VARIETYVARIETY LINT/ACRELINT/ACRE LENGTHLENGTH MIKEMIKEDeltapine DP555BG/RR Deltapine DP555BG/RR 1038**1038** 1.051.05 4.84.8+Deltapine DPLX99X35 +Deltapine DPLX99X35 1025*1025* 1.071.07 4.84.8+Phytogen PH98M-2983 +Phytogen PH98M-2983 972*972* 1.071.07 4.34.3Sure Grow 501BR Sure Grow 501BR 944*944* 1.051.05 4.64.6Phytogen PSC355 Phytogen PSC355 939*939* 1.081.08 4.94.9Stoneville ST4892BR Stoneville ST4892BR 925925 1.051.05 4.74.7Sure Grow 215BG/RR Sure Grow 215BG/RR 904904 1.021.02 4.54.5Stoneville BXN49B Stoneville BXN49B 877877 1.081.08 4.24.2Sure Grow 105 Sure Grow 105 856856 1.101.10 4.64.6FiberMax FM958 FiberMax FM958 824824 1.121.12 4.84.8Stoneville ST457 Stoneville ST457 821821 1.081.08 4.34.3Stoneville ST4793R Stoneville ST4793R 814814 1.031.03 4.84.8BCG 28R BCG 28R 811811 1.081.08 5.05.0Sure Grow 747 Sure Grow 747 808808 1.081.08 4.84.8Stoneville ST474 Stoneville ST474 782782 1.051.05 4.74.7Sure Grow 521R Sure Grow 521R 779779 1.041.04 4.44.4+NC 01-121 +NC 01-121 774774 1.041.04 4.74.7Deltapine DP451B/RR Deltapine DP451B/RR 768768 1.091.09 4.34.3BCG 295 BCG 295 760760 1.131.13 4.34.3Deltapine DP436RR Deltapine DP436RR 739739 1.101.10 4.24.2BCG 30R BCG 30R 732732 1.111.11 4.24.2Deltapine PM Deltapine PM 1218BG/RR 1218BG/RR 726726 1.031.03 4.34.3

Deltapine DP 20B Deltapine DP 20B 723723 1.111.11 4.34.3Deltapine PM 1199RR Deltapine PM 1199RR 691691 1.081.08 4.84.8

AVERAGE PERFORMANCE OF EARLY VARIETES – 2002

AVERAGE PERFORMANCE OF EARLY VARIETES 2001-2002

LINT UHMVARIETY OR YIELD S.L.BRAND VARIETY LB/ACRE (IN.) MIKE

Sure Grow 215BG/RR 1140** 1.04 4.5Stoneville ST4892BR 1132* 1.06 4.6Phytogen PSC355 1108* 1.10 4.8Sure Grow 501BR 1076* 1.06 4.6Sure Grow 105 1073* 1.12 4.6Stoneville BXN49B 1060 1.11 4.1FiberMax FM958 1051 1.14 4.6Sure Grow 747 1049 1.10 4.7Stoneville ST457 1026 1.11 4.2Stoneville ST474 1019 1.07 4.6Sure Grow 521R 1001 1.06 4.4Stoneville ST4793R 992 1.05 4.8Deltapine PM 1218BG/RR 990 1.05 4.5Deltapine DP451B/RR 975 1.11 4.3Deltapine DP436RR 953 1.11 4.2Deltapine DP 20B 947 1.13 4.2Deltapine PM 1199RR 934 1.10 4.7

LINT UHMVARIETY OR YIELD S.L.BRAND VARIETY LB/ACRE (IN.) MIKE

Stoneville ST4892BR 1177** 1.06 4.5Phytogen PSC355 1172* 1.10 4.7FiberMax FM958 1134* 1.13 4.5Sure Grow 501BR 1119 1.06 4.5Sure Grow 105 1117 1.12 4.4Sure Grow 747 1100 1.10 4.6Deltapine PM 1218BG/RR 1087 1.05 4.6Stoneville ST474 1085 1.07 4.5Stoneville ST4793R 1056 1.04 4.7Deltapine DP451B/RR 1037 1.11 4.2Deltapine DP436RR 1023 1.11 4.1Deltapine DP 20B 1016 1.12 4.1

AVERAGE PERFORMANCE OF EARLY VARIETES 2000-2002

VARIETY OR YIELD S.L.BRAND VARIETY LB/ACRE (IN.) MIKE

Deltapine DP555BG/RR 1082** 1.06 4.7Deltapine Delta PEARL 998 1.11 4.9Deltapine DP491 930 1.14 4.5Deltapine DP565 876 1.09 4.7Stoneville ST5599BR 865 1.07 4.5Deltapine NuCOTN35B 844 1.06 4.4Phytogen PSC HS12 839 1.11 4.6Deltapine DP 5415RR 839 1.09 4.6Phytogen PSC GA 161 839 1.12 4.3Deltapine DP458BRR 837 1.07 4.5FiberMax 989R 833 1.07 4.1Deltapine NuCotn33B 827 1.10 4.3FiberMax 991R 824 1.09 4.3FiberMax 966 820 1.11 4.6Deltapine DP5415 812 1.10 4.5Stoneville AP7126 806 1.10 4.3Stoneville ST5303R 792 1.04 4.8Deltapine DP 5690RR 791 1.08 4.5BCG 245 791 1.15 4.2Deltapine DP451B/RR 772 1.09 4.4FiberMax 989BR 765 1.08 4.2Deltapine DP448B 762 1.08 4.4Stoneville ST474 762 1.06 4.6Deltapine DP655BRR 760 1.07 4.3BCG 24R 736 1.05 4.5FiberMax FM989 702 1.09 4.6

AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2002

LINT UHMVARIETY OR YIELD S.L.BRAND VARIETY LB/ACRE (IN.) MIKE

Deltapine Delta PEARL 1098** 1.13 4.4Deltapine DP565 1092* 1.11 4.4Deltapine DP 5415RR 1057* 1.10 4.4+Stoneville ST5599BR 1056* 1.08 4.1Deltapine DP491 1054* 1.17 4.3Deltapine DP458BRR 1050* 1.09 4.4FiberMax 966 1044* 1.13 4.4FiberMax 989BR 1043* 1.10 4.1Phytogen PSC HS12 1031* 1.12 4.4Deltapine NuCOTN35B 1028* 1.09 4.2Deltapine NuCotn33B 1028* 1.10 4.2Deltapine DP451B/RR 1023* 1.10 4.3Stoneville ST474 1022* 1.07 4.4Phytogen PSC GA 161 1015 1.15 4.1Stoneville AP7126 1003 1.13 4.1FiberMax FM989 991 1.13 4.3Deltapine DP448B 978 1.09 4.2Deltapine DP 5690RR 972 1.09 4.3Deltapine DP655BRR 964 1.09 4.1Deltapine DP5415 957 1.11 4.4

AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2001-2002

History MississippiMississippi19971997

• do not break the 4 leaf ruledo not break the 4 leaf rule

• make post-direct applications as low as make post-direct applications as low as possiblepossible

• consider alternative chemistry on post-consider alternative chemistry on post-direct applicationsdirect applications

PROBLEMS IN MID-SOUTHPROBLEMS IN MID-SOUTH

History

History North CarolinaNorth Carolina19981998

History North CarolinaNorth Carolina19981998

No fruit on lower No fruit on lower portion of plantportion of plant

Grower’s fieldWayne County, North Carolina.

Grower said he post-directed 15-20 cm from ground.

11stst position: position: No lintNo lint 22ndnd position: position:

Some lintSome lint

33rdrd position: position: NormalNormal

Typical symptoms of glyphosate damage to GR cotton fruit

5-6 days of growth between each new position..

History North CarolinaNorth Carolina19981998

DP 458BRR-UNT DP 458BRR-4 lf POST

DP 458BRR-4 lfPOST & 8 lf PD

Pollen from non-treatedplants

Pollen from treated plants

Flower from non-treated plant--Good pollen deposition

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

Glyphosate increases anther stigma distances

-10

-8

-6

-4

-2

0

2

4

Week of flowering

mm

DP 50 DP 90 DP 5415RR-UNT

DP 5415RR-TRT SG 125RR-UNT SG 125RR-TRT

b

c

b

a

b

a

c

d

b

a

b

a

e

f

d

b

c

a

c

d

b

a a a

* Means followed by with same letter within a week are not significantly different at alpha = 0.05.

Wk. 1 Wk. 2 Wk. 3 Wk. 4

Stigmatip

History North CarolinaNorth Carolina19981998

Cross section of ‘cavitated’ boll (DP 90) and fruiting branch

Xylem tissue, not sheared

Sheared abscission zone

Fruiting Branch

PeduncleArea of V-

shaped scar