Tray Reuse

scouted March 26, 2026

Scientific Name
Abiotic
Background
A tobacco greenhouse (variety NC197) was being scouted, and it was observed that 50% of the greenhouse was affected by different germination rates and slight cupping on some of the seedling leaves. A sample was submitted to the PDIC to rule out disease.
Conclusion
The issue was identified as an abiotic disorder, possibly related to tray reuse, particularly due to cleaning agents or trace chemical contaminants in the trays from previous use.
Resources
Close-up of tobacco seedling leaves with slight cupping on the leaves.
Tobacco float trays showing variety of germination rates
Tobacco float trays showing spotty growth
Tobacco float trays showing uneven growth of the plants

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