<i>Diuraphis noxia</i>: reproductive behaviour in Argentina

Diuraphis noxia (Kurdjumov) (Rhynchota Aphididae) is an important aphid pest of wheat and barley crops in many countries. Populations of Russian wheat aphid (RWA) from different origins show different reproductive behaviour, but the situation in Argentina was unknown. The aim of the current research...

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Autores principales: Ricci, Elisabet Mónica, Tocho, Erica Fernanda, Dixon, Anthony F. G., Castro, Ana María
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Agrarias
Diuraphis noxia
Russian wheat aphid
Sexual reproduction
Temperature
Photoperiod
Altitude
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/103699
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-103699
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Diuraphis noxia
Russian wheat aphid
Sexual reproduction
Temperature
Photoperiod
Altitude
spellingShingle Ciencias Agrarias
Diuraphis noxia
Russian wheat aphid
Sexual reproduction
Temperature
Photoperiod
Altitude
Ricci, Elisabet Mónica
Tocho, Erica Fernanda
Dixon, Anthony F. G.
Castro, Ana María
<i>Diuraphis noxia</i>: reproductive behaviour in Argentina
topic_facet Ciencias Agrarias
Diuraphis noxia
Russian wheat aphid
Sexual reproduction
Temperature
Photoperiod
Altitude
description Diuraphis noxia (Kurdjumov) (Rhynchota Aphididae) is an important aphid pest of wheat and barley crops in many countries. Populations of Russian wheat aphid (RWA) from different origins show different reproductive behaviour, but the situation in Argentina was unknown. The aim of the current research was to determine the reproductive behaviour of RWA in Argentina based on samples from populations at six different localities with contrasting land use, altitude and climate. RWA were collected from cultivated and wild grasses from February to December 2005, and 10-15 colonies of aphids were established by collecting parthenogenetic adult females from each population. These colonies were kept under natural conditions at La Plata (36°36′ South Latitude) from 21 December 2005 to 21 December 2007. In more than half of the colonies, oviparous females and eggs were recorded in both years when temperatures were low and the photoperiod either short or increasing and relatively long. Consequently, oviparous females and eggs were recorded from early autumn (April) until the following spring (October), when day length was 11:33 and 13:44 hours, respectively. In both years the temperature and the altitude at the place of origin were highly correlated with the timing of sexual development. The production of eggs enables RWA to survive periods of adverse conditions and generate variability. Thus, by reproducing sexually, RWA may be able to adapt to new environmental conditions and give rise to new, more aggressive biotypes, which can overcome the current resistant varieties of wheat.
format Articulo
Articulo
author Ricci, Elisabet Mónica
Tocho, Erica Fernanda
Dixon, Anthony F. G.
Castro, Ana María
author_facet Ricci, Elisabet Mónica
Tocho, Erica Fernanda
Dixon, Anthony F. G.
Castro, Ana María
author_sort Ricci, Elisabet Mónica
title <i>Diuraphis noxia</i>: reproductive behaviour in Argentina
title_short <i>Diuraphis noxia</i>: reproductive behaviour in Argentina
title_full <i>Diuraphis noxia</i>: reproductive behaviour in Argentina
title_fullStr <i>Diuraphis noxia</i>: reproductive behaviour in Argentina
title_full_unstemmed <i>Diuraphis noxia</i>: reproductive behaviour in Argentina
title_sort <i>diuraphis noxia</i>: reproductive behaviour in argentina
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/103699
work_keys_str_mv AT riccielisabetmonica idiuraphisnoxiaireproductivebehaviourinargentina
AT tochoericafernanda idiuraphisnoxiaireproductivebehaviourinargentina
AT dixonanthonyfg idiuraphisnoxiaireproductivebehaviourinargentina
AT castroanamaria idiuraphisnoxiaireproductivebehaviourinargentina
bdutipo_str Repositorios
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