Thrips species (Thysanoptera, Terebrantia) inhabiting irrigated rice and surrounding habitats in Cachoeirinha, state of Rio Grande do Sul, Brazil

Revista Brasileira de Entomologia

Adriano Cavalleri¹  Milton De Souza Mendonça Jr¹  Everton Nei Lopes Rodrigues¹ 

[1] ,Universidade Federal do Rio Grande do Sul Instituto de Biologia Departamento de EcologiaPorto Alegre RS ,Brazil

关键词: Entomology;    Frankliniella;    inventories;    Oryza sativa;    phytophagous insects;    Entomologia;    Frankliniella;    insetos fitófagos;    inventários;    Oryza sativa;   

DOI  :  10.1590/S0085-56262010000300023

来源: SciELO

【 摘 要 】

In Brazil, almost nothing is known about the thrips fauna associated with rice crops. This is especially true for Rio Grande do Sul State (RS), the major rice producer in Brazil, where no systematic surveys have been conducted. Thus, this work records preliminarily the species of suborder Terebrantia inhabitanting irrigated rice (RC) and three nearby habitats: the area selected for rice, before cultivation (BR), grassland (GR) and forest border (FB) in Cachoeirinha, RS (50º58'21"W; 29º55'30"S). Eight field trips were carried out between October/2004 and February/2005 to Estação Experimental do Arroz in Cachoeirinha. Thrips specimens were collected with sweeping net and transported to laboratory for identification. A total of 623 adults terebrantians were recorded, belonging to two families and 18 species. Frankliniella rodeos (55.5%), Neohydatothrips cf. paraensis (30.3%) and Frankliniella schultzei (5.6%), were the most abundant, comprising more than 90% of the individuals. FB showed the highest species richness (S=15), followed by GR (S=10), RC (S=9) and BR (S=6). FB presented a low number of individuals (14.0%), contrasting with GR (44.8%) and BR (36.7%). In general, thrips abundance in RC was low at EEA (4.5%), and few species seems to effectively use rice as a host-plant. Two species previously considered of economic importance were found, F. rodeos and F. schultzei, the latter a new record for rice in Brazil. Five species are new records to RS.

【 授权许可】

CC BY-NC-ND   
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