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Bacterial burning is a widespread disease in soybeans, which occurs most frequently under cold and wet climate. Soybean mosaic potyvirus is spread everywhere in the world wide as the most damaging viral phytopathogens soybeans. Fusarium species can infect plants at any stage of soybean development. The objective of this research was to estimate the degree of attack of Soybean mosaic potyvirus , bacterial burn and Fusarium species in soybeans. The goal was to have the necessary information in making decisions applying for phytosanitary treatments. Three cultivars were tested: PR92M22, PR92B63, PR91M10, and observations were made under natural contamination on the 15th of July and August 30, 2013. In order to know the health of the experimental lot phytosanitary control were carried in R1 and R4 growth stages, specifying the frequency and intensity of the detected pathogens attack. The research was conducted in the experimental fields without irrigation, in Unirea city and in the Great Island, county of BrAƒila. From this paper it can be concluded that one of the main limiting factors in soybean crop is found in a very large extent of the phytosanitary nature, like the attack of the Soybean mosaic potyvirus , bacteria Pseudomonas savastanoi pv. glycinea and Fusarium species. The degree of infection varied from one cultivar to another. The study was developed during the proces of doctoral studies.

Research on the Reaction of Soybean Cultivars to Diseases Attack in 2013, in the County of Brăila