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| Bacci,Leandro; Picanço,Marcelo C.; Moura,Marcelo F.; Semeão,Altair A.; Fernandes,Flávio L.; Morais,Elisangela G.F.. |
| This work determines the best technique, sampling unit and the number of samples to compose a sampling plan for Frankliniella schultzei (Trybom) and Thrips palmi (Karny) (Thysanoptera: Thripidae) on cucumber. The efficacy of three sampling techniques: leaf beating on a plastic tray, direct counting of insects on the lower leaf surface, and whole leaf collection in bags were compared in nine commercial cucumber crops using three sampling units (a leaf from a branch located in the apical, median or basal third of the canopy). The number of samples was determined based on the relative variance and the economic precision for the best technique and sampling unit. The direct counting of insects on the apical third of the plant canopy was the best sampling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis sativus; Frankliniella schultzei; Thrips palmi; Decision-making; Negative binomial distribution. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000500014 |
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| Sosa-Gómez,Daniel R.; Specht,Alexandre; Paula-Moraes,Silvana V.; Lopes-Lima,Adilson; Yano,Silvia A.C.; Micheli,Adriana; Morais,Elisangela G.F.; Gallo,Paulo; Pereira,Paulo R.V.S.; Salvadori,José R.; Botton,Marcos; Zenker,Maurício M.; Azevedo-Filho,Wilson S.. |
| ABSTRACT This study presents registers of Helicoverpa armigera (Hübner) occurrence to assess its spatial and temporal distribution in Brazil. We used data from collections, especially from the Southern Region, systematic collections in Rio Grande do Sul, occasional collections of caterpillars and adults in different regions of Brazil, as well as literature registers. We conclude that the introduction of H. armigera in Brazil probably occurred before October 2008. We also register that in August 2012 H. armigera was already present from the extreme southern part (Rio Grande do Sul) to the extreme northern part (Amapá) of Brazil. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Old World bollworm; Polyphagous caterpillar; Geographical distribution. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000100101 |
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