Growth, production and quality of pineapple in response to herbicide use/Crescimento, producao e qualidade do abacaxizeiro em resposta ao uso de herbicidas

In pineapple fields, weed competition is exacerbated by the fact that the crop is small and has a very slow vegetative development. The objective of this study was to determine the effects of herbicides on growth, yield and quality of pineapple, cultivar 'Perola'. The experimental design w...

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Published inRevista Brasileira de fruticultura Vol. 34; no. 3; p. 799
Main Authors Maia, Leonardo Carvalho Brant, Maia, Victor Ma, Lima, Mario Henrique Melo E, Aspiazu, Ignacio, Pegoraro, Rodinei Facco
Format Journal Article
LanguageSpanish
Published Sociedade Brasileira de Fruticultura 01.09.2012
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Summary:In pineapple fields, weed competition is exacerbated by the fact that the crop is small and has a very slow vegetative development. The objective of this study was to determine the effects of herbicides on growth, yield and quality of pineapple, cultivar 'Perola'. The experimental design was in randomized blocks with four treatments and four replications. Treatments consisted of weeding by hoe and the herbicides diuron; fluazifop-p-butyl and atrazine + S-metolachlor applied in post-emergence. The characteristics evaluated monthly during the vegetative stage were stem diameter, D-leaf length, number of leaves, number of emitted leaves and percentage of natural floral induction. In the reproductive phase, evaluations were made of average fruit weight (g) with and without crown, fruits length and diameter, number of slip, slip-sucker and sucker type seedlings, determination of soluble solids and pH in the pulp. There was no effect of herbicide treatment on the vegetative growth characteristics. Stem diameter increased until 330 days after planting, showing a decrease after this period. The D-leaf grew over time in all treatments, although phototoxicity symptoms were observed after the first application of herbicides. The traits evaluated on the reproductive phase showed no significant differences in response to treatments. Therefore, the use of diuron fluazifop-p-butyl and atrazine + S-metolachlor did not affect growth, yield and fruit quality of pineapple, cultivar 'Perola'. Index terms: Ananas comosus var. comosus, weeds, herbicides, 'Perola'. No cultivo do abacaxizeiro, a competicao com plantas daninhas e agravada pelo fato de a cultura apresentar pequeno porte e ter o desenvolvimento vegetativo muito lento. O objetivo do trabalho foi determinar os efeitos de herbicidas sobre o crescimento, a produtividade e a qualidade do abacaxizeiro 'Perola'. O delineamento experimental foi em blocos casualizados com quatro tratamentos e quatro repeticoes. Os tratamentos foram constituidos de capina manual atraves de enxada e herbicidas diuron, fluazifpo-Pbutilico e Atrazina + S-Metalacloro em pos-emergencia. As caracteristicas avaliadas mensalmente na fase vegetativa foram diametro do talo, comprimento da folha "D", numero de folhas, numero de folhas emitidas e porcentagem de inducao floral natural. Na fase reprodutiva, foram avaliados peso medio dos frutos (g) com e sem coroa, comprimento e diametro dos frutos, numero de mudas do tipo filhote, filhote-rebentao e rebentao, determinacao dos solidos soluveis e ph da polpa. Nao houve efeito dos tratamentos de aplicacao de herbicidas sobre as caracteristicas de crescimento vegetativo. O diametro do talo apresentou aumento ate 330 dias apos o plantio, evidenciando diminuicao apos esta epoca. A folha "D" apresentou crescimento ao longo do tempo em todos os tratamentos embora tenham sido observados sintomas de fitotoxidez apos a primeira aplicacao dos herbicidas. As caracteristicas avaliadas da fase reprodutiva nao apresentaram diferenca significativa em resposta aos tratamentos utilizados. Portanto, o uso de diuron, fluazifpo-P-butilico e Atrazina + S-Metolacloro nao influenciaram o crescimento, a producao e a qualidade dos frutos do abacaxizeiro cultivar Perola. Termos de Indexacao: Ananas comosus var. comosus, plantas daninhas, herbicidas, Perola.
ISSN:0100-2945