Aphid activity in an area cultivated with corn in Manfredi (Province of Córdoba, Argentina)
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Abstract
Taking into account the importance of aphids as vectors of the maize dwarf mosaic potyvirus, this study was carried out to evaluate which aphid species are present on maize (Zea mays L.) in the EEA-INTA Manfredi, as well as their fluctuations of flight activity and its correlation with climatic variables. During the crop development (1992), 2348 aphids were detected in yellow traps, distributed in 42 species and 28 genera. Therioaphis trifolii was the most frequent species. Nearctaphis bakeri was collected for the first time in Córdoba province. Temperature values were negatively correlated with the flight of Rhopalosiphum padi and Capitophorus elaeagni. Furthermore, Rhopalosiphum maidis positively correlated with the maximum rainfall. The highest flight activity was registered during the middle of the maize crop development. Dekalb 4F37 was more colonized than Norkin 4-S284 and Morgan 306. Metopolophium dirhodum was the aphid most frequently found on maize plants. The species found in this study—Acyrthosiphon pisum, Aphis craccivora, Aphis fabae, Aphis gossypii, Aphis nerii, Macrosiphum euphorbiae, M. dirhodum, Myzus persicae, R. maidis, R. padi, Schizaphis graminum, and Sitobion avenae—are cited as vectors of the maize dwarf mosaic potyvirus.
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