02184naa a2200289 a 450000100080000000500110000800800410001910000230006024501340008326000090021750001270022652012330035365000160158665000170160265000230161965300200164265300240166265300170168670000180170370000170172170000170173870000200175570000150177570000200179070000230181077300610183321150682019-11-25       2019    bl uuuu     u00u1 u    #d1 aOLIVEIRA, L. M. de  aOccurrence of panicle blast in and grain quality of irrigated rice fertilized with nitrogen and silicates.h[electronic resource]  c2019  aTítulo em português: Ocorrência de brusone e qualidade de grãos em arroz irrigado adubado com nitrogênio e silicatos.  aThe objective of this work was to evaluate the effects of fertilization with nitrogen topdressing and silicates, as well as of the use of fungicides, on the occurrence of panicle blast, milling yield, and whole grains, vitreous grains, and chalky kernels in an irrigated rice cultivar sensitive to the disease. Two experiments were conducted in a randomized complete block design, in a 4×4×2 factorial arrangement, with four replicates: in experiment 1, four doses of nitrogen × four doses of calcium and magnesium silicate on soil × with and without fungicides; and, in experiment 2, four doses of nitrogen × four doses of potassium silicate applied on leaves x with and without fungicides. At the doses above 60 kg ha-1 nitrogen without fungicides, there was an increase in panicle blast severity, a decrease in the percentage of whole and vitreous grains, and an increase in chalky kernels and chalky area. The greatest effects of silicates occurred without fungicides. Fungicide use reduced the severity of blast in the panicles. Milling yield ranged from 60 to 70% in both experiments. The control of blast with fungicides maintains high rice grain quality, milling yield, and percentages of whole and vitreous grains.  aGrain yield  aOryza Sativa  aPyricularia Oryzae  aGrãos inteiros  aRendimento do grão  aWhole grains1 aMARCHESAN, E.1 aDAVID, R. de1 aWERLE, I. S.1 aARAMBURU, B. B.1 aDONATO, G.1 aSILVA, A. L. da1 aCOSTA, I. F. D. da  tPesquisa Agropecuária Brasileiragv. 59, e00295, 2019 .