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MAYER,NEWTON ALEX; UENO,BERNARDO; SILVA,VALÉCIA ADRIANA LUCAS DA; VALGAS,RICARDO ALEXANDRE; SILVEIRA,CARLOS AUGUSTO POSSER. |
RESUMO A morte precoce do pessegueiro é uma síndrome caracterizada por um colapso das plantas ao final do período de dormência, cujas causas envolvem diversos fatores bióticos e abióticos. Objetivou-se avaliar a associação da morte precoce do pessegueiro com à fertilidade do solo. Amostraram-se a rizosfera, para análise química, sob a copa de plantas sintomáticas e assintomáticas, com idade entre dois e oito anos, em nove pomares comerciais localizados nos municípios de Pelotas e Canguçu, no Rio Grande do Sul, totalizando 108 amostras. De acordo com os resultados, a obtenção de uma função discriminante para classificar as plantas em duas categorias, como sintomáticas ou assintomáticas, não proporcionou resultado satisfatório, pois a taxa de classificação... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PH do solo nutrientes do solo síndrome Prunus spp.; Rosaceae. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452015000300773 |
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MAYER,NEWTON ALEX; UENO,BERNARDO; SILVA,VALÉCIA ADRIANA LUCAS DA; VALGAS,RICARDO ALEXANDRE; SILVEIRA,CRISTINA MOREIRA DA. |
ABSTRACT Peach Tree Short Life (PTSL) is a syndrome characterized by a plant collapse at the end of dormancy, which causes include several biotic and abiotic components. The aim of this study was to assess the C/N ratio and bark nutrients in symptomatic and asymptomatic short-life peach trees. Live tissue portions were removed from the bark of the main scaffolds of symptomatic and asymptomatic adjacent trees in nine commercial peach orchards located in Pelotas and Canguçu, state of Rio Grande do Sul, Brazil. In laboratory, carbon (C), nitrogen (N), phosphorus (P), potassium (K), calcium(Ca), magnesium (Mg), iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), boron (B) contents and C/N ratio were determined. The main component analysis of the study... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrient; Nutrition; PTSL syndrome; Prunus spp.; Rosaceae. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000400403 |
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NÖRNBERG,SANDRO DANIEL; GRÜTZMACHER,ANDERSON DIONEI; NAVA,DORI EDSON; VALGAS,RICARDO ALEXANDRE; OZELAME,ÂNGELO LUIS. |
ABSTRACT The aim of this study was to evaluate the residual effect of pesticides sprayed on peach orchards on S. zeamais. The study consisted of two experiments, according to the method of pesticide application. For Experiment I, pesticides were directly sprayed on peach trees and in Experiment II, the application of pesticides was performed under laboratory conditions. In both Experiments, the effect of pesticides was assessed in laboratory through the release of ten weevils per peach fruit. The effect of treatments was assessed by variable number of surviving insects. The results for pesticides [a.i. (ml or g.100L)] have shown that application of treatments in the field (Experiment I), malathion (200) presented persistence at 1DAT (Days after treatments... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical control; Insecticides; Persistence; Prunus persica. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000300402 |
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