Results 81 to 90 of about 137,229 (361)

Effects of Light Level and Nitrogen Supply on the Red Clover–Orobanche Minor Host–Parasite Interaction

open access: yesPlants, 2019
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

Meta‐analysis on effects of Bt‐maize on nontarget invertebrates – Data transportability across continents

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
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

Parasitismo em ser humano por B. microplus (Acari: Ixodidae) em Santa Maria, RS, Brasil Human parasitism by B. microplus (Acari: Ixodidae), Santa Maria, RS, Brazil

open access: yesCiência Rural, 2007
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

open access: yesEcosphere, 2021
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

open access: yesPest Management Science, Volume 81, Issue 4, Page 1851-1859, April 2025.
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

Flypaper for Parasites [PDF]

open access: yesCell, 2004
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]

open access: yes, 2017
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

open access: yesPest Management Science, EarlyView.
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]

open access: yes, 1999
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]

open access: yes, 2017
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

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