02110naa a2200193 a 450000100080000000500110000800800410001910000210006024501080008126000090018952014510019865300210164965300170167065300190168770000240170670000160173070000170174677301530176311252632016-08-08       2016    bl uuuu     u00u1 u    #d1 aPERUCH, L. A. M.  aBASES FOR THE APPLICATION OF DEFOLIATION AND SURGERY TO CONTROL YELLOW SIGATOKA.h[electronic resource]  c2016  aYellow Sigatoka caused by Mycosphaerella musicola is still an important foliar disease of banana in the subtropics. The removal of diseased leaves is an important method for sigatoka control, but detailed information is needed to decide when defoliation or surgery should be applicable. This study aimed to evaluate the effect of the removal of diseased tissue on the growth of Sigatoka in banana leaves. Treatments were formed with leaves in different degrees of initial disease severity (0,1,5,15,33%) with or without surgery. Disease evaluation was performed in weekly intervals using the Stover scale adapted by Gauhl. Data were transformed to the area under disease progress curve (AUDPC) and submitted to the regression analysis and F test (P&lt5%). The experiment adopted a completely randomized design in a factorial scheme with 10 treatments and five replications in two subsequent years. The surgery practice resulted in an average reduction of 16-18% of AUDPC in both years. Better control with surgery was achieved in smaller initial severities (IS), except when IS was 0%. This results indicates that clean leafs should not be submitted to surgery in a preventive way. The AUDPC was also significantly correlated with IS, so AUCPD growths with IS.Results indicated that defoliation should be applied with &gt33% severities. The leaf removal is a valid practice for reducing the severity of Sigatoka. Sponsor: Acafruta e Finep/ Fapesc  acultural control  aleaf removal  aMycosphaerella1 aRODRIGUES, J. A. V.1 aS??NEGO, M.1 aSILVA, F. A.  tIn: INTERNATIONAL BANANA CONGRESS, 5., INTERNATIONAL MEETING, 21., 2016, Miami - Florida. Abstracts... Miami, Florida: CORBANA / ACORBAT, 2016. p. 2