Ocorrência de sirfídeos afidófagos (Diptera, Syrphidae) em Lavras, MG Occurrence of aphidophagous syrphids (Diptera, Syrphidae) in Lavras, MG

• Main Authors: Alexander Machado Auad, Raphael Trevizani
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Entomologia 2005-09-01
• Series: Revista Brasileira de Entomologia
• Subjects: Insecta; predadores; levantamento; sirfídeos; predator; survey; syrphids
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262005000300013

A ocorrência de sirfídeos afidófagos nas culturas de citros, couve, pepino, trigo e batata foi registrada. As amostragens foram realizadas, quinzenalmente, de agosto a dezembro de 2002. Constatou-se as espécies:Ocyptamus gastrostactus (Wiedemann, 1830), Allograpta exotica (Wiedemann, 1830), Pseudodorus clavatus (Fabricius, 1794) e Ocyptamus anthiphates (Walker, 1849). P. clavatus ocorreu em todas as culturas amostradas, com a maior densidade populacional (72%), seguido de O. gastrostactus (16%), A. exotica (11%) e O. anthiphates (1%). A ocorrência dos sirfídeos esteve correlacionada com os fatores climáticos e a presença dos afídeos.<br>The occurrence of aphidophagous syrphids was studied on citrus, cabbage, cucumber, wheat and potato crops. Samplings were done every 15 days from August to December 2002. The species recorded were: Ocyptamus gastrostactus (Wiedemann, 1830), Allograpta exotica (Wiedemann, 1830), Pseudodorus clavatus (Fabricius, 1794) and Ocyptamus anthiphates (Walker, 1849). P. clavatus occurred on all the crops and showed the highest population density (72%). It was followed by O. gastrostactus (16%), A. exotica (11%) and O. anthiphates (1%). The occurrence of the syrphids was correlated with the weather conditions and the presence of aphids.