Neotropical Entomology (2001) 30, 495-496
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André L. Lourenção, Francisco S. Kasai, Denise Návia, Ignácio J. Godoy and Carlos H.W. Flechtmann (2001)
Ocorrência de Tetranychus ogmophallos Ferreira and Flechtmann (Acari: Tetranychidae) em Amendoim no Estado de São Paulo
[Tetranychus ogmophallos Ferreira and Flechtmann (Acari: Tetranychidae) on peanut in the State of São Paulo, Brazil]
Neotropical Entomology 30 (3), 495-496
Abstract: High mite infestations were observed during two consecutive years (1999 and 2000) in peanut fields of cultivar IAC-Caiapó, at the Adamantina Experiment Station of Instituto Agronômico de Campinas (IAC). The mites were identified as Tetranychus ogmophallos Ferreira and Flechtmann, and the symptoms consisted of an initial silver-like chlorosis on leaves, progressing to formation of a great ammount of web structures covering the plants. For a preliminary evaluation of the damage, two 1.000 m2 plots were marked during the 1998/99 field growing. One was not treated with pesticide and the other was chemically sprayed for mite control. In both plots, pod harvesting was done at three intervals, and pod yield within each plot was estimated as the average of harvesting intervals. Comparison between treated and untreated plots indicated a 76,5% yield reduction due to mite infestation. T. ogmophallos has been previously known from Arachis pintoi, a wild peanut species, but no report of its occurrence on cultivated peanut (Arachis hipogaea) was known.
Altas infestações do ácaro Tetranychus ogmophallos Ferreira and Flechtmann foram observadas em plantios de amendoim cultivar IAC-Caiapó realizados na Estação Experimental de Adamantina, Estado de São Paulo, pertencente ao Instituto Agronômico de Campinas (IAC), durante dois anos agrícolas consecutivos (1998/99 e 2000). As infestações foram caracterizadas inicialmente pelo prateamento das folhas com posterior formação de grande quantidade de teia cobrindo as plantas. T. ogmophallos foi descrito a partir de exemplares coletados em Arachis pintoi e, até o momento, não havia sido registrado infestando amendoim cultivado. No plantio de 1998/99, duas áreas de 1000 m2 foram demarcadas para a avaliação do dano causado pelo ácaro nas plantas de amendoim; em uma dessas áreas, o ácaro foi controlado quimicamente. Com base em três épocas distintas de colheita nas duas áreas, verificou-se redução de 76,5% na média de produção de vagens.
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Ocorrência de Tetranychus ogmophallos Ferreira and Flechtmann (Acari: Tetranychidae) em Amendoim no Estado de São Paulo
[Tetranychus ogmophallos Ferreira and Flechtmann (Acari: Tetranychidae) on peanut in the State of São Paulo, Brazil]
Neotropical Entomology 30 (3), 495-496
Abstract: High mite infestations were observed during two consecutive years (1999 and 2000) in peanut fields of cultivar IAC-Caiapó, at the Adamantina Experiment Station of Instituto Agronômico de Campinas (IAC). The mites were identified as Tetranychus ogmophallos Ferreira and Flechtmann, and the symptoms consisted of an initial silver-like chlorosis on leaves, progressing to formation of a great ammount of web structures covering the plants. For a preliminary evaluation of the damage, two 1.000 m2 plots were marked during the 1998/99 field growing. One was not treated with pesticide and the other was chemically sprayed for mite control. In both plots, pod harvesting was done at three intervals, and pod yield within each plot was estimated as the average of harvesting intervals. Comparison between treated and untreated plots indicated a 76,5% yield reduction due to mite infestation. T. ogmophallos has been previously known from Arachis pintoi, a wild peanut species, but no report of its occurrence on cultivated peanut (Arachis hipogaea) was known.
Altas infestações do ácaro Tetranychus ogmophallos Ferreira and Flechtmann foram observadas em plantios de amendoim cultivar IAC-Caiapó realizados na Estação Experimental de Adamantina, Estado de São Paulo, pertencente ao Instituto Agronômico de Campinas (IAC), durante dois anos agrícolas consecutivos (1998/99 e 2000). As infestações foram caracterizadas inicialmente pelo prateamento das folhas com posterior formação de grande quantidade de teia cobrindo as plantas. T. ogmophallos foi descrito a partir de exemplares coletados em Arachis pintoi e, até o momento, não havia sido registrado infestando amendoim cultivado. No plantio de 1998/99, duas áreas de 1000 m2 foram demarcadas para a avaliação do dano causado pelo ácaro nas plantas de amendoim; em uma dessas áreas, o ácaro foi controlado quimicamente. Com base em três épocas distintas de colheita nas duas áreas, verificou-se redução de 76,5% na média de produção de vagens.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language:
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Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
damage/losses/economics
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Tetranychus ogmophallos | Groundnut/peanut (Arachis hypogaea) | Brazil (south) |
