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Featured researches published by Ramona Stef.


Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture | 2015

A new problem for western Romania: Metcalfa pruinosa (Hemiptera:Flatidae)

Ioana Grozea; Alina Gogan; Mihai Vlad; Ana Maria Virteiu; Ramona Stef; Alin Carabet; S. Damianov; Teodora Florian

The cicada considered for this study is Metcalfa pruinosa (Say), called flatid plant hopper, a species that has recently caught the attention of experts in Romania. In year 2010, it was seen for the first time in the western part of country and it was identified by some routine observations. Is considered a non-native species knowing that originated in America. Objectives focused primarily exploration the territory in the western part, in order to report the first larval colonies and secondly identification of host plants. Observations were made during three years, 2011 to 2013 and included several points located near the western border. For monitoring of the immature stages (larvae, nymphs) direct observations were made in green spaces, parks, vineyards and orchards. Having in mind that larva is the most important stage, if we refer to damage plants, all our attention was directed to this. Somewhat, the results certify the polyphagism of this species, indicating numerous species of infested plants. Among, frequently infested with larval colonies, in green spaces, were Acer negundo, Acer pseudoplatanus, Acer campestre, Acer platanoides, Tilia cordata, Catalpa bignonioides, Juglans regia, Ligustrum vulgare, Hibiscus syriacus, etc. On the other hand, in the vineyards and orchards, plants affected were Malus domestica, Persica vulgaris, Prunus persica, Prunus armeniaca, Prunus domestica and Vitis vinifera . Currently, in the western part of Romania, over 50 host plants were identified, tree species (shrubs, trees, fruit -trees), culture plants (sunflower, soybean) and a lot of herbaceous species. As regards the spread, cicada is present in 7 counties from west of country and continue to expand on the direction of north, south and east.


African Journal of Agricultural Research | 2011

Metcalfa pruinosa Say (insecta: homoptera: flatidae): A new pest in Romania

Ioana Grozea; Alina Gogan; Ana Maria Virteiu; A. Grozea; Ramona Stef; Levente Molnar; Alin Carabet; S. Dinnesen


Journal of Bioequivalence & Bioavailability | 2013

The Impact of Physical Processes and Chemicals of the Antioxidants (Bioactivity Compounds)

Monica Butnariu; Diana Raba; Ioana Grozea; Ana Maria Virteiu; Ramona Stef


Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture | 2016

The Spread of Nezara viridula (Hemiptera:Pentatomidae) Species from its First Occurrence in Romania

Ioana Grozea; Ana Maria Virteiu; Ramona Stef; Alin Cabaret; Levente Molnar; Viorela Marcu; Diana Draga


Zbornik Radova 44. Hrvatski i 4 Medunarodni Simpozij Agronoma, Opatija, Hrvatska, 16-20 Veljače 2009. | 2009

The presence of Diabrotica virgifera virgifera adults at different altitudes.

Ioana Grozea; Ramona Stef; Alin Carabet; Ana Maria Virteiu


Journal of Biotechnology | 2016

Exploitation spider predators in corn in biological control of invasive species Diabrotica virgifera LC (Coleoptera: Chrysomelidae)

Ioana Grozea; Horatiu Horgos; Ramona Stef; Ana Maria Virteiu; Alin Carabet; Levente Molnar


Journal of Biotechnology | 2015

Biological control of invasive species Metcalfa Pruinosa Say (Insecta: Hemiptera: Flatidae) in ornamentals plants by using Coccinelids

Ioana Grozea; Mihai Vlad; Ana Maria Virteiu; Ramona Stef; Alin Carabet; Levente Molnar; Veaceslav Mazare


Bulletin of the University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca | 2015

Faunistic Study of Ladybirds (Coleoptera: Coccinellidae) in the Banat Region, Romania

Ana Maria Virteiu; Ioana Grozea; Ramona Stef; Mihai Vlad; Ionela Dobrin


Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture | 2015

Trophic Evolution of Southern Green Stink Bugs (Nezara viridula l.) in Western Part of Romania

Ioana Grozea; Ana Maria Virteiu; Ramona Stef; Alin Carabet; Levente Molnar; Teodora Florian; Mihai Vlad


Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture | 2015

Analysis of the Thrips Fauna (Insecta: Thysanoptera) on Flowers of Roses in Western Part of Romania

Ama Maria Virteiu; Ioana Grozea; Ramona Stef; Alin Carabet; Levente Molnar; Teodora Florian; Veaceslav Mazare

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Alin Carabet

University of Agricultural Sciences

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Ioana Grozea

Banat University of Agricultural Sciences and Veterinary Medicine

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Ioana Grozea

Banat University of Agricultural Sciences and Veterinary Medicine

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Levente Molnar

University of Agricultural Sciences

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Ana Maria Virteiu

Banat University of Agricultural Sciences and Veterinary Medicine

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Ana Maria Virteiu

Banat University of Agricultural Sciences and Veterinary Medicine

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Mihai Vlad

University of Agricultural Sciences

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Teodora Florian

University of Agricultural Sciences

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Raluca Trusca

University of Agricultural Sciences

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S. Damianov

University of Agricultural Sciences

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