Population fluctuation and spatial dependence of Aleurocanthus woglumi Ashby, 1915 em Citrus latifolia

The citrus blackfly, Aleurocanthus woglumi, presents high dispersal ability and adaptability to diverse climatic conditions as well as large reproductive potential. This study aimed to evaluate the populational fluctuation and to characterize the pattern of spatial dependence of citrus blackfly in a...

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Published inRevista Brasileira de fruticultura Vol. 36; no. 4; p. 862
Main Authors Vieira, Daniele Lavra, Ottati, Angelo Luiz Tadeu, De Lemos, Raimunda Nonata Santos, Lopes, Gislane Da Silva, Araujo, Jose Ribamar Gusmao
Format Journal Article
LanguageSpanish
Published Sociedade Brasileira de Fruticultura 01.12.2014
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Abstract The citrus blackfly, Aleurocanthus woglumi, presents high dispersal ability and adaptability to diverse climatic conditions as well as large reproductive potential. This study aimed to evaluate the populational fluctuation and to characterize the pattern of spatial dependence of citrus blackfly in a commercial orchard of Tahiti lime (Citrus latifolia Tanaka), in Sao Jose de Ribamar county, state of Maranhao. A global positioning system (GPS) and geographic information system (GIS) were used to locate the points of the samples, to characterize the pattern of distribution, calculate the aggregation area and produce distribution maps of the adults of citrus blackfly in the orchard. The average total number of citrus blackflies was higher during the rainy season and there were significant correlations between the variables rainfall, relative humidity and total number of adults. The spatial distribution of A. woglumi in the orchard is aggregated, adjusting the calculated variograms to the spherical model in the dry and rainy seasons. The insects showed an area of mean aggregation of 162,092 [m.sup.2] in the rainy season and 9,615 [m.sup.2] in the dry season. Thus, to obtain a reliable estimate of citrus blackfly populations, at least one trap should be used every 17 hectares in the rainy season and one trap per hectare in the dry season. Index terms: Citrus blackfly, spatial distribution, geostatistics. A mosca-negra-dos-citros, Aleurocanthus woglumi, apresenta elevada capacidade de dispersao e adaptacao a diversas condicoes climaticas, alem de grande potencial reprodutivo. O presente trabalho teve como objetivo avaliar a flutuacao populacional e caracterizar o padrao de dependencia espacial de A. woglumi em um pomar de lima- acida Tahiti (Citrus latifolia, Tanaka), no municipio de Sao Jose de Ribamar, Estado do Maranhao. Um sistema de posicionamento global (GPS) e um sistema de informacao geografica (SIG) foram usados para localizar os pontos das amostras, caracterizar o padrao de distribuicao, calcular a area de agregacao e elaborar mapas de distribuicao dos adultos de mosca-negra-dos-citros dentro do pomar. O numero medio total de moscas negras foi maior durante a estacao chuvosa e observaram-se correlacoes significativas entre as variaveis precipitacao pluvial, umidade relativa do ar e numero total de adultos. A distribuicao espacial A. woglumi no pomar e agregada, ajustando-se os variogramas calculados ao modelo esferico nas estacoes seca e chuvosa. Os insetos mostraram uma area de agregacao media de 162.092 [m.sup.2] na estacao chuvosa e de 9.615 [m.sup.2] na estacao seca. Para se obter uma estimativa confiavel de populacoes de mosca-negra-dos-citros, pelo menos uma armadilha deve ser usada a cada 17 hectares na estacao chuvosa e uma armadilha por hectare na estacao seca. Termos pra indexacao: Mosca-negra-dos-citros, distribuicao espacial, geoestatistica.
AbstractList The citrus blackfly, Aleurocanthus woglumi, presents high dispersal ability and adaptability to diverse climatic conditions as well as large reproductive potential. This study aimed to evaluate the populational fluctuation and to characterize the pattern of spatial dependence of citrus blackfly in a commercial orchard of Tahiti lime (Citrus latifolia Tanaka), in Sao Jose de Ribamar county, state of Maranhao. A global positioning system (GPS) and geographic information system (GIS) were used to locate the points of the samples, to characterize the pattern of distribution, calculate the aggregation area and produce distribution maps of the adults of citrus blackfly in the orchard. The average total number of citrus blackflies was higher during the rainy season and there were significant correlations between the variables rainfall, relative humidity and total number of adults. The spatial distribution of A. woglumi in the orchard is aggregated, adjusting the calculated variograms to the spherical model in the dry and rainy seasons. The insects showed an area of mean aggregation of 162,092 [m.sup.2] in the rainy season and 9,615 [m.sup.2] in the dry season. Thus, to obtain a reliable estimate of citrus blackfly populations, at least one trap should be used every 17 hectares in the rainy season and one trap per hectare in the dry season. Index terms: Citrus blackfly, spatial distribution, geostatistics. A mosca-negra-dos-citros, Aleurocanthus woglumi, apresenta elevada capacidade de dispersao e adaptacao a diversas condicoes climaticas, alem de grande potencial reprodutivo. O presente trabalho teve como objetivo avaliar a flutuacao populacional e caracterizar o padrao de dependencia espacial de A. woglumi em um pomar de lima- acida Tahiti (Citrus latifolia, Tanaka), no municipio de Sao Jose de Ribamar, Estado do Maranhao. Um sistema de posicionamento global (GPS) e um sistema de informacao geografica (SIG) foram usados para localizar os pontos das amostras, caracterizar o padrao de distribuicao, calcular a area de agregacao e elaborar mapas de distribuicao dos adultos de mosca-negra-dos-citros dentro do pomar. O numero medio total de moscas negras foi maior durante a estacao chuvosa e observaram-se correlacoes significativas entre as variaveis precipitacao pluvial, umidade relativa do ar e numero total de adultos. A distribuicao espacial A. woglumi no pomar e agregada, ajustando-se os variogramas calculados ao modelo esferico nas estacoes seca e chuvosa. Os insetos mostraram uma area de agregacao media de 162.092 [m.sup.2] na estacao chuvosa e de 9.615 [m.sup.2] na estacao seca. Para se obter uma estimativa confiavel de populacoes de mosca-negra-dos-citros, pelo menos uma armadilha deve ser usada a cada 17 hectares na estacao chuvosa e uma armadilha por hectare na estacao seca. Termos pra indexacao: Mosca-negra-dos-citros, distribuicao espacial, geoestatistica.
Audience Trade
Author Vieira, Daniele Lavra
Lopes, Gislane Da Silva
Ottati, Angelo Luiz Tadeu
Araujo, Jose Ribamar Gusmao
De Lemos, Raimunda Nonata Santos
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  fullname: Lopes, Gislane Da Silva
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Snippet The citrus blackfly, Aleurocanthus woglumi, presents high dispersal ability and adaptability to diverse climatic conditions as well as large reproductive...
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StartPage 862
SubjectTerms Aleyrodidae
Analysis
Citrus
Citrus fruits
Geographic information systems
Global Positioning System
Title Population fluctuation and spatial dependence of Aleurocanthus woglumi Ashby, 1915 em Citrus latifolia
Volume 36
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