Biologia de Frankliniella schultzei (Trybom) (Thysanoptera: Thripidae) em tomateiro

Abstract

Frankliniella schultzei (Trybom) (Thysanoptera: Thripidae) foi encontrado infestando tomate (Lycopersicon esculentum Mill.) em Porto Alegre, RS. O estudo foi conduzido em laboratório, e os tripes acondicionados em potes de acetato, cobertos com parafilme e alimentados diariamente com folíolos de tomateiro. As observações do ciclo vital foram tomadas por duas gerações consecutivas (n = 109 indivíduos). O período embrionário demorou 4,3 d; o 1º ínstar 2,5 d; o 2º ínstar 2,5 d; a pré-pupa 1,2 d; a pupa 2,1 d; a duração da fase jovem 8,3 d; a longevidade dos machos foi de 13,1 d e das fêmeas de 13,6 d; a viabilidade do 1ºínstar foi 75,5%; a do 2ºínstar 76,3%; a da pré-pupa 91,9%; a da pupa 80,0%; e a duração do ciclo total foi de 12,6 d. A reprodução foi exclusivamente por partenogênese.

Assessing abundance and distribution of an invasive thrips Frankliniella schultzei (Thysanoptera: Thripidae) in south Florida

“…Leite et al (2002) reported that F. schultzei prefers to feed on the upper leaves to middle and lower leaves of tomato plants. Similarly, Pinent & Carvalho (1998) reported on studies where they fed F. schultzei on tomato leaflets to study its biology and life cycle. Surprisingly, we did not find F. schultzei feeding on tomato leaves during the past two years in Homestead.…”

“…The only morph found in Florida during this study period was the darker form, which is also a virulent strain between the two morphs, known to transmit at least four different plant viral diseases, including Tomato Spotted Wilt Virus (TSWV) (Sakimura, 1969), Tomato Chlorotic Spot Virus (TCSV), Groundnut Ring Spot Virus (GRSV) and Chrysanthemum Stem Necrosis Virus (CSNV) (Nagata & de Avila, 2000). While the majority of Frankliniella species are considered as anthophilous, F. schultzei have been observed feeding on both tomato and apple leaves (Jacobson, 1997; Pinent & Carvalho, 1998; Leite et al ., 2002) other than flowers of its host plant (Milne et al , 1996). The small size and thigmotactic behaviour is an advantage to thrips, helping them acquire the microhabitats in the field and escape from monitoring during initial stages of infestation.…”

Chemical Composition of Essential Oil fromEucalyptus citriodoraLeaves and Insecticidal Activity AgainstMyzus persicaeandFrankliniella schultzei

“…However, these insects present a short life cycle, five to twelve days, with great potential for developing resistance to conventional insecticides 7,8 . Due to growing concerns about the environment and human health, to find methods to reduce the use of conventional synthetic insecticides is of paramount importance.…”

Insecticidal activity of citronella grass essential oil on Frankliniella schultzei and Myzus persicae

“…Because F. schultzei and M. persicae have short life cycles (PINENT; CARVALHO, 1998;CHAGAS FILHO et al, 2005), these insects have great potential to develop chemical resistance to insecticides. As a result of the emergence of resistant populations (FURIATTI;LAZZARI, 2003;LUOGEN et al, 2005;DOÐRAMACI;TINGEY, 2008), demand has increased for agricultural pest control methods that offer safety to humans, selectivity to natural enemies, biodegradability, economic viability and low environmental impact (VIEGAS, 2003).…”