Some spikelets on the ear of rice are degraded or poorly fertilized, and cannot be grouted and sturdy, and the glume often becomes brown. No matter what kind of measures are taken by these splendid flowers, they will not be able to restore grouting. Infection with phytotoxicity and saprophytic bacteria will also make the glume of rice brown, and grain filling is generally not affected. When saprophytic bacteria are severe, sterilization can be considered by spraying. Applicable drugs include prochloraz, thiophanate-methyl, and basic copper sulfate (copper noble).
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