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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+# LH 4450 CNV
+
+- **Vendor:** Latham Hi-Tech Seeds (independent family-owned, Alexander, IA)
+- **Brand:** Latham Hi-Tech Seeds
+- **Crop:** Corn
+- **Relative maturity:** 94 days
+- **Trait(s):** CNV
+- **Source:** https://www.lathamseeds.com/products/lh-4450-cnv/
+- **Rating scale:** numeric ratings ~1-9 where LOWER = BETTER (1 = best / most tolerant / most resistant); confirmed by cross-referencing Product Overview prose vs values (top-rated stalks/roots cluster 1.0-1.5, weak traits 3.0-3.5, none approach 9). Categorical values pass through verbatim (SCN source 'PI 88788', Phytophthora 'Rps 1k', Anthracnose 'ASR', 'Medium Tall', 'Flex'). NA/blank = not rated.
+- **Service area:** Latham dealer network — Upper Midwest (IA/MN/WI/IL/ND/SD/NE)
+
+---
+
+_LH 4450 conventional provides consistent performance across most soil types and cropping sequences. It has excellent stalk and root strength with very good test weight and grain quality. LH 4450 has good east-to-west movement and will move farther south while maintaining plant health._
+
+---
+
+## Agronomic Characteristics
+
+- **Emergence:** 2.0
+- **Flowering for Maturity:** Moderately Late
+- **Early Vigor:** 2.4
+- **Stalk Strength:** 2.0
+- **Root Strength:** 2.0
+- **Stay Green:** 2.1
+- **Drydown:** 1.5
+- **Test Weight:** 1.9
+- **Drought Tolerance:** 1.5
+- **Herbicide Sensitivity:** None Known
+- **Suggested Population:** 30-34
+- **Corn-on-Corn:** 1.5
+- **Ear Height:** Medium Low
+- **Ear Type:** Determinate
+- **Number of Kernel Rows:** 16-18
+- **Cob Color:** Red
+- **Husk Cover:** Medium
+- **Shank Length:** Medium
+- **Leaf Angle:** Semi-Upright
+
+## Disease Ratings
+
+- **Goss’s Wilt:** 2.5
+- **Common Rust:** 1.8
+- **Southern Leaf Blight:** 2.5
+- **Northern Leaf Blight:** 3.0
+- **Eye Spot:** 1.9
+- **Gray Leaf Spot:** 2.5