VARIETYLINT/ACRELENGTHMIKE Deltapine DP555BG/RR 1038** Deltapine DPLX99X * Phytogen PH98M * Sure Grow 501BR 944* Phytogen PSC * Stoneville ST4892BR Sure Grow 215BG/RR Stoneville BXN49B Sure Grow FiberMax FM Stoneville ST Stoneville ST4793R BCG 28R Sure Grow Stoneville ST Sure Grow 521R NC Deltapine DP451B/RR BCG Deltapine DP436RR BCG 30R Deltapine PM 1218BG/RR Deltapine DP 20B Deltapine PM 1199RR AVERAGE PERFORMANCE OF EARLY VARIETES 2002 AVERAGE PERFORMANCE OF EARLY VARIETES AVERAGE PERFORMANCE OF EARLY VARIETES AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2002 AVERAGE PERFORMANCE OF MEDIUM VARIETIES History Mississippi1997 do not break the 4 leaf ruledo not break the 4 leaf rule make post-direct applications as low as possiblemake post-direct applications as low as possible consider alternative chemistry on post- direct applicationsconsider alternative chemistry on post- direct applications History North Carolina 1998 History North Carolina 1998 No fruit on lower portion of plant Growers field Wayne County, North Carolina. Grower said he post-directed cm from ground. 1 st position: No lint 2 nd position: Some lint 3 rd position: Normal Typical symptoms of glyphosate damage to GR cotton fruit. 5-6 days of growth between each new position. History North Carolina 1998 DP 458BRR-UNTDP 458BRR-4 lf POST DP 458BRR-4 lf POST & 8 lf PD Pollen from non-treated plants Pollen from treated plants Flower from non-treated plant--Good pollen deposition Flower from glyphosate-treated plant-- pollen deposition only on low stigma Glyphosate increases anther stigma distances 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 = Wk. 1Wk. 2Wk. 3Wk. 4 Stigma tip History North Carolina 1998 Cross section of cavitated boll (DP 90) and fruiting branch Xylem tissue, not sheared Sheared abscission zone Fruiting Branch Peduncle Area of V- shaped scar