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AVERAGE PERFORMANCE OF EARLY VARIETES – 2002

AVERAGE PERFORMANCE OF EARLY VARIETES – 2002. AVERAGE PERFORMANCE OF EARLY VARIETES 2001-2002. AVERAGE PERFORMANCE OF EARLY VARIETES 2000-2002. AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2002. AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2001-2002. Mississippi 1997. History. History.

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AVERAGE PERFORMANCE OF EARLY VARIETES – 2002

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  1. AVERAGE PERFORMANCE OF EARLY VARIETES – 2002

  2. AVERAGE PERFORMANCE OF EARLY VARIETES 2001-2002

  3. AVERAGE PERFORMANCE OF EARLY VARIETES 2000-2002

  4. AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2002

  5. AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2001-2002

  6. Mississippi 1997 History

  7. History • do not break the 4 leaf rule • make post-direct applications as low as possible • consider alternative chemistry on post-direct applications

  8. North Carolina 1998 History

  9. North Carolina 1998 History

  10. No fruit on lower portion of plant Grower’s field Wayne County, North Carolina. Grower said he post-directed 15-20 cm from ground.

  11. Typical symptoms of glyphosate damage to GR cotton fruit 3rd position: Normal 1st position: No lint 2nd position: Some lint 5-6 days of growth between each new position.

  12. North Carolina 1998 History

  13. DP 458BRR-UNT DP 458BRR-4 lf POST DP 458BRR-4 lf POST & 8 lf PD

  14. Pollen from non-treated plants

  15. Pollen from treated plants

  16. Flower from non-treated plant--Good pollen deposition

  17. Flower from glyphosate-treated plant-- pollen deposition only on low stigma

  18. Glyphosate increases anther stigma distances Wk. 1 Wk. 2 Wk. 3 Wk. 4 d f d c Stigma tip c e c d b b b b b c a a a b b a a a a a * Means followed by with same letter within a week are not significantly different at alpha = 0.05.

  19. North Carolina 1998 History

  20. Xylem tissue, not sheared Peduncle Area of V- shaped scar Sheared abscission zone Fruiting Branch Cross section of ‘cavitated’ boll (DP 90) and fruiting branch

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