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      Within-plant distribution of cotton aphid (Hemiptera: Aphididae) in cotton cultivars with colored fibers

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          Abstract

          We describe the vertical and horizontal distribution of the cotton aphid Aphis gossypii Glover within a cotton plant in two cotton (Gossypium hirsutum Linnaeus) cultivars (BRS Safira and BRS Rubí) with colored fiber over the time. Measurements of aphid population dynamics and distribution in the cotton plants were recorded in intervals of seven days. The number of apterous or alate aphids and their specific locations were recorded, using as a reference point the location of nodes on the mainstem of the plant and also those on the leaves present on branches and fruit structures. The number of apterous aphids found on the cultivar BRS Safira (56,515 aphids) was greater than that found on BRS Rubí (50,537 aphids). There was no significant difference between the number of alate aphids found on the cultivars BRS Safira (365 aphids/plant) and BRS Rubí (477 aphids/plant). There were interactions between cotton cultivar and plant age, between plant region and plant age, and between cultivar and plant region for apterous aphids. The results of this study are of great importance in improving control strategies for A. gossypii in the naturally-colored cotton cultivars BRS Safira and BRS Rubí.

          Translated abstract

          Nós descrevemos a distribuição vertical e horizontal do pulgão do algodoeiro Aphis gossypii Glover dentro da planta de algodão (Gossypium hirsutum Linnaeus), em dois cultivares com fibras coloridas (BRS Safira and BRS Rubí) ao longo do seu desenvolvimento. Medidas de dinâmicas de populações e distribuição de A. gossypii nas plantas de algodão foram registradas em intervalos de sete dias. O número de afídeos ápteros ou alados e suas localizações específicas foram registrados, usando-se como ponto de referência a localização do nó no caule principal da planta e também aqueles presentes nas folhas de ramos e estruturas frutíferas. O número de afídeos ápteros encontrados na cultivar BRS Safira (56.515 afídeos) foi maior do que o encontrado na BRS Rubí (50.537 afídeos). Não houve diferença significativa entre o número de afídeos alados encontrados na BRS Safira (365 afídeos/planta) e na BRS Rubí (477 afídeos/planta). Ocorreram interações entre cultivar de algodão e idade da planta, entre região da planta e idade da planta e entre cultivar e região da planta para pulgões ápteros. Os resultados obtidos neste estudo são de grande importância na melhoria das estratégias de controle de A. gossypii nas cultivares de algodão com fibras coloridas BRS Safira e BRS Rubí.

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          Most cited references 36

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          SAS® User's guide: statistics

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            Cotton Pest Management: Part 4. A Brazilian Perspective

             F. S. Ramalho (1994)
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              Diurnal pattern of aphid feeding and its effect on cotton leaf physiology

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                aabc
                Anais da Academia Brasileira de Ciências
                An. Acad. Bras. Ciênc.
                Academia Brasileira de Ciências (Rio de Janeiro )
                1678-2690
                September 2012
                : 84
                : 3
                : 707-721
                Affiliations
                [1 ] Embrapa Brazil
                [2 ] Universidade Federal de Viçosa Brazil
                Article
                S0001-37652012000300013
                Product
                Product Information: website
                Categories
                MULTIDISCIPLINARY SCIENCES

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