67 documents found, page 1 of 7
Factors influencing the performance of phosphites on the control of coffee leaf...
Honorato Júnior,Jaime; Debona,Daniel; Zambolim,Laércio; Rodrigues,Fabrício ÁvilaABSTRACT This study investigated the effect of different phosphites on the control of coffee leaf rust (CLR) caused by Hemileia vastatrix, considered the major disease affecting coffee yield worldwide. Three-month-old coffee plants were sprayed with two doses each of the phosphite solutions (standar., and double), as follows: K (40% P2O5; 1.., and 3 mL∙L-1), K (30% P2O5; ., and 6 mL∙L-1), Cu (2.., and 5 mL∙L-1)...
Genomic prediction of leaf rust resistance to Arabica coffee using machine lear...
Sousa,Ithalo Coelho de; Nascimento,Moysés; Silva,Gabi Nunes; Nascimento,Ana Carolina Campana; Cruz,Cosme Damião; Silva,Fabyano Fonseca eABSTRACT Genomic selection (GS) emphasizes the simultaneous prediction of the genetic effects of thousands of scattered markers over the genome. Several statistical methodologies have been used in GS for the prediction of genetic merit. In general, such methodologies require certain assumptions about the data, such as the normality of the distribution of phenotypic values. To circumvent the non-normality of phe...
Receptor-Like Kinase (RLK) as a candidate gene conferring resistance to Hemilei...
Almeida,Dênia Pires de; Castro,Isabel Samila Lima; Mendes,Tiago Antônio de Oliveira; Alves,Danúbia Rodrigues; Barka,Geleta DugassaABSTRACT: The biotrophic fungus Hemileia vastatrix causes coffee leaf rust (CLR), one of the most devastating diseases in Coffea arabica . Coffee, like other plants, has developed effective mechanisms to recognize and respond to infections caused by pathogens. Plant resistance gene analogs (RGAs) have been identified in certain plants as candidates for resistance ( R ) genes or membrane receptors that activate ...
Molecular Structure Studies on Allyl Sulfonamides: Synthesis, Theoretical Treat...
Rabello,Anderson S; Rubinger,Mayura M. M; Souza,Rafael A. C; Guilardi,Silvana; Lima,Guilherme F. de; Tavares,Eder C; Zanon,Édipo P; Silva,Giovanna R. NTwo series of allyl sulfonamides, prepared from Morita-Baylis-Hillman adducts and primary aromatic sulfonamides, were fully characterized. The Z configuration for the products derived from 2-[hydroxy(phenyl)methyl]acrylonitrile (1) and E configuration for those derived from methyl 2-[hydroxy(phenyl)methyl]acrylate (2) were confirmed by X-ray diffraction for one compound of each series (1e, 2f). Density function...
Interaction between a biostimulant and cyazofamid in the control of clubroot of...
Irokawa,Flávio Mitsuru; Zambolim,Laércio; Parreira,Douglas FerreiraABSTRACT Clubroot of crucifers is a root disease caused by the fungus Plasmodiophora brassicae, responsible for causing more than 40% economic damage to brassica crops. This disease has led to a gradual decline in brassica production in several countries, including Brazil, where an approximate volume of 50 thousand tons are marketed every year. There are few studies involving the control of this disease, which ...
New Allyldithiocarbimates: Synthesis, Structure and Antifungal Activity against...
Vidigal,Antonio E. C.; Rubinger,Mayura M. M.; Silva,Lucas F. da; Zambolim,Laércio; Pereira,Arthur B. D.; Guilardi,Silvana; Souza,Rafael A. C.Twelve tetraphenylphosphonium allyldithiocarbimates were synthesized and fully characterized by high-resolution electrospray ionization mass spectrometry (HR-ESI-MS), infrared and nuclear magnetic resonance (NMR) spectroscopies. The spectroscopic data indicated that the allyldithiocarbimate anions present Z configuration, as confirmed by X-ray crystallography. These new compounds inhibited the germination of Ph...
Resistance of Botrytis cinerea to fungicides controlling gray mold on strawberr...
Lopes,Ueder Pedro; Zambolim,Laércio; Capobiango,Nayara Pereira; Gracia,Nicolas Arturo Osorio; Freitas-Lopes,Rejane LivramentoABSTRACT The aim of this study was to evaluate the resistance of Botrytis cinerea to the fungicides currently used for its control in Brazil. Isolates of the fungus were collected from different strawberry-producing fields in the states of Espírito Santo, Minas Gerais, and São Paulo, Brazil. First, a total of 183 isolates were identified at the species level using specific primers for the glyceraldehyde-3-phosp...
Triple plagiotropic branch in coffee: a new promising mutant?
Sakiyama,Ney Sussumu; Picoli,Edgard Augusto de Toledo; Oliveira,Antonio Carlos Baião de; Caixeta,Eveline Teixeira; Zambolim,LaércioAbstract Coffee tree is a shrub with dimorphic branches. The orthotropic stem grows vertically with two near-horizontal plagiotropic branches, per node, in opposite phyllotaxy. The consecutive nodes of the orthotropic stem are organized in parastichies. We report here mutant plants of Coffea arabica with triple plagiotropic branch, resulted from the whorled phyllotaxy of the orthotropic stem. In mutant plants t...
Identification of sources of resistance to anthracnose stalk rot in maize
Nicoli,Alessandro; Zambolim,Laércio; Costa,Rodrigo Veras da; Guimarães,Lauro José Moreira; Lanza,Fabrício Eustáquio; Silva,Dagma Dionísia daABSTRACT: Adoption of resistant cultivars is the primary measure used to control anthracnose stalk rot. The goal of this study was to identify maize-resistant genotypes to anthracnose stalk rot, which are similar to the hybrid 2B710. Experiments were performed at Embrapa Maize and Sorghum experimental fields in Brazil. The first experimental trial evaluated 234 maize lines as well as two commercials hybrids, BR...
Aplicação foliar de fungicidas e incidência de grãos ardidos e fumonisinas tota...
Lanza,Fabrício Eustáquio; Zambolim,Laércio; Costa,Rodrigo Veras da; Silva,Dagma Dionísia da; Queiroz,Valéria Aparecida Vieira; Parreira,Douglas FerreiraResumo: O objetivo deste trabalho foi avaliar a eficiência da aplicação foliar de fungicidas na redução da incidência de patógenos fúngicos, de grãos ardidos e de fumonisinas totais em grãos de milho (Zea mays). Foram conduzidos três ensaios: um no município de Luís Eduardo Magalhães, na Bahia, e dois em Sete Lagoas, em Minas Gerais, nas safras 2010/2011 e 2011/2012, com cultivo de diferentes híbridos comerciai...