Results 11 to 20 of about 291 (121)

Primary parasitoid and hyperparasitoid guilds (hymenoptera) of grain aphid (Sitobion avenae F.) in northern Poland [PDF]

open access: yesArchives of Biological Sciences, 2014
The aim of this study was to determine and compare the guilds of parasitic Hymenoptera associated with the grain aphid on rye and winter wheat. Of the seven species of primary parasitoids (Braconidae: Aphidiinae, Aphelinidae), parasitizing ...
Barczak T.   +2 more
doaj   +1 more source

Enemigos naturales de áfidos (Hemíptera: Aphididae) presentes en zonas productoras de trigo en Paraguay

open access: yesInvestigación Agraria, 2018
En los agroecosistemas, existen enemigos naturales controladores de áfidos de cereales, regulando la población de los mismos. El estudio de la identificación y cuantificación es importante para el manejo integrado de plagas del trigo.
Rebeca González Torres   +3 more
doaj   +1 more source

Distribution and diversity of wheat aphid parasitoids (Hymenoptera: Braconidae: Aphidiinae) in Iran

open access: yesEuropean Journal of Entomology, 2008
Eleven species of parasitoids were found to attack 7 species of wheat aphids in Iran. The Simpson's Index of diversity (D) used to compare the aphidiine diversity in various cereal crop systems in geographically different regions of Iran ranged from 0 ...
Ehsan RAKHSHANI   +6 more
doaj   +1 more source

The effect of different temperature on vital characters of Aphidius matricariae ( Haliday ) [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2015
The study showed that the temperature impact on some of the vital qualities of an intruder Aphidius matricariae when his breeding at different temperatures ,As the results of the study showed that the treatment of thermal 20 C outperformed morally and ...
Raad H. Awad, Juhaina I. Mohammed
doaj   +1 more source

Primary parasitoid and hyperparasitoid guilds (hymenoptera) of grain aphid (Sitobion avenae F.) in northern Poland [PDF]

open access: yesArchives of Biological Sciences, 2015
The aim of this study was to determine and compare the guilds of parasitic Hymenoptera associated with the grain aphid on rye and winter wheat in northern Poland. Of the seven species of primary parasitoids (Braconidae: Aphidiinae, Aphelinidae),
Barczak Tadeusz   +2 more
doaj   +1 more source

The first record of Aphidius ervi Haliday in Slovenia

open access: yesActa Agriculturae Slovenica, 2009
In 2008, a lucerne aphid parasitoid Aphidius ervi Haliday was first recorded in Slovenia. This oligophagous parasitoid is used as biological control agent against bigger aphid species. By sampling aphid mummies on different locations in Slovenia in 2008,
Katarina KOS   +3 more
doaj   +1 more source

Non-consumptive effects stabilize herbivore control over multiple generations.

open access: yesPLoS ONE, 2020
Understanding the factors that influence predator-prey dynamics requires an investigation of oscillations in predator and prey population sizes over time. However, empirical studies are often performed over one or fewer predator generations.
Kathryn S Ingerslew, Deborah L Finke
doaj   +1 more source

Aphids of ornamental plants and winter vegetables and their aphidiine parasitoids (Hymenoptera: Braconidae) in Aligarh region, Uttar Pradesh

open access: yesJournal of Threatened Taxa, 2010
A survey was conducted in Aligarh District of Uttar Pradesh, India. A total of 14 pest aphid were found infesting 13 ornamental plants and 14 winter vegetables of the area. They were categorized based on injury status.
U. Rafi, M.K. Usmani, M.S. Akhtar
doaj   +1 more source

Morphological variability in wing size and wing shape among species Aphidius absinthi Marshall, A. Rosae haliday and A. Urticae Haliday (Hymenoptera: Braconidae: Aphidiinae) [PDF]

open access: yesKragujevac Journal of Science, 2017
In this paper, we applied traditional and geometric morphometric methods to analyze variability in wing size and wing shape among species Aphidius absinthi Marshall, A. rosae Haliday and A. urticae Haliday.
Mitrovski-Bogdanović Ana S.   +1 more
doaj   +1 more source

New evidence of parasitoids of pest aphids on roses and grapevine in Turkey (Hem., Aphididae; Hym., Braconidae, Aphidiinae)

open access: yesJournal of Entomological and Acarological Research, 2010
Aphidius eglanteriae as a parasitoid of Chaetosiphon tetrarhodum/ Rosa is newly recorded for Turkey. Short information about its parasitism rate and distribution in Isparta Province, Turkey, is given.
Shalva Barjadze   +3 more
doaj   +1 more source

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