Cotton Diseases in 2019

Terry Wheeler

Texas A&M AgriLife Research

Lubbock

• Seedling Diseases: Poor root growth and emergence north and east of Lubbock. Probably due to cool and wet conditions. Not necessarily seedling disease but contributed.

• Fusarium Wilt: To be covered by Cecilia Monclova-Santana

• Nematodes: Significant problem in 2019

• Bacterial blight: No problems in 2019

• Verticillium wilt: Probably none to minimal losses in 2019

Lamesa: Root-knot Nematode Reproduction

0

5000

10000

15000

20000

25000

30000

35000

40000

PX

5C

05

W3

FE

PX

5C

45

W3

FE

PX

5E3

4W

3FE

PX

3D

43W

3FE

PH

Y3

20W

3FE

PX

2B

14W

3FE

PX

5D

28W

3FE

PX

5E2

8W

3FE

PH

Y4

80

W3

FE

PH

Y5

80

W3

FE

DP

17

47N

RB

2X

F

DP

18

23N

RB

2X

F

FM1

911

GLT

ST4

94

6GLB

2

NG

395

6B3

XF

CG

917

8B3

XF

NG

399

4B3

XF

PH

Y4

90

W3

FE

DP

18

51

B3

XF

ST5

70

7B2

XF

DP

15

22

B2

XF

CG

960

8B3

XF

DP

16

46

B2

XF

NG

493

6B3

XF

NG

468

9B2

XF

DP

18

20

B3

XF

FM2

398

GLT

P

FM2

574

GLT

DP

19

09X

F

NG

364

0XF

NG

477

7B2

XF

Ro

ot-

kno

t n

em

ato

de

/5

00

cc

soil

Phytogen (PHY, PX)Deltapine (DP)Fibermax (FM), Stoneville (ST)NexGen (NG)Croplan Genetics (CG)

Nocontrol

Vydate

PropulseAt-Plant in the furrow

AgLogic 15G

Chemical Control in a Reniform Fields

0

200

400

600

800

1000

1200

1400

1600

1800

2000

PX

5E2

8W

3FE

DP

184

0B

3X

F

PX

5E3

4W

3FE

PX

3D

43

W3

FE

PX

3D

32

W3

FE

DP

17

47

NR

B2X

F

PX

3B

07

W3

FE

NG

35

00

XF

NG

39

56

B3

XF

PH

Y49

0W

3FE

DP

161

2B

2X

F

NG

37

80

B2

XF

NG

45

45

B2

XF

DP

18

22

XF

NG

49

36

B3

XF

DP

184

5B

3X

F

NG

39

30

B3

XF

ST5

60

0B

2X

F

FM2

49

8G

LT

NG

46

89

B2

XF

DP

191

6B

3X

F

PH

Y32

0W

3FE

DP

18

23

NR

B2X

F

DP

152

2B

2X

F

DP

182

0B

3X

F

FM1

91

1G

LT

ST4

94

6G

LB2

NG

47

77

B2

XF

FM1

83

0G

LT

DP

164

6B

2X

F

PH

Y48

0W

3FE

ST5

70

7B

2X

F

Re

nif

orm

ne

mat

od

es/

10

0 c

m3

soil

Lubbock: Reniform Nematode Reproduction in Varieties

Phytogen (PHY, PX)Deltapine (DP)Fibermax (FM), Stoneville (ST)NexGen (NG)

* * * *

Reniformresistant

varieties

PX3D32W3FE NG 3930B3XFFM 1911GLT

PX5E34W3FENG 3930B3XF DP 1612B2XF

PX3D43W3FEFM 1830GLT Different test

PX5E28W3FEDP 1845B3XF DP 1522B2XF

PHY 480W3FEST 5707B2XF DP 1820B3XF

ST 4946GLB2NG 4545B2XFDP 1522B2XF

A comparison of three reniform susceptible varieties (the camera angle is not causing the middle variety to look better than the flanking varieties).

Varieties with Reniform nematode resistance are very close to being available

Chemical control does not appear to be as effective as the new resistant varieties.

Verticillium Wilt

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

FM2

57

4G

LT

FM2

33

4G

LT

FM1

91

1G

LT

NG

47

77

B2

XF

ST5

60

0B

2X

F

NG

46

89

B2

XF

NG

36

40

XF

NG

47

92

XF

NG

39

30

B3

XF

NG

49

36

B3

XF

FM2

39

8G

LTP

CG

95

98

B3

XF

DP

18

40

B3

XF

ST5

70

7B

2X

F

FM2

49

8G

LT

FM1

83

0G

LT

DP

16

12

B2

XF

NG

29

82

B3

XF

ST4

55

0G

LTP

DP

18

51

B3

XF

DP

18

45

B3

XF

DP

19

48

B3

XF

NG

39

94

B3

XF

DP

19

16

B3

XF

CG

96

08

B3

XF

DP

19

09

XF

DP

18

35

B3

XF

Wilt

inci

de

nce

(%

) Deltapine (DP)Fibermax (FM), Stoneville (ST)NexGen (NG)Croplan Genetics (CG)

Incidence of Verticillium wilt in Hockley co.

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

FM2

57

4G

LT

NG

39

30

B3

XF

NG

39

56

B3

XF

FM2

33

4G

LT

FM2

39

8G

LTP

FM1

91

1G

LT

PH

Y2

10

W3

FE

FM1

62

1G

L

FM1

32

0G

L

FM2

32

2G

L

DP

18

22

XF

NG

36

40

XF

PH

Y2

50

W3

FE

NG

35

00

XF

ST5

60

0B

2X

F

DP

16

12

B2

XF

NG

37

80

B2

XF

CG

95

98

B3

XF

CG

91

78

B3

XF

DP

18

20

B3

XF

NG

29

82

B3

XF

CG

96

08

B3

XF

DP

19

09

XF

DP

19

08

B3

XF

Ve

rtic

illiu

m w

ilt in

cid

en

ce

Phytogen (PHY, PX)Deltapine (DP)Fibermax (FM), Stoneville (ST)NexGen (NG)Croplan Genetics (CG)

Wilt incidence at a test near Plainview

0

10

20

30

40

50

60

70

80

90

100

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

%

Cotton Varieties (%) planted that are susceptible to Bacterial Blight.

GA MS TX

0

10

20

30

40

50

60

70

80

90

100

Bac

teri

al b

ligh

t in

cid

en

ce (

%)

Performance of some new varieties when inoculated withXanthomonas citri pv. malvacearum

Resistant

Partiallyresistant

Partiallysusceptible

Moderatelysusceptible

Susceptible

I appreciate the funding sources for these projects including:

Texas Cotton State SupportPlains Cotton Improvement Program

USDA-NIFA #TEX09672

Producers who donated their land area for these research projects are: Ron Graves, Glenn Schur and Larry Smith