Renata C. Monteiro

Espécies de Frankliniella (Thysanoptera: Thripidae) de importância agrícola no Brasil

Six Frankliniella species: F. brevicaulis Hood, F. condei John, F. occidentalis (Pergande), F. schultzei (Trybom), F. williamsi Hood and F. zucchini Nakahara & Monteiro are pests in Brazil, three of them are virus-vector. A key to distinguish these species is provided, as well as their morphological characterization.

Diversity and Hosts of Trichogramma in the New World, with Emphasis in South America

The diversity and hosts of Trichogramma in the New World, with emphasis in South America, is presented. All the 94 Trichogramma species recorded in the Americas and their habitats were listed. Sixty species are recorded in North America, 22 in Central America and 41 in South America. Also, a list of the South American species with their respective host insects, distribution and associated plants was updated. In South America, Brazil is the country with the highest number of native species known. Trichogramma species are mainly associated to lepidopterous economically important, mostly in the family Noctuidae.

Espécies de Thrips (Thysanoptera: Thripidae) no Brasil

Four Thrips species: T. australis, T. palmi, T. simplex e T. tabaci are recorded in Brazil. Three of them are crop pests and T. australis is commonly associated to Eucalyptus spp. flowers. Besides being polyphagous, T. palmi and T. tabaci are also virus-vector. A key to distinguish these species is provided, as well as their characterization.

Thrips species (Insecta: Thysanoptera) associated to Fabaceae of agricultural importance in Cerrado and Amazon-Caatinga ecotone from Brazilian Mid-North

Little is known about the Thysanoptera fauna from Brazilian Mid-North. In spite of being a region with at least three biomes and some ecotones, the studies on this insect order in the region are related to associations to a few cultivated plant species. On Fabaceae, plant family with the second largest number of records of thrips species associated in Brazil and huge economic importance for Mid-North, there are thrips records only on cowpea (Vigna unguiculata (L.) Walp.). Due to the lack of knowledge on the Thysanoptera fauna in such a diverse area and the importance of crops of this family in the region, this research aimed to survey the thrips species associated to Fabaceae of agricultural importance in areas of Cerrado and Amazon-Caatinga ecotone in Brazilian Mid-North, as well as provide basic biological information about damage and hosts. Also, comparison between the Thysanoptera fauna of fabaceous crops in the region and the rest of the Country and a key to species are presented. Thrips were collected on six fabaceous crops in four municipalities in the state of Maranhao and in one municipality in the state of Piaui. Eight thrips species were identified: Caliothrips phaseoli (Pergande, 1895), Frankliniella brevicaulis Hood, 1937, F. gardeniae Moulton, 1948, F. insularis (Franklin, 1908), F. schultzei (Trybom, 1910), F. tritici (Fitch, 1855), Haplothrips gowdeyi (Franklin, 1908) and Salpingothrips minimus Hood, 1935. Two other unidentified species were collected: Plesiothrips sp. and Scolothrips sp. Except for F. schultzei, the thrips species surveyed in Maranhao are first records in the state, and F. gardeniae is first record in the state of Piaui. The first records of thrips on Phaseolus lunatus L. in Brazil were established. Some species known as pests of Fabaceae mostly in southern and southeastern Brazil were not found in Mid-North. Voucher-specimens are deposited at the Entomological Collection of the Department of Entomology and Acarology, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de Sao Paulo (ESALQ/USP).

Neohydatothrips samayunkur (Kudô) (Thysanoptera: Thripidae) infesting marigold (Tagetes patula, Compositae) in Brazil

Neohydatothrips samayunkur (Kudo) (Thysanoptera: Thripidae) e registrado pela primeira vez no Brasil em cravo-de-defunto (Tagetes patula: Compositae), no Estado do Parana. Os danos causados a planta, os sintomas de ataque e os hospedeiros conhecidos, assim como a caracterizacao dessa especie de tripes sao relatados.

Thrips tabaci Lind.: é realmente uma praga do algodoeiro no Brasil?

The occurence of Thrips tabaci Lind. on cotton (Gossypium hirsutum L.) was investigated. In the Brazilian literature T. tabaci has been mentioned as a common early season phytophagous pest of cotton. However, there are no references to collections (voucher specimens) or to identification methods that can clarify these records. In contrast, among many samples of thrips collected between 1992 and 1996 (mostly in 1995) on cotton, in 30 counties from five states and four geographic regions, not a single specimen was found. If T. tabaci occurs commonly on this crop in Brazil, even at relatively low populations, then at least some individuals should have been collected in this survey. Most of the thrips specimens taken from cotton were Frankliniella schultzei (Trybom), although Caliothrips phaseoli (Hood) and unidentified Frankliniella spp. were also found in low numbers in few samples.

Ocorrência de Frankliniella schultzei (trybom) (thysanoptera: thripidae) em plantas daninhas

A monitoring of weeds was carried out on the UNESP Campus in Jaboticabal, SP, with the objective of indentifying host weed species of Frankliniella schultzei (Trybom). The plants were collected weekly and transported to the laboratory inside paper bags. The Berlese funnel method was used to separate the insects from the plants. Thrips were found in 19 of the 43 weed species studied: Raphanus sativus L., R. raphanistrum L., and Sinapsis arvensis L. presented the highest percentage of thrips, consisting of 45, 27, and 17% respectively of the total females that were collected.