Generic Materials Search: plant protectants nonsynthetic

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View the OMRI Generic Materials List Glossary in PDF format here.
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Plant Protectants – nonsynthetic
Crop Management Tools and Production Aids
Materials that protect plants from harsh environmental conditions such as frost and sunburn, or from infection, or the build-up of dirt on leaf surfaces, or injury by a pest. Nonsynthetic substances are allowed including diatomaceous earth, pine oil, pine resin, and yucca.