies of insect immunity, transmission binding vaccines, and
Stephen M. Beverley, Deborah E. Dobson
openaire +3 more sources
Leech Parasitism of the Gulf Coast Box Turtle, Terrapene carolina major (Testudines:Emydidae) in Mississippi, USA [PDF]
Ten leeches were collected from a Gulf Coast box turtle, Terrapene carolina major, found crossing a road in Gulfport, Harrison County, Mississippi, USA. Eight of the leeches were identified as Placobdella multilineata and 2 were identified as Helobdella
Hammond, C. I.+4 more
core +3 more sources
Indirect plant defense may provide economically important pest suppression in sorghum
Laboratory measures of sorghum direct and indirect plant resistance traits aligned with natural enemy recruitment and pest suppression in the field. Abstract BACKGROUND A promising strategy to optimize biological control of insect pests is selecting crop varieties with indirect defense traits.
Emily M. Russavage+6 more
wiley +1 more source
Secondary reproductive strategies in Pacific black brant (Branta bernicla nigricans) [PDF]
Thesis (M.S.) University of Alaska Fairbanks, 1999Waterfowl are known to use secondary reproductive strategies, both extra-pair copulations and intraspecific brood parasitism, to increase fitness. We used five polymorphic microsatellite loci to determine
Svete, Pamela A.
core
Epizootiology of the Fungal Pathogen, \u3ci\u3eZoophthora Phytonomi\u3c/i\u3e (Zygomycetes: Entomophthorales) in Field Populations of Alfalfa Weevil (Coleoptera: Curculionidae) Larvae in Illinois [PDF]
The influence of the fungal pathogen, Zoophthora phytonomi, on larvae of the alfalfa weevil, Hypera postica, was studied in three alfalfa fields in Illinois. Disease epizootics occurred in all three fields and disease onset was ob- served within a fairly
Armbrust, Edward J+3 more
core +2 more sources