02233naa a2200265 a 450000100080000000500110000800800410001902200140006010000210007424500940009526000090018952015130019865000160171165000150172765000220174265000110176465000280177565000150180365000150181865300150183370000230184870000200187170000170189177300590190820032592014-12-19       2014    bl uuuu     u00u1 u    #d  a2177-34911 aCAMPOS, S. de C.  aChemical treatment of papaya seeds aiming at long-term storage and control of damping off  c2014  aDamping off is a nursery disease of great economic importance in papaya and seed treatment may be an effective measure to control. The aim of this work was to evaluate the quality of papaya seeds treated with fungicides and stored under two environmental and packaging conditions. Additionally, the efficiency of fungicide treatments in the control of damping-off caused by Rhizoctonia solani was evaluated. Papaya seeds were treated with the fungicides Captan, Tolylfluanid and the mixture Tolylfluanid + Captan (all commercial wettable powder formulations). Seeds of the control group were not treated. The seeds were stored for nine months in two conditions: packed in aluminum coated paper and kept at 7 ± 1°C and in permeable kraft paper and kept in non-controlled environment. At the beginning of the storage and every three months the seed quality (germination and vigor tests), emergence rate index, height, dry mass and damping of plants in pre and post-emergence (in contaminated substrate and mycelia-free substrate) were analyzed. Both storage conditions as well as the fungicide treatments preserved the germination and seed vigor. In the infested substrate, seedling emergence was favored by fungicides, but in post-emergence, fungicides alone did not control the damping off caused by R. solani. Symptoms of damping off were not observed in the clean substrate. The results showed that the fungicide treatments may be used to pretreat papaya seed for long-term storage and commercialization.  aDamping off  aFungicides  aDoença de planta  aMamão  aThanatephorus Cucumeris  aTombamento  aTratamento  aFungicidas1 aSILVEIRA, S. F. da1 aSILVA, R. F. da1 aVIANA, A. P.  tRevista Ceresgv. 61, n. 3, p. 384-391, mai/jun., 2014