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Symptom of bacterial bulb rot in the external scales of an onion.

A vertically cut white onion lays on a table face up beneath a ruler. The two scales just inside the most external scale appear broken down and translucent. The outer leaves of the long neck appear crispy and old. The rest of the onion looks firm and healthy. The two halves total approximately 7 inches across. Credit: Brenna J. Aegerter, UCCE San Joaquin County
Credit: Brenna J. Aegerter, UCCE San Joaquin County
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