Thrips Control in VANC

1
Thrips Control in VA/NC Overview, Insights and
Options
A. Herbert S. Malone, Virginia Tech and Jack
Bacheler D. Mott, NC State
Herbert, 2006
2
Avg. lint loss potential to thrips in Virginia

• 2001352
• 2003279
• 2004341
• 2005543
• 2006655

Herbert, 2006
3
Thrips Control Levels
Excellent 1112 lb
Moderate 888 lb
Poor 469 lb
4
1254 lb lint
598 lb lint
Herbert, Virginia Tech, 2006
5
Thrips injury rating scale0 no injury, 5
dead plants
4.75
0.25
6
Cotton thrips sampling
10 seedlings/plot
7
The plant coverage issue!
8
Nozzle studyTAREC, VA, 2006
Roundup OriginalMAX _at_ 22 oz/A tank mixed with
Orthene 97 _at_ 0.36 lb ai/A ( 6 oz/A) _at_ 1st tl
2-3 tl (May 22 30), 10 gpa. Variety DP 434
RR.
Herbert, 2006
CT06THP7
9
Nozzle studyadult thrips


Mean no. adult thrips/10 plants
NS
NS
Herbert, 2006
CT06THP7
10
Nozzle studyimmature thrips


Mean no. immature thrips/10 plants

NS
NS
NS
Herbert, 2006
CT06THP7
11
Nozzle studythrips injury ratings



NS
NS
Mean plant injury rating
NS
Herbert, 2006
CT06THP7
12
Nozzle studylint yield
a
a
a
a
a
a
a
a
a
Lint yield (lb/acre)
b
Herbert, 2006
13
Hilldrop vs. single seedTAREC, 2006
DP 444 BG/RR 1 Based on a scale of 0 (no injury)
to 5 (dead plants), averaged over 4 sample dates.
Herbert, 2006
CT06THP11
14
Improvements in seed treatment technology
15
THP 4 Virginia Tech 2006
16
Thrips countsadults
Mean no. adult thrips/10 plants
Herbert, 2006
CT06THP8
17
Thrips countsimmatures
Mean no. immature thrips/10 plants
Herbert, 2006
CT06THP8
18
Thrips injury ratings




Mean plant injury rating
NS

NS
Herbert, 2006
CT06THP8
19
Lint yields--CT06THP4
a
b
b
Lint yield (lb/acre)
c
Herbert, 2006
20
THP 6 Virginia Tech 2006
21
Thrips countsadults
Mean no. adult thrips/10 plants
Herbert, 2006
CT06THP6
22
Thrips countsimmatures
Mean no. immature thrips/10 plants
Herbert, 2006
CT06THP6
23
Thrips injury ratings
Mean plant injury rating



Herbert, 2006
CT06THP6
24
Lint yieldsCT06THP6
a
a
a
a
a
a
Lint yield (lb/acre)
b
Herbert, 2006
25
Lint yieldsCT06THP6
a
a
a
a
a
a
Lint yield (lb/acre)
Herbert, 2006
26
Lint yield summaryVA, 2005-2006
Lint yield (lb/acre)
n 14
8
8
16
3
3
2
4
16
Herbert Bacheler, 2006
27
Lint yield summaryNC, 2005-2006
Lint yield (lb/acre)
n 3
4
1
3
5
2
4
5
1
Herbert Bacheler, 2006
28
Mean thrips injury ratingCT05THP4
With Orthene 97 4 oz BC
Mean injury rating
0.34 0.15
0.34 0.15
0.375
0.34
3.5 lb
5 lb
0.375
0.34
3.5 lb
5 lb
Herbert, 2005
29
Overall yield comparisons2005 tests
Orthene 97 broadcast _at_ 4.0 oz/A
Herbert, 2005
30
Cotton aphid treatments may be less with Temik
vs. seed trt. foliar
Bacheler, NC State
31
NC acreage treated for cotton aphids (2004-2005
Consultants Survey)
Difference 2.3-fold
Bacheler, NC State
32
Spider mite treatments may be less with Temik vs.
seed trt. foliar
Bacheler, NC State
33
NC acreage treated for spider mites (2004-2005
Consultants Survey)
Difference 9.1-fold
Bacheler, NC State