Resistance in alfalfa to Aphis craccivora Koch

The cowpea aphid, Aphis craccivora Koch (Aphididae), is considered to be one of the major pests in the semiarid Pampas of Argentina and in other alfalfa (Medicago sativa L.) growing areas of the world. In the present study the antibiotic, antixenotic, and tolerance resistance of eight alfalfa cultiv...

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Autores principales:	Descamps,Lilian R, Sanchez-Chopa,Carolina, Bizet-Turovsky,Jorge
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2015
Materias:	Antibiosis antixenosis cowpea aphid host plant resistance tolerance
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000500010
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spelling	oai:scielo:S0718-583920150005000102018-10-01Resistance in alfalfa to Aphis craccivora KochDescamps,Lilian RSanchez-Chopa,CarolinaBizet-Turovsky,Jorge Antibiosis antixenosis cowpea aphid host plant resistance tolerance The cowpea aphid, Aphis craccivora Koch (Aphididae), is considered to be one of the major pests in the semiarid Pampas of Argentina and in other alfalfa (Medicago sativa L.) growing areas of the world. In the present study the antibiotic, antixenotic, and tolerance resistance of eight alfalfa cultivars to A. craccivora, were investigated under laboratory conditions at 24 ± 1 °C, 65 ± 10% relative humidity, and 14:10 h photoperiod. Antibiosis experiments showed significant differences in the developmental time and adult longevity of the cowpea aphid among the alfalfa cultivars. Intrinsic rate of natural increase (rm) for apterous aphids varied significantly with alfalfa cultivars on which aphids were reared. This value ranged from 0.04 to 0.16 females female-1 d-1, which was the lowest on ’Medina’. Additionally, the estimated net reproductive rate (Ro) and finite rate of increase (X) for apterous aphids were the lowest on ’Medina’. For the antixenosis experiment significant difference was found in aphid’s preference to the alfalfa cultivars. ’Carmina’ and ’Victoria’ were the least preferred by the apterous aphids. For the tolerance experiment ’Carmina’, ’Monarca’, ’SPS6550’ and ’Victoria’ were more tolerant than the other cultivars to A. craccivora. Therefore, our results demonstrated that among the investigated cultivars ’Medina’ displayed antibiosis to A. craccivora, ’Carmina’ and ’Victoria’ expressed antixenosis and tolerance, and ’Monarca’ and ’SPS6550’ were tolerant to this aphid pest.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.75 n.4 20152015-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000500010en10.4067/S0718-58392015000500010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Antibiosis antixenosis cowpea aphid host plant resistance tolerance
spellingShingle	Antibiosis antixenosis cowpea aphid host plant resistance tolerance Descamps,Lilian R Sanchez-Chopa,Carolina Bizet-Turovsky,Jorge Resistance in alfalfa to Aphis craccivora Koch
description	The cowpea aphid, Aphis craccivora Koch (Aphididae), is considered to be one of the major pests in the semiarid Pampas of Argentina and in other alfalfa (Medicago sativa L.) growing areas of the world. In the present study the antibiotic, antixenotic, and tolerance resistance of eight alfalfa cultivars to A. craccivora, were investigated under laboratory conditions at 24 ± 1 °C, 65 ± 10% relative humidity, and 14:10 h photoperiod. Antibiosis experiments showed significant differences in the developmental time and adult longevity of the cowpea aphid among the alfalfa cultivars. Intrinsic rate of natural increase (rm) for apterous aphids varied significantly with alfalfa cultivars on which aphids were reared. This value ranged from 0.04 to 0.16 females female-1 d-1, which was the lowest on ’Medina’. Additionally, the estimated net reproductive rate (Ro) and finite rate of increase (X) for apterous aphids were the lowest on ’Medina’. For the antixenosis experiment significant difference was found in aphid’s preference to the alfalfa cultivars. ’Carmina’ and ’Victoria’ were the least preferred by the apterous aphids. For the tolerance experiment ’Carmina’, ’Monarca’, ’SPS6550’ and ’Victoria’ were more tolerant than the other cultivars to A. craccivora. Therefore, our results demonstrated that among the investigated cultivars ’Medina’ displayed antibiosis to A. craccivora, ’Carmina’ and ’Victoria’ expressed antixenosis and tolerance, and ’Monarca’ and ’SPS6550’ were tolerant to this aphid pest.
author	Descamps,Lilian R Sanchez-Chopa,Carolina Bizet-Turovsky,Jorge
author_facet	Descamps,Lilian R Sanchez-Chopa,Carolina Bizet-Turovsky,Jorge
author_sort	Descamps,Lilian R
title	Resistance in alfalfa to Aphis craccivora Koch
title_short	Resistance in alfalfa to Aphis craccivora Koch
title_full	Resistance in alfalfa to Aphis craccivora Koch
title_fullStr	Resistance in alfalfa to Aphis craccivora Koch
title_full_unstemmed	Resistance in alfalfa to Aphis craccivora Koch
title_sort	resistance in alfalfa to aphis craccivora koch
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392015000500010
work_keys_str_mv	AT descampslilianr resistanceinalfalfatoaphiscraccivorakoch AT sanchezchopacarolina resistanceinalfalfatoaphiscraccivorakoch AT bizetturovskyjorge resistanceinalfalfatoaphiscraccivorakoch
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Resistance in alfalfa to Aphis craccivora Koch

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