Resumo

HENRIQUES, Imaculada da Conceição; MONTEIRO, Ana  e  MOREIRA, Ilídio. Effect of pesticides application on the potato (Solanum tuberosum L.) varieties production, in Huambo country (Angola). Rev. de Ciências Agrárias [online]. 2009, vol.32, n.2, pp.182-193. ISSN 0871-018X.

Trials in complete casual blocks subdivided in the time to compare the behaviour of 3 imported seed-potato cultivars - ‘Diamant’, ‘Romano’, ‘Picasso’ - and 3 regional cultivars - ‘Tchigembo’, ‘Kanjangala’, ‘Boa nova regional’ -, planted in two dates on rain season (October and February) and in a third date (June), in dry season, with irrigation. The trials were repeated in three locals of the Huambo country - Bailundo, Chianga e Calenga - with 50 km of distance. In all seasons and cultivars were applied, or not, pesticides, the fungicide (mancozeb + metalaxil-M) during the two first seasons, to control the potato blight (Phytophthora infestans) and the insecticide (lambda-cihalotrine) on the third season to control the aphids (Myzus persicae). The number and weight of the total and commercial value tubers (Ø > 25 mm), the incidence and severity of the late blight and aphids and the potato vegetative period were evaluated.

Palavras-chave : aphids; potato blight; production.

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