Results 71 to 80 of about 376 (151)

The damage risk evaluation of Aphis gossypii on wheat by host shift and fitness comparison in wheat and cotton

open access: yesJournal of Integrative Agriculture, 2018
Aphids are considered as one of the key pests for wheat production worldwide. Major aphid species that infest wheat in China include Sitobion avenae, Rhopalosiphum padi, Schizaphis graminum and Metopolophium dirhodum.
Yin-jun FAN   +6 more
doaj   +1 more source

METOPOLOPHIUM DIRHODUM (WALKER) (HOMOPTERA: APHIDIDAE) NEWLY RECORDED FROM AUSTRALIA [PDF]

open access: yesAustralian Journal of Entomology, 1984
Abstract Metopolophium dirhodum (Walker), the rose‐grain aphid, is recorded for the first time from Australia.
openaire   +1 more source

THE OCCURRENCE OF APHIDS ON SWEET MAIZE IN SOUTH-EASTERN POLAND

open access: yesActa Scientiarum Polonorum: Hortorum Cultus, 2015
In Poland sweet maize is a small-acreage crop, and because of this no complex plan for the protection of this plant against pests and other harmful organisms has been developed. Since the enforcement of integrated pest management (IPM) in the EU in 2014 
Paweł K. Bereś
doaj  

Protective effect and economic impact of insecticide application methods on barley

open access: yesPesquisa Agropecuária Brasileira, 2014
The objective of this work was to evaluate the protective effect of different forms of insecticide application on the transmission of yellow dwarf disease in barley cultivars, as well as to determine the production costs and the net profit of these ...
Alfred Stoetzer   +5 more
doaj   +1 more source

Length of prematurity period in wheat cultivars determines maximum cereal aphid abundance

open access: yesPlant Protection Science, 2016
Maximum aphid numbers on wheat are positively related to the length of the period elapsed from immigration to the population peak. We predicted that maximum abundances on late maturing cultivars would be greater than on early ones.
Martina Trávníčková   +3 more
doaj   +1 more source

REPORTE DOCUMENTADO DE Metopolophium dirhodum EN TRIGO EN EN YURIRIA, GUANAJUATO

open access: yesRevista Ciencia e Innovación Agroalimentaria de la Universidad de Guanajuato
Durante el ciclo otoño-invierno 2024-2025 se realizó un estudio en una parcela de trigo en Yuriria, Guanajuato, con el objetivo de identificar insectos fitófagos bajo condiciones reales de cultivo sin uso de insecticidas. Se aplicó un muestreo sistemático tipo “cinco de oros” en siete fechas, recolectando pulgones para su identificación en laboratorio.
A. M. Tafoya-Said   +3 more
openaire   +1 more source

The Process of Aphid Egg-Laying and the Little Known Role of the Coccinellidae in Aphid Egg Destruction in Poland – Preliminary Results

open access: yesJournal of Plant Protection Research, 2014
No detailed studies have been conducted in Poland with regard to aphid eggs or egg survival in particular. So far, no studies have been conducted concerning the role of ladybird beetles in reducing the number of aphid eggs in spring, before the ...
Lubiarz Magdalena, Cichocka Elżbieta
doaj   +1 more source

Natural biological control of aphids (Hemiptera: Aphididae) in a wheat field by parasitoids (Hymenoptera, Aphidiinae) in Medianeira, PR, Brazil/
Controle biológico natural de pulgões (Hemiptera: Aphididae) em lavoura de trigo por parasitóides (Hymenoptera, Aphidiinae), no município de Medianeira, PR, Brasil

open access: yesSemina: Ciências Agrárias, 2005
Aphids constitute one of the main phytosanitary problems in wheat crops in southern Brazil, and are the target of a biological control program with parasitoids implemented in Brazil since the 1970’s.
Ayres de O. Menezes Junior   +4 more
doaj   +1 more source

Pulgões do trigo e ação de parasitóides em Augusto Pestana, nordeste do estado do Rio Grande do Sul, Brasil

open access: yesRevista Brasileira de Agroecologia, 2013
A compreensão das relações ecológicas é fundamental para o estabelecimento de estratégias de manejo de pulgões em agroecossistemas. O objetivo deste trabalho foi avaliar a ocorrência de pulgões associados à cultura do trigo e o nível de parasitismo ...
Claudio Cesar de Lima Machado   +1 more
doaj  

Rapid Responses of Winter Aphid-Parasitoid Communities to Climate Warming

open access: yesFrontiers in Ecology and Evolution, 2018
Consequences of inter-annual environmental fluctuations, including those associated with climate change, can have a knock-on effect from individual to community scale.
Kévin Tougeron   +6 more
doaj   +1 more source

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