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Os ácaros na cultura da amora em estufa e infestantes

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Resumo:Acarological surveys were carried out fortnightly from March to June 2011 on blackberries and weeds in a greenhouse at Fataca Experimental Farm in Odemira, in order to study species diversity and population interaction. This study focused on two blackberry cultivars, ‘Ouachita’ and ‘Karaka Black’. Sixteen mite species were identified on blackberries. The redberry mite Acalitus essigi (Hassan) was the most noxious mite in both cultivars, causing severe damage. However, the late maturing Ouachita cultivar was the most attacked by this eriophyid mite. The most common predacious mites were the stigmaeid Agistemus longisetus Gonzalez and the phytoseiids Amblyseius stipulatus Athias-Henriot and Amblyseius californicus (McGregor). From the 36 weed species identified, 22 were host plants of mites with agricultural interest, 14 mite species being identified. Phytoseiids, especially A. stipulatus, observed on 13 weed species, indifferent tydeids, in particular Orthotydeus californicus (Banks), observed on 10 weed species, and the stigmaeid A. longisetus, observed on seven weed species, were the predominant mites. These mite species also occurred on blackberries. The most important host weeds of mites were Amaranthus deflexus L., Chenopodium murale L., Conyza bonariensis (L.) Cronq., Conyza canadensis (L.) and Solanum nigrum L., mainly associated to predators, A. stipulatus and A. longisetus. From acarological point of view, safeguarding the competition relatively to some vegetal species, ground cover vegetation can be an important component of conservation biological control in blackberry crop, because host weeds of mites are mostly repositories of predacious species
Autores principais:Pina, Silvia
Outros Autores:Ferreira, Maria dos Anjos; Calha, Isabel; Figueiredo, Elisabete
Assunto:Acalitus essigi Agistemus longisetus phytoseiids Odemira
Ano:2012
País:Portugal
Tipo de documento:documento de conferência
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Lisboa
Idioma:português
Origem:Repositório da Universidade de Lisboa

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