Add 4 independent seed brands: Latham + Stine + 1st Choice + Burrus (+623 varieties) (#17)

Co-authored-by: claude <claude@jpaul.io> Co-committed-by: claude <claude@jpaul.io>
2026-06-04 21:58:07 -04:00
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+# Power Plus 4R40
+
+- **Vendor:** Burrus Seed (Burrus Hybrids — independent family company, Arenzville, IL, since 1935)
+- **Brand:** Power Plus
+- **Crop:** Corn
+- **Relative maturity:** 108 days
+- **Trait(s):** Conventional, Conv
+- **Released:** 2022
+- **Source:** https://burrusseed.com/products/corn
+- **Rating scale:** numeric agronomic + disease ratings 1-10, 10=best/most-tolerant (observed 4-10; higher is better); NR/blank/0/'-' = not rated (omitted). Herbicide tolerances and Bt insect-protection packages are Yes/No (verbatim, not numeric). Corn-on-corn suitability and refuge structure are categorical.
+- **Service area:** Burrus dealer network (IL / IN / IA / MO / WI)
+
+---
+
+## Disease Ratings
+
+- **Gray leaf spot tolerance:** 8
+- **Tar spot tolerance:** 7
+
+## Agronomic Characteristics
+
+- **Drought tolerance:** 7
+- **Greensnap tolerance:** 8
+- **Root strength:** 9
+- **Stalk strength:** 8
+- **Black cutworm tolerance:** 8
+- **Corn-on-corn suitability:** Exc + SAI
+- **Refuge structure:** None needed
+- **Corn borer protection (Bt):** No
+- **Corn rootworm protection (Bt):** No
+- **Nematode protection:** Yes
+- **Wireworm protection:** Yes
+
+## Herbicide Tolerance
+
+- **Glyphosate tolerance:** No
+- **Glufosinate tolerance:** No
+- **2,4-D choline tolerance:** No
+- **FOPs (fop herbicide) tolerance:** No