ocorrência e controle de lesmas do gênero omalonyx (gastropoda, succineidae), pragas de capim-elefante pennisetum purpureum (poaceae) em rio preto da eva, amazonas occurrence and control of omalonyx slugs (gastropoda, succineidae), pests of the elephant-grass pennisetum purpureum (poaceae) in rio preto da eva, amazonas

Clicks: 336
ID: 244859
2012
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Abstract
Lesmas do gênero Omalonyx d'Orbigny, 1837 são hermafroditas, herbívoras, de distribuição neotropical e vivem em plantas aquáticas, nas demais vegetações adjacentes e em solo úmido próximo a ambientes de água doce. No presente trabalho reporta-se a ocorrência atípica de O. pattersonae Tillier, 1981 e de Omalonyx sp. em área de terra firme, distante de ambiente aquático. Estas espécies aqui reportadas são simpátricas e devido à alta densidade populacional e prejuízos causados às folhas do capim-elefante Pennisetum purpureum Schumach, são caracterizadas como pragas agrícolas. No período da noite as lesmas se alimentavam das folhas do capim elefante e durante o dia permaneciam escondidas na base do caule, próximo a superfície úmida do solo. A aplicação de cal hidratada sobre agregados de indivíduos de Omalonyx spp foi um método efetivo para o controle das populações. As alterações ambientais dos ecossistemas amazônicos para uso agrícola e/ou urbanização tem promovido o aumento populacional de espécies que se adaptam a novos habitats e geralmente se tornam pragas de difícil controle.
Slugs of the genus Omalonyx d'Orbigny, 1837 are hermaphrodites, herbivorous, distributed on Neotropical regions, living on aquatic plants, moist soil and terrestrial vegetation close to freshwater systems. The present paper reports the atypical occurrence of O. pattersonae Tillier, 1981 and Omalonyx sp. in an upland area far from any aquatic environment. Both species reported here are sympatric and due to the high populations density and damages caused on leaves of elephant-grass Pennisetum purpureum Schumach, they are recognized as agricultural pests. During the night, the slugs feed on the grass leaves and at the daylight they stayed hidden in the base of stems, near the moist soil surface. The use of hydrated lime distributed over the aggregations of Omalonyx spp. showed to be an effective method to control the populations. The environmental changes in the Amazonian ecosystems for agricultural or urban purposes have promoted the increase of populations of native species that adapt in the new habitat and usually become pests that are difficult to control.
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Authors ;Marcos Vinicius Bastos Garcia;Janine Oliveira Arruda;Daniel Mansur Pimpão;Terezinha Batista Garcia
Journal tumour biology : the journal of the international society for oncodevelopmental biology and medicine
Year 2012
DOI
10.1590/S0044-59672012000200007
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000200007
Keywords
control amazonia mollusks hydrated limescience (general)

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