Gonçalves, Paulo Antonio de Souza and Vieira Neto, João (2011) Influência da incidência de tripes, Thrips tabaci Lind. (Thysanoptera: Thripidae) na produtividade de cebola em sistemas convencional e orgânico. [The influence of thrips incidence, Thrips tabaci Lind. (Thysanoptera: Thripidae) and the yield in onion on conventional and organic system.] Revista Brasileira de Agroecologia, 6 (2), pp. 152-158.
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Document available online at: http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/article/view/9994/pdf
Summary
O objetivo deste trabalho foi verificar a influência da incidência de tripes na produtividade de cebola em sistemas orgânico e convencional. O estudo foi baseado no levantamento do histórico de parcelas onde não se utilizou nenhum método de controle em 10 e 17 experimentos, respectivamente, em sistemas convencional (período de 1991 a 1997) e orgânico (2004 a 2009), na Epagri, Estação Experimental de Ituporanga, SC. A cultivar de cebola utilizada foi a Crioula. Em sistema convencional a relação entre a incidência de ninfas de tripes com a produtividade foi negativa, y= -0,03x2 + 0,796X + 10,06 (R2= 0,80). Em sistema orgânico houve efeito linear e positivo para as variáveis: produtividade total, y= 0,365x + 9,93 (R2= 0,27), peso de bulbo geral, y= 1,264x + 52,12 (R2= 0,136), peso de bulbo comercial, y= 0,809x + 88,49 (R2= 0,145), e produtividade comercial, y= 0,827x + 6,634 (R2= 0,253). Os dois sistemas diferiram principalmente pelas práticas de manejo do solo. Em manejo orgânico, foram adotadas práticas ecológicas, como plantio direto, plantas de cobertura, adubos orgânicos e fosfato natural.
Summary translation
The objective this research was to evaluate the influence of the thrips incidence in yield of onion in organic and conventional systems. The study was based in the historical survey in plots without control methods in 10 and 17 experiments, respectively in conventional (from 1991 to 1997), and organic (from 2004 to 2009) systems, in the Epagri, Ituporanga Experiment Station, Santa Catarina State, Brazil. The cultivar used was the Crioula. In conventional system the relationship between nymph thrips incidence with yield was negative, y= -0,03x2 + 0,796X + 10,06 (R2= 0,80). In organic system the relationship between insect was linear and positive to variables, total yield, y= 0,365x + 9,93 (R2= 0,27), bulb weight general, y= 1,264x + 52,12 (R2= 0,136), weight of bulb commercial, y= 0,809x + 88,49 (R2= 0,145), and commercial weight, y= 0,827x + 6,634 (R2= 0,253). The both systems differed mainly by soil management practices. In organic system ecological practices were adopted, such as no tillage, cover crops, organic fertilizers and rock phosphate.
| EPrint Type: | Journal paper |
|---|---|
| Keywords: | Allium cepa, Agroecologia, Agricultura orgânica, Produtividade, Inseto. Allium cepa, Thrips , Agroecology, Organic agriculture, Yield, Insect. |
| Agrovoc keywords: | Language Value URI English Onions http://aims.fao.org/aos/agrovoc/c_12934 English Allium cepa http://aims.fao.org/aos/agrovoc/c_281 English Thrips tabaci http://aims.fao.org/aos/agrovoc/c_30396 English Organic agriculture http://aims.fao.org/aos/agrovoc/c_15911 English Yields http://aims.fao.org/aos/agrovoc/c_8488 English Thripidae http://aims.fao.org/aos/agrovoc/c_30390 |
| Subjects: | Crop husbandry > Production systems Farming Systems Crop husbandry > Production systems > Cereals, pulses and oilseeds |
| Research affiliation: | Brazil > Other organizations |
| ISSN: | 1980-9735 |
| Related Links: | http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/index |
| Deposited By: | Pinto, Gabriela Franco |
| ID Code: | 23088 |
| Deposited On: | 10 Sep 2013 17:51 |
| Last Modified: | 10 Sep 2013 17:51 |
| Document Language: | Portuguese/Portugues |
| Status: | Published |
| Refereed: | Peer-reviewed and accepted |
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