Results 31 to 40 of about 147,050 (357)

Biological Control of Alfalfa Blotch Leafminer (Diptera: Agromyzidae) in Ontario: Status and Ecology of Parasitoids (Hymenoptera: Braconidae, Eulophidae) 20 Years After Introduction [PDF]

open access: yes, 2018
Two European parasitoid species were released in Ontario during the late 1970\u27s to control the alfalfa blotch leafminer, Agromyza frontella (Rondani) (Diptera: Agromyzidae). One of these, Dacnusa dryas (Nixon) (Hymenoptera: Braconidae), rapidly became
Heimpel, George E, Meloche, Francois
core   +2 more sources

Parasitism, the diversity of life, and paleoparasitology

open access: yesMemorias do Instituto Oswaldo Cruz, 2003
The parasite-host-environment system is dynamic, with several points of equilibrium. This makes it difficult to trace the thresholds between benefit and damage, and therefore, the definitions of commensalism, mutualism, and symbiosis become worthless ...
Adauto Araújo   +4 more
doaj   +1 more source

Natural Parasitism in Acromyrmex landolti Forel (Hymenoptera, Formicidae) in Pastures of Bahia, Brazil

open access: yesSociobiology, 2015
This study aimed to evaluate the occurrence of natural parasitism in Acromyrmex landolti Forel, identify parasitoids associated to the species and to estimate parasitism rates. The experiment was conducted from January to May 2012 in Itapetinga, BA.
Maria Aparecida Castellani   +6 more
doaj   +1 more source

Density, parasitism, and sexual reproduction are strongly correlated in lake Daphnia populations

open access: yesEcology and Evolution, 2021
Many organisms can reproduce both asexually and sexually. For cyclical parthenogens, periods of asexual reproduction are punctuated by bouts of sexual reproduction, and the shift from asexual to sexual reproduction has large impacts on fitness and ...
Camden D. Gowler   +4 more
doaj   +1 more source

Population dynamics of phyllocnistis citrella (Lepidoptera: Gracillariidae) and its parasitoids in Tafí Viejo, Tucumán, Argentina [PDF]

open access: yes, 2006
Seasonal abundance of the citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae), was investigated between Nov 1999 and Apr 2003 in Tafí Viejo (Tucuman province).
Diez, Patricia Alejandra   +2 more
core   +1 more source

Parasitoid complex and parasitism rates of the horse chestnut leafminer, Cameraria ohridella (Lepidoptera: Gracillariidae) in the Czech Republic, Slovakia and Slovenia

open access: yesEuropean Journal of Entomology, 2006
The horse chestnut leaf miner, Cameraria ohridella Deschka & Dimić, is a species of unknown origin that recently invaded most of Europe, causing serious damage to horse chestnut trees, Aesculus hippocastanum. Parasitism was studied over a period of three
Lubomír VOLTER, Marc KENIS
doaj   +1 more source

Protein Supplementation as a Nutritional Strategy to Reduce Gastrointestinal Nematodiasis in Periparturient and Lactating Pelibuey Ewes in a Tropical Environment

open access: yesPathogens, 2022
The study was carried out to evaluate the effect of energy and protein supplementation on parasitological and hematological response during peripartum and lactation of productive and non-productive Pelibuey ewes in a tropical environment.
Yoel López-Leyva   +7 more
doaj   +1 more source

\u3ci\u3eMicroctonus Pachylobii\u3c/i\u3e (Hymenoptera: Braconidae): New Host Record From \u3ci\u3eHylobius Radicis\u3c/i\u3e (Coleoptera: Curculionidae), and Additional Notes on Its Biology [PDF]

open access: yes, 2017
The endoparasite Microctonus pachylobii was discovered parasitizing a new weevil host, Hylobius radicis. Thirteen of the 154 H. radicis adults collected were parasitized (8.5%).
Hoffman, George D, Raffa, Kenneth F
core   +2 more sources

Rare insights into intraspecific brood parasitism and apparent quasi–parasitism in black–capped chickadees

open access: yesAnimal Biodiversity and Conservation, 2011
Genetic analysis of passerine birds often finds evidence of extra–pair copulations within species, but genetic evidence of intraspecific brood parasitism (IBP) and quasi–parasitism (Q–P) are relatively rare. Further, it is even rarer for genetic patterns
K. A. Otter   +3 more
doaj   +1 more source

Parasite infection and the movement of the aquatic snail Potamopyrgus antipodarum along a depth cline

open access: yesEcology and Evolution, 2023
Parasite species that use two or more host species during their life cycle depend on successful transmission between these species. These successive host species may have different habitat requirements.
Frida Feijen   +3 more
doaj   +1 more source

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