Identification of the wood-borer and the factors affecting its attack on Caryocar brasiliense trees in the Brazilian Savanna/Identificacao do broqueador de tronco e os fatores que afetam o seu ataque em arvores de Caryocar brasiliense no cerrado brasileiro

The objectives of this work were to identify the wood-borer of the trunk of Caryocar brasiliense Camb. (Caryocaraceae) and the effects of tree size, chemical and physical soil attributes, and floristic diversity in its attack. The wood-boring caterpillar of the trunck of C. brasiliense belongs to th...

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Veröffentlicht in:Acta scientiarum. Agronomy 2011-10, Vol.33 (4), p.589-596
Hauptverfasser: Leite, Germano Leao Demolin, Alves, Sergio Monteze, Nascimento, Aline Fonseca, Lopes, Paulo Sergio do Nascimento, Ferreira, Paulo Sergio Fiuza, Zanuncio, Jose Cola
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Sprache:eng ; spa
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Zusammenfassung:The objectives of this work were to identify the wood-borer of the trunk of Caryocar brasiliense Camb. (Caryocaraceae) and the effects of tree size, chemical and physical soil attributes, and floristic diversity in its attack. The wood-boring caterpillar of the trunck of C. brasiliense belongs to the family Cossidae (Lepidoptera). The number of pupae and the amount of sawdust produced by the wood-borer per tree was higher in the pasture 1 of Montes Claros and pasture in Ibiracatu than in the other four areas (pastures and savanna in Montes Claros and savanna in Ibiracatu). The number of pupae and the amount of sawdust was highest in the trunks of trees with diameters having a breast height (DBH) more than 30 cm. This may explain the severity of attack in the areas mentioned above, which contain a higher percentage of plants with DBH> 30 cm. The soil properties also positively associate with higher attack of the woodborer on trees when the soil is rich in potassium, calcium, magnesium, sum of bases, capacity of cationic exchange, and organic matter, while there was a negative correlation between attack and fine sand content. Systems with less floristic diversity, particularly trees of other species, may concentrate the attack of the wood-borer in the trunks of C. Brasiliense trees. Keywords: pequi, soil, diameter of trunk, floristic diversity. Os objetivos deste trabalho foram identificar o broqueador do tronco de Caryocar brasiliense Camb. (Caryocaraceae) e os efeitos de tamanho de arvore, atributos quimico-fisicos do solo e da diversidade floristica em seu ataque. A lagarta broqueadora do tronco de C. brasiliense pertence a familia Cossidae (Lepidoptera). O numero de pupas e de serragem do broqueador por arvore foi maior na pastagem (1) em Montes Claros e pastagem em Ibiracatu do que nas outras quatro areas (pastagens e cerrado em Montes Claros e cerrado em Ibiracatu). O numero de pupas e da quantidade de serragem do broqueador foi maior em arvores cujo diametro de tronco na altura do peito (DAB) foi superior a 30 cm. Esse fato pode ser uma das razoes para o maior ataque nas areas mencionadas acima devido a maior percentagem de plantas com DAB > 30 cm. As propriedades do solo positivamente associadas com maior ataque do broqueador do tronco foram potassio, calcio, magnesio, soma de bases, capacidade de troca cationica e materia organica e negativamente correlacionado com areia fina. Sistemas com menor diversidade floristica, principalmente arvores de outr
ISSN:1679-9275
1807-8621
DOI:10.4025/actasciagron.v33i4.8629