Abstract IMA 5801B2RF is a medium to short season cultivar with high fiber yield potential. The genes Bt cry1Ac and cry2Ab confer resistance to Lepidoptera and cp4-epsps confers tolerance to the herbicide glyphosate. The key feature of this new cultivar is resistance to ramularia leaf spot and root-knot nematode.
O Cerrado brasileiro é o maior produtor de algodão do Brasil devido à implantação da colheita mecanizada, à maior utilização de reguladores de crescimento e ao investimento em qualidade de fibra, proporcionando o cultivo do algodoeiro em extensas áreas. Apesar de toda essa tecnologia, a elevação nos níveis de incidência e severidade das doenças, em...
RESUMO Entre as doenças que causam manchas foliares no algodoeiro, a mancha de ramulária tem se tornado importante em ambientes tropicais, porque as condições climáticas são favoráveis para o desenvolvimento do patógeno. Objetivou-se nesse trabalho avaliar o desempenho dos fungicidas difenoconazol, trifenil hidróxido de estanho, trifloxistrobina, p...
Ramularia leaf spot, caused by Ramularia areola, is responsible for premature defoliation of cotton, resulting in potential reductions in yield. The objective of this study was to evaluate integrated control using genotypes, a fungicide and Trichoderma asperellum to manage Ramularia leaf spot on cotton. In the greenhouse, the resistance of eighteen...
ABSTRACT Cotton monoculture favors the development of diseases such as ramularia leaf spot, which causes early defoliation and boll rotting, thus decreasing yield. This study aimed at evaluating the severity of ramularia leaf spot and its effects on cotton leaf area and yield. The experiment was conducted in a triple (4 x 3 x 2) factorial design, c...
ABSTRACT The ramularia leaf spot (RLS) disease causes cotton yield losses. Choosing a less susceptible cultivar and a sowing time that are less favorable to the pathogen contribute to the management of this disease. The objective of this work was to evaluate the severity of ramularia leaf spot on cotton cultivars sowed in two different times. The e...
2015
2015
2013
Genótipos de algodoeiro, compreendendo cultivares e linhagens avançadas, foram avaliados quanto à reação à mancha de Ramularia (Ramularia areola), em experimentos de campo e sob infestação natural, aos 60; 90 e 110 dias após a emergência das plantas em Ituverava-SP, e aos 75; 100 e 120 dias em Primavera do Leste-MT. Nos dois locais a avaliação mais...
