Development and fitossanity on plum trees treated with silicon in organic system/ Desenvolvimento e fitossanidade de ameixeiras tratadas com silicio em sistema organico

The objective of this study was to evaluate the effect of silicon (Si) applied via foliar in plum trees cv. Pluma 7 for the control of bacterial blight (Xanthomonas arboreal pv. pruni), oriental fruit moth (Grapholita molesta) and green aphid (Myzus persicae), as well as in plant development, in org...

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Published in:Revista Brasileira de fruticultura Vol. 35; no. 4; p. 1059
Main Authors: Ferreira, Silvana Girotto Ma, Botelho, Renato Vasconcelos, Faria, Cacilda Marcia Duarte Rios, Mateus, Milena Aparecida Ferrari, Zaluski, Welton Luiz
Format: Journal Article
Language:Spanish
Published: Sociedade Brasileira de Fruticultura 01-12-2013
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Summary:The objective of this study was to evaluate the effect of silicon (Si) applied via foliar in plum trees cv. Pluma 7 for the control of bacterial blight (Xanthomonas arboreal pv. pruni), oriental fruit moth (Grapholita molesta) and green aphid (Myzus persicae), as well as in plant development, in organic management. For this trial it was used the commercial product AgriSil ® (98% Si[O.sub.2]). The experiment was carried out in Guarapuava-PR, Brazil, by two consecutive cycles (2010/2011 and 2011/2012). The doses used were 0, 1, 2, 4 and 8 g [L.sup.-1] of the commercial product, each two weeks. In both cycles, for the plum bacterial blight, it was verified until 85% incidence reduction, with quadratic effect of silicon doses. For the damage of oriental fruit moth, number of aphids, diameter and length of shoots no significant difference between the doses of Si[O.sub.2] were found. For Si leaf content, a positive linear effect was verified in function of Si doses. Keywords: Prunus salicina, mineral nutrition, Integrated Management, agroecology. O objetivo deste trabalho foi avaliar o efeito do silicio (Si) aplicado via pulverizacao foliar em ameixeiras cv. Pluma 7, para o controle da bacteriose (Xanthomonas arboricola pv. pruni), mariposa oriental (Grapholita molesta) e pulgao-verde (Myzuspersicae), bem como no desenvolvimento das plantas, em sistema organico de producao. Para o ensaio, foi utilizado o produto comercial AgriSil® (98% de Si[O.sub.2]). O experimento foi conduzido em Guarapuava-PR, durante dois ciclos consecutivos (2010/2011 e 2011/2012). As doses utilizadas foram: 0; 1; 2;4 e 8 g [L.sup.-1] do produto comercial, aplicadas quinzenalmente. Nos dois ciclos de avaliacao, foram observadas reducoes de ate 85% na incidencia da bacteriose com efeito quadratico das doses de silicio. Os danos causados pela mariposa oriental, o numero de pulgoes, o diametro e o comprimento de ramos das plantas de ameixeira nao foram significativamente influenciados pelas aplicacoes de Si[O.sub.2]. Quanto ao teor de Si foliar, observou-se efeito linear positivo em funcao das doses de Si. Termos para indexacao: Prunus salicina, nutricao mineral, manejo integrado, agroecologia.
ISSN:0100-2945