Organic (NOP)
Not on the National ListIs Trichoderma harzianum allowed in USDA organic crop production?
Source: USDA National List, 7 CFR 205.601 and 205.602
Not on the National List
Is Trichoderma harzianum on the organic National List? No.
USDA National List, 7 CFR 205.601 and 205.602 · Checked Oct 29, 2026
What this means
Trichoderma harzianum isn't on the National List under any name we hold for it. The list names the synthetic substances allowed in organic crop production and the nonsynthetic ones prohibited. A nonsynthetic substance is allowed unless 205.602 prohibits it, and most microbial inputs are nonsynthetic.
What it means for US registration
Organic use still depends on the whole product: how it's grown, how it's formulated and what else is in it. An organic claim on a label usually needs the product reviewed by OMRI, a certifier or the state's organic program.
Registering a product with this input?
Source: USDA National List, 7 CFR 205.601 and 205.602
See the full picture on Trichoderma harzianum
This is one lens. Every connected source on Trichoderma harzianum in one place: EPA Pesticide, Pesticide Boundary, Organic (NOP), Scientific Literature, Potential Claims, Taxonomy & Synonyms.