Sitobion graminis Takahashi, 1950 (Hemiptera, Aphididae): first record in Brazil, biological and morphometric parameters


Autoria(s): Cardoso,Josiane Teresinha; Lazzari,Sonia Maria Noemberg; Carvalho,Regina Célia Zonta de
Data(s)

01/03/2006

Resumo

The species Sitobion graminis Takahashi, 1950 (Hemiptera, Aphididae) was first detected in Brazil in 1998, in Curitiba, Paraná state, associated with the grass species Erianthus sp., Calamagrotis sp. and Paspalum urvilei. Both the field-collected and laboratory-reared specimens presented a noticeable intrapopulational variation in body and appendix length and in dorso-abdominal sclerotization. This species has been recorded in Malaysia, New Guinea, India, Philippines and Africa, where it colonizes several species of Poaceae. S. graminis differs from other Sitobion species from Brazil associated with grasses, as it presents black cauda and siphunculi and exhibits a constriction in the base of the last rostral segment. Biological data were obtained in the laboratory by rearing newborn nymphs on the inflorescence of the host plants. They passed through four nymphal instars. The mean duration of the nymphal stage was of 11.4 days, with a mortality ratio of 36.5%. The mean pre-larviposition period was of 1.8 days; mean longevity of the females was 25.2 days; and mean fecundity was 18.7 nymphs/female, ranging from 2 to 41 nymphs/female.

Formato

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Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262006000100017

Idioma(s)

en

Publicador

Sociedade Brasileira De Entomologia

Fonte

Revista Brasileira de Entomologia v.50 n.1 2006

Palavras-Chave #Biological aspects #grass aphids #morphometrics
Tipo

journal article