Average performance of early varietes 2002
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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

AVERAGE PERFORMANCE OF EARLY VARIETES – 2002


Average performance of early varietes 2001 2002

AVERAGE PERFORMANCE OF EARLY VARIETES 2001-2002


Average performance of early varietes 2002

AVERAGE PERFORMANCE OF EARLY VARIETES 2000-2002


Average performance of early varietes 2002

AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2002


Average performance of early varietes 2002

AVERAGE PERFORMANCE OF MEDIUM VARIETIES 2001-2002


History

Mississippi

1997

History


History1

History

  • do not break the 4 leaf rule

  • make post-direct applications as low as possible

  • consider alternative chemistry on post-direct applications


History2

North Carolina

1998

History


History3

North Carolina

1998

History


Average performance of early varietes 2002

No fruit on lower

portion of plant

Grower’s field

Wayne County, North Carolina.

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


Average performance of early varietes 2002

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.


History4

North Carolina

1998

History


Average performance of early varietes 2002

DP 458BRR-UNT

DP 458BRR-4 lf

POST

DP 458BRR-4 lf

POST & 8 lf PD


Average performance of early varietes 2002

Pollen from non-treated

plants


Average performance of early varietes 2002

Pollen from treated plants


Average performance of early varietes 2002

Flower from non-treated

plant--Good pollen deposition


Average performance of early varietes 2002

Flower from glyphosate-treated plant--

pollen deposition only on low stigma


Average performance of early varietes 2002

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.


History5

North Carolina

1998

History


Average performance of early varietes 2002

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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