01864naa a2200301 a 450000100080000000500110000800800410001910000280006024501440008826000090023250000870024152009030032865000230123165000200125465000120127465000240128665000120131065000140132265000100133665300270134670000190137370000230139270000190141570000230143470000230145770000190148077300630149911540542018-10-16       2004    bl uuuu     u00u1 u    #d1 aTAVARES, S. C. C. de H.  aAlternative control to powdery mildew (Erysiphe poligoni d.c. Sin) on mango in Submedio São Francisco river in brazilian Semi-arid region.  c2004  aEdição do Proceedings of the 7 International Mango Symposium, Recife, sep. 2002.  aThe experimental area was installed in a commercial orchard in Nilo Coelho, Petrolina,Brazil to evaluate the efficiency of chemical and biological agents in the controlof Erysiphe polygoni D. C. Sin., causal agent of powdery mildew in mango Tommy Atkins trees. The study was conducted in the second semester of 2001, under 22°C to 30°C, and 45 to 82 RH. Nine treatments were evaluated: seven chemical compounds, a biological agent formulation, and an absolute control. The formulation DE 975 + Fenarimol was applied at the beginning of flower developrnent. Its efficiency was compared to a single application and 4 ten day interval applications of an standard product (Folicur 200 CE - 100ml/l00L of water. Theresults showed that the treatment - DE 975 + Fenarimol 50ml/150L of water, wasthe rnost efficient for the control of powdery mildew reaching 0% of infection in wholecycle of the culture.  aBiological control  aDisease control  aMangoes  aControle biológico  aDoença  aFungicida  aManga  aVale do São Francisco1 aCRUZ, S. C. da1 aSIQUEIRA, J. G. de1 aLIMA, M. L. C.1 aSILVA, P. C. G. C.1 aNEVES, R. A. F. de1 aMENEZES, C. A.  tActa Horticulturae, Leuvengn. 645, p. 471-473, feb. 2004.