Results 31 to 40 of about 6,379 (176)

Incidência de viroses e enfezamentos e estimativa de perdas causadas por molicutes em milho no Paraná [PDF]

Pesquisa Agropecuária Brasileira, 2003
O objetivo deste trabalho foi avaliar a incidência de viroses e enfezamentos e estimar as perdas causadas por enfezamentos na cultura do milho safrinha. Os diagnósticos baseados em sintomas foram confirmados por PCR ou RTPCR.
Elizabeth de Oliveira, Renato de Oliveira Resende, María de la Paz Giménez Pecci, Irma Graciela Laguna, Patricia Herrera, Ivan Cruz   +5 more
doaj   +1 more source

Bioecology of Spodoptera frugiperda (JE Smith, 1757) in different cover crops

Bioscience Journal, 2016
The objective of this work was to evaluate the biological variables of Spodoptera frugiperda on species of cover crops. The experiments were conducted in laboratory and greenhouse using the following species: sunflower (Helianthus annuus), sun hemp ...
Aline Silvia Dias, Rosangela Cristina Marucci, Simone Martins Mendes, Silvino Guimarães Moreira, Octávio Gabriel Araújo, Christiane Almeida dos Santos, Tatiane Aparecida Barbosa   +6 more
doaj   +3 more sources

Herbicide efficacy on Borreria densiflora control in pre- and post-emergence conditions [PDF]

Planta Daninha, 2014
The weed Borreria densiflora is a management issue in soybean and sugarcane crops from North and Northeastern Brazil. Knowledge upon chemical control of B.
B.A.B. Martins, P.J. Christoffoleti
doaj   +1 more source

Plant growth‐ promoting bacteria inoculation and co‐inoculation effects on Palisade grass (Urochloa brizantha cv. Marandu) in ferralsol in Amazonas State, Brazil

Soil Science Society of America Journal, Volume 90, Issue 4, July/August 2026.
Abstract Deforestation is primarily driven by three main factors the conversion of the Amazon rainforest into pastureland, agriculture, and mining, as well as land invasion. These pastures are mostly degraded, and it is necessary to restore their productive capacity. Microbial inoculants can be used to increase nutrient use efficiency. The objective of
Sara Rodrigues Batista, Cláudia Majolo, Rogério Perin, Marco Antonio Nogueira, Mariangela Hungria, Christiane Abreu Oliveira‐Paiva, Enílson Luíz Saccol de Sá, Christoph Müller, Maria Teresa Gomes Lopes, Aleksander Westphal Muniz   +9 more
wiley   +1 more source

A procedure for maize genotypes discrimination to drought by chlorophyll fluorescence imaging rapid light curves

Plant Methods, 2017
Background Photosynthesis can be roughly separated into biochemical and photochemical processes. Both are affected by drought and can be assessed by non-invasive standard methods.
Carlos Antônio Ferreira de Sousa, Dayane Silva de Paiva, Raphael Augusto das Chagas Noqueli Casari, Nelson Geraldo de Oliveira, Hugo Bruno Correa Molinari, Adilson Kenji Kobayashi, Paulo Cesar Magalhães, Reinaldo Lúcio Gomide, Manoel Teixeira Souza   +8 more
doaj   +1 more source

Características fisiológicas de biótipos de Conyza bonariensis Resistentes ao glyphosate cultivados sob competição [PDF]

Planta Daninha, 2013
A resistência de plantas daninhas a herbicidas está relacionada a modificações metabólicas, enzimáticas, fisiológicas e/ou anatômicas. Aliado a essas mudanças, a planta pode aumentar ou diminuir as atividades fisiológicas, o que, consequentemente, pode ...
L. Galon, E.A. Ferreira, G. Concenço, A.A. Silva, D.V. Silva, A.F. Silva, I Aspiazú, L. Vargas   +7 more
doaj   +1 more source

Efeito de diferentes arranjos no consórcio milho-feijão e milho-caupi no Acre, Brasil [PDF]

Acta Amazonica, 2000
Visando estudar um sistema de cultivo para o consórcio do milho (Zea mays L.) com feijão (Phaseolus vulgaris L.) e milho com o caupi (Vigna unguiculata (L.) Walp), foram conduzidos experimentos durante os anos de 1995 e 1996, em Rio Branco, Acre. Quatro diferentes arranjos (uma, três, cinco e sete fileiras de feijão ou caupi para uma fileira de milho ...
COSTA, João Gomes da, MARINHO, José Tadeu de Souza   +1 more
openaire   +4 more sources

Agronomic Traits, Physiological Parameters, Chemical Composition, and In Vitro Digestibility of Urochloa Brizantha Cv. Piatã, Megathyrsus Maximus Cv. Zuri and Megathyrsus Maximus Cv. Tamani in Silvopastoral Systems

New Zealand Journal of Agricultural Research, Volume 69, Issue 2, April 2026.
Urochloa species are widely used in silvopastoral systems (SPS), but production losses highlight the need for more productive forages. This study evaluated agronomic, physiological, chemical composition, and in vitro digestibility responses of Urochloa brizantha cv. Piatã and Megathyrsus maximus cvs.
Alan Figueiredo de Oliveira, Walther Malta Coutinho Rezende Pereira, Miguel Marques Gontijo Neto, Tiago Vilas‐Boas, Felipe Della Torre, Elaine Cristina Teixeira, Edilane Aparecida da Silva, Pedro Drummond Rodrigues, Ângela Maria Quintão Lana   +8 more
wiley   +1 more source

Partitioning between primary and secondary metabolism of carbon allocated to roots in four maize genotypes under water deficit and its effects on productivity

Crop Journal, 2015
Plants may respond to drought by altering biomass allocation to shoots and roots or by changing the metabolic activities in these organs. To determine how drought changes the partitioning of carbon allocated to growth and secondary metabolism in maize ...
Alyne Oliveira Lavinsky, Paulo César Magalhães , Roniel Geraldo Ávila, Mariana Melo Diniz, Thiago Corrêa de Souza   +4 more
doaj   +1 more source

Randomised, Double‐Blinded, Placebo‐Controlled Challenge Test With Single Food Items in Dogs With Atopic Dermatitis and Adverse Food Reactions

Veterinary Dermatology, Volume 37, Issue 2, Page 247-256, April 2026.
ABSTRACT Background Identification of offending foods in dogs with adverse food reactions is usually based on “deterioration” during open food challenges. Objectives To examine the placebo effect during double‐blinded, placebo‐controlled food challenges using a predefined set of criteria for relapse.
Evi I. Sofou, Elisa Samuel, Svetlina Aleksandrova, Manolis Chatzis, Manolis N. Saridomichelakis   +4 more
wiley   +1 more source