# SRT Transcript Correction Summary
## File: Weed Control in Turf — A Review of the Basics and Recent Updates

**Date Corrected:** March 12, 2026
**Webinar Date:** November 17, 2017 (pre-recorded November 10, 2017)
**Series:** Green & Commercial
**Topic:** Weed Science / Turfgrass
**Speaker:** Dr. Patrick McCullough, Weed Scientist, University of Georgia
**Moderator:** None (pre-recorded presentation, no live Q&A)

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## SOURCE VERIFICATION
- **Original blocks:** 649
- **Corrected blocks:** 649 ✓ MATCH CONFIRMED
- **Time range:** 00:00:11,300 to 01:10:22,200
- **Runtime:** ~70 minutes
- **File reading:** COMPLETE ✓
- **Coverage proof:**
  - Early [~02:50]: Seed head identification characteristics; dallisgrass alternating spikes vs crowfootgrass spikes joining at base
  - Middle [~38:00]: Herbicide resistance through selection pressure; one resistant biotype in year one spreading to dominant population by year five
  - Late [~1:05:30]: Solero (mesosulfuron) from Nufarm for sedge control; comparable to Monument and Certainty

---

## Correction Assessment

This transcript required **unusually heavy correction**. Whisper struggled systematically with herbicide active ingredient names, product trade names, and weed science terminology throughout the 70-minute presentation. The most extreme case was the new active ingredient "halauxifen," which Whisper rendered at least five different ways across the transcript. The term "sulfonylurea" was garbled in nearly every instance. Several Whisper substitution errors were semantically plausible but wrong ("pre-inversion" for "pre-emergent," "paint mix" for "tank mix," "wheat" for "weed").

Approximately 150 lines required correction across 649 subtitle blocks.

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## Corrections Applied

### Chemical/Active Ingredient Names (Dominant Error Category)
- "phyloxephen" / "Chaloxifen" / "hyloxipin" / "heloxifen" → "halauxifen" (Blocks 506, 509, 513, 535, 539, 556, 558)
- "sulfentrizone" / "Sulfentrosone" / "Sulfendazone" → "sulfentrazone" (Blocks 451, 478, 484, 489, 613, 614)
- "Carpentersone" → "carfentrazone" (Blocks 615, 616)
- "sulfamilurea" / "sulfamilia urea" / "sulfamilia" → "sulfonylurea" (Blocks 412, 447, 448, 449, 467, 468, 471, 484)
- "hallow-sulfuron" / "how low sulfur on" → "halosulfuron" (Blocks 477, 609)
- "Mazisulfuron" → "mesosulfuron" (Block 603)
- "metzulfuron" → "metsulfuron" (Block 42)
- "phleroxapyr" / "cloroxypyr" → "fluroxypyr" (Blocks 536, 558)
- "Florazolam" → "florasulam" (Block 515)
- "pendimethylene" / "pentamethylin" / "pendimethylin" / "penimethylene" → "pendimethalin" (Blocks 300, 329, 369, 373)
- "panoxyslum" → "penoxsulam" (Block 562)
- "imazoquin" / "imazoquine" → "imazaquin" (Blocks 630, 631)
- "isoxifen" → "isoxaben" (Block 254)
- "oxidiazone" → "oxadiazon" (Block 301)
- "Remsulfuron" / "rib sulfur on" → "rimsulfuron" (Blocks 449, 461)
- "dinitroanulins" / "dinitroanlin" / "dinitroanilins" → "dinitroanilines" / "dinitroaniline" (Blocks 332, 371, 410, 471)
- "phryzine" → "triazine" (Block 410)
- "In Dazaflam" → "indaziflam" (Block 331)

### Product/Trade Names
- "Spectacle" / "spectacle" → "Specticle" (Blocks 330, 430, 458)
- "sedge hammer" → "SedgeHammer" (Block 481, 609)
- "Newfarm" → "Nufarm" (Blocks 603, 604)
- "Valen" → "Valent" (Block 604)
- "Vexus" / "vexus" / "nexus" → "Vexis" (Blocks 562, 577, 579, 587, 589)
- "Dismis" / "dismissed" → "Dismiss" (Blocks 478, 617, 624)
- "Dismiss NXP" → "Dismiss NXT" (Blocks 623, 624)
- "transit" → "TranXit" (Block 450)
- "freeham" → "Freehand" (Block 491)
- "GAMON" → "Game On" (Blocks 550, 551)
- "Sidgeron 2%" → "siduron," (Block 299) — see Flagged for Verification
- "Basagrin" / "vasagrin" → "Basagran" (Blocks 479, 486)

### Grass Species Names (Compound Standardization)
- "Dallas grass" → "dallisgrass" (Blocks 31, 39, 43, 46)
- "bahia grass" / "bahay grass" → "bahiagrass" (Blocks 42, 45)
- "turf grass" / "Turf grass" → "turfgrass" (Throughout — ~30+ instances)
- "Bermuda grass" / "bermuda grass" / "Bermuda brass" → "bermudagrass" (Blocks 122, 133, 138, 139, 442, 467, 541, 547)
- "centipede grass" / "Centipede grass" → "centipedegrass" (Blocks 134–135, 175, 448, 460, 462, 522, 559)
- "zoysia grass" / "Zoysia grass" → "zoysiagrass" (Blocks 135, 442, 467, 522)
- "barnyard grass" → "barnyardgrass" (Blocks 58, 59)
- "crowfoot grass" → "crowfootgrass" (Block 32)
- "St. Augustine grass" → "St. Augustinegrass" (Blocks 529, 539, 559)
- "nut sedge" → "nutsedge" (Blocks 481, 489)
- "dove weed" / "Dove weed" → "doveweed" (Blocks 105, 530, 550, 554)
- "dollar weed" / "Dollar weed" → "dollarweed" (Blocks 181, 184)
- "lawn burr weed" / "lawn burrow weed" → "lawn burweed" (Blocks 585, 586)

### Weed Species / Scientific Names
- "Cyperis compressus" → "Cyperus compressus" (Block 475)
- "past palum" → "Paspalum" (Blocks 37–38)
- "Poa annula" / "Pola Angula" / "Poet Annua" / "Poa Annual" / "POA annual" / "po-annual" → "Poa annua" (Blocks 326, 373, 435, 448, 502, 633)
- "POA" (standalone) → "Poa" (Blocks 425, 429, 430, 431, 435, 437, 443, 472)
- "polo" / "pook" → "Poa" (Blocks 432, 441, 463, 466, 467, 473)
- "Kalinga" / "colingus" → "kyllinga" (Blocks 489, 605, 617, 619, 620, 621)
- "common Lestadiza" → "common lespedeza" (Block 531)
- "parsley pert" → "parsley-piert" (Block 579)
- "spittercress" → "bittercress" (Block 94)
- "hopped clovers" → "hop clovers" (Block 94)

### Whisper Substitution Errors
- "pre-inversion" / "pre-imversion" → "pre-emergent" (Blocks 111, 212, 266)
- "post-immersion" / "post-imversion" → "post-emergent" (Block 392, 567)
- "wheat seed" / "wheat" → "weed" / "weed species" (Blocks 36, 86, 209)
- "paint mix" / "paint mixture" → "tank mix" / "tank mixture" (Blocks 465, 479)
- "action greening" / "active greening" → "active ingredient" (Blocks 454, 473)
- "Long Care" → "lawn care" (Blocks 308, 330)
- "munigrass" → "bermudagrass" (Block 549)
- "NTEF" → "NTEP" (Block 196)
- "disease is" → "This is" (Block 74)
- "Falls is" → "Fall is" (Block 392)

### Institutions and Locations
- "georgiawether.net" → "georgiaweather.net" (Blocks 288, 292)

### Flagged for Verification
- **Block 42–43:** [VERIFY: "metsulfuron and various / species" — the phrase breaks awkwardly across blocks. Speaker may have said "metsulfuron and various other products" or similar; audio check recommended]
- **Block 74:** [VERIFY: "disease is" corrected to "This is" — confident correction but audio confirmation preferred since Whisper garbled the word boundary]
- **Block 299:** [VERIFY: "Sidgeron 2%" corrected to "siduron," — likely the speaker said "siduron 2G" (2% granular formulation); the "2%" may have been "2G" in the audio]
- **Block 439:** [NOTE: Timestamp overlap — Block 439 (48:06–48:22) overlaps with Block 440 (48:08–48:14). Block 439 contains brief filler text "So, we're going to have to do that." This appears to be a Whisper alignment artifact. Timestamps preserved per protocol.]
- **Block 513 / RELZAR:** [VERIFY: Trade name "RELZAR" — Whisper rendering appears consistent across multiple mentions; may be correct as-is. Confirm against audio or Dow/Corteva product records for the halauxifen + florasulam turf combination released in 2018]

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## SRT Format Compliance
✅ All timestamps preserved exactly as original
✅ All sequence numbers maintained (1–649)
✅ Blank lines between segments preserved
✅ Maximum 2 lines per subtitle segment maintained
✅ No segments merged or split
✅ Block count: 649 original = 649 corrected ✓

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## New Correction Patterns for Common Corrections Reference

The following Whisper error patterns were new to this transcript and should be added to the project reference:

### Chemicals/Products — Green & Commercial (New)
| Whisper Output | Correct Form |
|----------------|-------------|
| phyloxephen / Chaloxifen / hyloxipin / heloxifen | halauxifen |
| phleroxapyr / cloroxypyr | fluroxypyr |
| Florazolam | florasulam |
| Mazisulfuron | mesosulfuron |
| pendimethylene / pentamethylin / penimethylene | pendimethalin |
| panoxyslum | penoxsulam |
| imazoquin / imazoquine | imazaquin |
| isoxifen | isoxaben |
| oxidiazone | oxadiazon |
| Remsulfuron / rib sulfur on | rimsulfuron |
| Sidgeron | siduron |
| phryzine | triazine |
| In Dazaflam | indaziflam |
| Vexus / nexus | Vexis |
| transit (product name) | TranXit |
| GAMON | Game On |
| Basagrin / vasagrin | Basagran |
| freeham | Freehand |
| Valen | Valent |
| how low sulfur on | halosulfuron |
| Cinezine | simazine |

### Weed Species (New)
| Whisper Output | Correct Form |
|----------------|-------------|
| Kalinga / colingus | kyllinga |
| Cyperis | Cyperus |
| common Lestadiza | common lespedeza |
| parsley pert | parsley-piert |
| spittercress | bittercress |
| lawn burr weed / lawn burrow weed | lawn burweed |
| hopped clovers | hop clovers |
| past palum | Paspalum |

### Whisper Substitution Errors (New)
| Whisper Output | Correct Form | Context |
|----------------|-------------|---------|
| action greening / active greening | active ingredient | product rate descriptions |
| munigrass | bermudagrass | mid-sentence species reference |
| NTEF | NTEP | National Turfgrass Evaluation Program |

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**Total Corrections:** ~200+ individual corrections across 150 affected lines
**Processing:** Complete file (649 subtitle blocks, 2596 lines)
