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Generic Materials Search: coppers, micronutrient

4 results

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4 items found.

View the OMRI Generic Materials List Glossary in PDF format here.
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Copper
Prohibited
Crop Fertilizers and Soil Amendments, Crop Pest, Weed, and Disease Control
Synthetic
Copper products may not be used as an herbicide. See also COPPERS – FIXED. Copper micronutrient sources that are not explicitly allowed are prohibited. Copper ammonia base, copper ammonium carbonate, copper nitrate, and cuprous chloride are prohibited sources of copper used for plant nutrients. See also MICRONUTRIENTS – SYNTHETIC listings.
205.105(a), 205.601(i)(2) & 205.601(j)(6)(ii) As plant disease control… Coppers, fixed… Shall not be used as herbicides. Microunutrients—not to be used as a defoliant, herbicide, or desiccant… copper.
Copper Sulfate
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic
When used as a plant or soil amendment it may be used as a micronutrient fertilizer, but may not be used as a defoliant, herbicide, or desiccant. Soil deficiency of copper must be documented by testing. See also COPPERS – MICRONUTRIENT.
Copper Sulfate
Allowed with Restrictions
Crop Pest, Weed, and Disease Control
Synthetic
For use as an algicide in aquatic rice systems with documented need and for tadpole shrimp control in aquatic rice systems; use is not to exceed one application per field during any 24-month period. Application rates are limited to those which do not increase baseline soil test values for copper over a time frame agreed upon by the producer and accredited certifying agent. When used for plant disease control must be used in a manner that minimizes accumulation of copper in the soil. May only be used as an algicide, insecticide, or disease control if the requirements of 205.206(e) are met. When used as a plant or soil amendment it may be used as a micronutrient fertilizer, but may not be used as a defoliant, herbicide, or desiccant. Soil deficiency of copper must be documented by testing. See also COPPERS – MICRONUTRIENT.
205.601(a)(3), 205.601(e)(4), 205.601(i)(3) & 205.601(j)(6)(ii)
Coppers – micronutrient
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic
Includes basic copper sulfate, copper oxide, copper sulfate, and copper oxysulfate. May be used as a micronutrient. Soil copper deficiency must be documented by testing. May not be used as a defoliant, herbicide, or desiccant.
205.203(d)(5) & 205.601(j)(6)(ii) Micronutrients —not to be used as a defoliant, herbicide, or desiccant. Those made from nitrates or chlorides are not allowed. Soil deficiency must be documented by testing… copper.