Assistência de ar em barra, ângulo e volume de pulverização no controle de doenças e na produtividade da cultura do trigo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Patogenicidade de Lecanicillium lecanii (ZIMM.) Zare & GAMS ao ácaro rajado Tetranychus urticae (Acari:Tetranychidae) e sua compatibilidade a agrotóxicos e organismos biocontroladores utilizados na cultura do crisântemo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Epidemiologia e manejo da seca de ponteiro de Corymbia citriodora (Botryosphaeria ribis / Dothyorella sp. )

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Viabilidade do controle da mancha púrpura e efeitos nos aspectos físicos, químicos e biológicos do solo e na produção do alho pelos microrganismos eficazes

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ferrugem do Eucalipto: favorabilidade climática e métodos de aplicação de fungicida para controle

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Caracterização de Rhizoctonia solani Kühn, agente causal da mela da soja (Glycine max (L.) Merrill), seleção de genótipos e controle químico

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Bioprospecção de bactérias endofíticas como agentes de biocontrole da mancha de Exserohilum turcicum e como promotoras do crescimento de plantas de milho (Zea mays L.)

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Controle da mancha preta dos frutos cítricos em cultivo orgânico e convencional e do bolor verde em pós-colheita

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Avaliação de produtos químicos no controle e na indução de mecanismos bioquímicos de resistência à mancha bacteriana (Xanthomonas perforans) do tomateiro

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Análise da ação de nanopartículas de prata sobre o biofilme de espécies de Candida

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fisiologia e manejo de Corynespora cassiicola (Berk. & M. A. Curtis) C. T. Wei, causador da mancha alvo na cultura da acerola (Malpighia emarginata D. C.)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Controle de Guignardia citricarpa e Penicillium digitatum em laranja com óleos essenciais e agentes de biocontrole

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização morfológica, cultural, molecular e enzimática de isolados de Fusarium spp., de Seringueira

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Controle de doenças fúngicas e de danos por frio em pós-colheita de lima ácida Tahiti

The Tahiti lime appears very susceptible to attack by post-harvest diseases, primarily by the fungi Penicillium and Phomopsis, and also because of its high sensitivity to storage at low temperatures. In order to reduce such damage, the present study aimed to verify the efficiency of heat treatment and disinfection of pathogens in the prevention of post-harvest chilling injury of this cultivar and to compare this treatment with other products using the conventional fungicides. The heat treatments were studied with hot-water temperatures ranging between 48 and 56° C. Water at room temperature was used as a control treatment. After treatment, the fruits were kept under cold temperature at 10° C and RH 90% for about 45 days. For comparison, three other treatments were carried out simultaneously, one using imazalil, one with baking soda, and a third with sodium carbonate, these three products being applied by baths in cold water. Two groups of fruit were evaluated, one treated by immersion considering pathogens coming from the field and another by inoculation with spores of the previously isolated pathogens. For the evaluation of physical and chemical parameters of fruits, determinations were made of the skin color, texture, weight loss, size, juice yield, soluble solids, total acidity and vitamin C content. The determination of the sensitivity of the fruit to cold was made by their exposure at temperatures inducing cold damage. The design was a randomized block design with nine treatments, analyzed by the Statgraphics statistical package. Heat treatments, especially at 52° C, were shown to be more promising in the control of pathogenic fungi and cold damage, surpassing the conventional fungicides. No changes were found in the intrinsic and extrinsic parameters in relation to the application of the different treatments.

Eficiência do silicato de potássio no controle do oídio e no desenvolvimento de abobrinha de moita

The most widely standard used for powdery mildew control on cucurbitaceas is the use of resistant cultivars and systemic fungicides, even though nutrition has been an option. The supply of silicon is benefic to many vegetable species, stimulating growth, yield, photosynthesis and regulation of transpiration; besides, its deposition in the epidermis avoids the invasion of fungus, bacteria and sucking insects. The aim of this experiment was to evaluate the influence of potassium silicate on powdery mildew control, development and yield of zucchini squash, cultivar Caserta. The experiment was conducted at Universidade Estadual Paulista, in greenhouse conditions and with a randomized design, divided in four replications, 11 plants per plot and five treatments: control (water), chemical treatment with fenarimol (2.4 g a.i. 100 L-1) and potassium silicate, in doses 1.5 L ha-1; 2.0 L ha-1 and 2.5 L ha-1. We evaluated the disease severity; gas exchange (net CO2 assimilation rates, transpiration, stomatal conductance and water use efficiency); growth (leaf area ratio, relative growth rate, absolute growth rate, net assimilation rate and specific leaf mass) and yield. The results showed that the foliar application of potassium silicate and fenarimol controlled powdery mildew and had no influence on plant growth. Therefore, the potassium silicate may be used as alternative for control of fungal pathogens and reduced application of chemical products, which provides a greater environmental sustainability. However, it is necessary to be careful with high doses because it was observed that 2.5 L h-1 was harmful to fruit production and gas exchange, despite being effective in controlling powdery mildew. According to this study it is recommended using 2.0 L ha-1 for control of powdery mildew to zucchini squash, and can replace the use of fenarimol, without affecting productivity and development of plants.