Introduction We analyzed the vertical and monthly distributions of culicid species in the gallery forest of Brasília National Park, with an emphasis on the potential vectors of yellow fever (YF). Methods Between September 2010 and August 2011, mosquitoes were captured on the ground and in the canopy of the forest for five consecutive days per month, from nine to 15 hours. The mosquitoes were examined to verify natural infection with flaviviruses by isolation in Aedes albopictus Skuse, 1864 cells followed by indirect immunofluorescence. Results We identified 2,677 culicids distributed in 29 species. Most of the mosquitoes were captured at ground level (69%) during the rainy season (86%). The most abundant species were Sabethes (Sabethes) albiprivus Theobald, 1903; Limatus durhamii Theobald, 1901; Haemagogus (Conopostegus) leucocelaenus Dyar & Shannon, 1924; Haemagogus (Haemagogus) janthinomys Dyar, 1921; Aedes (Ochlerotatus) scapularis Rondani, 1848; Psorophora (Janthinosoma) ferox Von Humboldt, 1819; and Aedes (Ochlerotatus) serratus Theobald, 1901. Limatus durhamii, Limatus durhamii, Psorophora ferox, Aedes scapularis and Aedes serratus showed significant differences (p<0.05) in their habitat use. Limatus durhamii was found more often in the canopy, unlike the other species. During the rainy season, the most abundant species were Sa. albiprivus, Haemagogus leucocelaenus and Limatus durhamii. During the dry season, the potential YF vectors exhibited a very low frequency and abundance, except Aedes scapularis and Aedes serratus. No flavivirus was detected in the 2,677 examined mosquitoes. Conclusions We recommend continued and systematic entomological monitoring in areas vulnerable to the transmission of YF in the Federal District of Brazil.

Na sua maioria, os cultivares de arroz plantados nos Estados do Brasil-Central são de grãos extralongos; a cariopse mede acima de 7 mm de comprimento por 2,4 mm de largura. O cultivar IR8 não teve aceitação por parte do consumidor, visto apresentar tipo de grão de qualidade e aspecto inferiores. Novos cultivares IR foram introduzidos e testados comparativamente com os mais cultivados no Estado de São Paulo, que são o IAC-120 e o IAC-435. Foram avaliadas as características agronômicas e tecnológicas (avaliação sensorial) dos referidos cultivares. Considerando a sua produção relativa, os cultivares IR665-4-1-1, IR665-4-5-5, IR634-9-6-2 e IR634-32-5-3 mostraram-se superiores ao IAC-120 e ao IAC-435 em mais de 30%. Na avaliação sensorial do arroz cru, os cultivares que tiveram a preferência geral foram o IR634-32-5-3 e o IAC-435; o IR634-9-6-2 foi rejeitado ao nível de 0,1%. Para o arroz cozido, contudo, o IAC-120 e o IR665-4-5-5 foram os mais preferidos, enquanto o IR634-32-5-3 foi rejeitado ao nível de 0,1%, pela aparência geral, pelas características comestíveis e pela preferência geral, da equipe de degustação. Tomando-se por base todas as características agronômicas da planta (porte, ciclo, tamanho da cariopse e produção) e tecnológicas do arroz beneficiado (aparência geral e características comestíveis), o IR665-4-5-5 é o cultivar que mais se aproxima das exigências dos agricultores e consumidores dos estados do Brasil-Central.

The cultivars planted in the central states of Brazil, generally have extra long seeds, and the caryopsis is longer than 7 mm and wider than 2,4 mm. The IR8 cultivar is not accepted by public because it presents a type of seed of inferior quality and appearance. New IR cultivars were introduced and comparatively tested with the ones cultivated in the State of São Paulo - Brazil (IAC-120 and IAC-435). The agronomical and technological characteristics (sensorial analyses) of the tested cultivars were evaluated. Considering the relative production, IR665-4-1-1, IR665-4-5-5, IR634-9-6-2 and IR634-32-5-5 were superior to IAC-120 and IAC-435 by more than 30%. The cultivars IR634-32-5-3 and IAC-435 were the most preferred on the basis of sensorial analyses of raw rice, IR634-9-6-2 being rejected on 0.1% level. For the cooked rice the most preferred were IAC-120 and IR665-4-5-5: IR634-32-5-3 was rejected on the 0.1% level by the testing panel on general appearance, eating quality and general preference. Comparing all the agronomical characteristics (plant size, cycle, caryopsis size and production) and technological characteristics (general appearance and eating quality) of the processed and cooked rice, the IR665-4-5-5 cultivar is one that approximates most to the characteristics required by the farmers and the consumers in the Central States of Brazil.