Background information pertaining to wireworm/seedling insect experiment conducted at the John Sandahl  field north of Emerson NE 2001.

Hybrid:

Novartis 58D1

Row Spacing:

30 inches

Planting Date:

11 May

Planter:

John Deere Maxemerge, 2 row

Planting Depth:

2 inches

Application Equipment:

Granules at planting: Planter mounted cone-belt system, in-furrow in front of press wheel or T-band in front of press wheel

All liquids except Capture in a T-band: Microtube in-furrow in front of press wheel at 5 gallons solution/acre

Capture T band liquid formulation: 5 inch T band in front of press wheel at 5 gallons solution/acre

                All liquids applied at 24 psi

                Seed treatments were all pretreated Novartis 58D1

Previous Crop:

No-till soybean

Tillage:

Non

Field History:

Corn-soybean rotation multiple years

Irrigation:

None

Plot Direction:

North-South

Plot length:

45 ft

Randomized complete block with 4 replications, single row, no border rows between treatments

Ratings:  Plant population in middle 30 ft of row

Plant populations were taken on 21 and  25 May and , 1, 7, and 22 June

Statistical evaluation based on 22 June count

Comments:  Wireworm traps in the plot area captured an average of 2 larvae per trap, considered to be above the economic threshold.  This field has a history of wireworm problems.  Dead wireworms and cutworms  (species not identified) were observed on the surface of the ground during the taking of the stand counts.  Nearest rainfall data is from Concord, NE, approximately 12 miles west of the field.  Counter 20 CR produced onion-leaf symptoms on 15-20% of the plants in this plot.

Keith Jarvi, Tom Hunt and Jerry Echtenkamp

Wireworm Insecticide Screening Experiment, Emerson, NE 2001.  

Application Methods:

Granular TB = 7 inch T-band in front of press wheel at planting time

Capture 2 EC 5 inch T-band in front of press wheel at planting time

IF = In-furrow in front of press wheel at planting time

MT = Microtube at planting

ST = Seed treatment

Treatment

Application Method

Rate
Product or amount ai

Plant Population

Gaucho

ST

0.165 mg ai/kernel

36.25

a

Warrior

IF MT

1 oz/acre

36.25

a

Force 3 G

IF

3 oz/1000 ft of row

36.25

a

Adage 5 FS

ST

200g ai/100 kg seed

35.25

a

Aztec 4.67

IF

2.25 oz/1000 ft of row

35.00

a

b

Clothianidin

ST

0.25 mg ai/kernel

34.75

a

b

Adage 5 FS

ST

50 g ai/100 kg seed

34.75

a

b

Fortress 5 G

IF

3 oz/1000 ft of row

34.00

a

b

c

Capture 2 EC

IF MT

0.15 oz ai/1000 ft of row

32.75

a

b

c

d

Pounce 3.2 EC

IF MT

2 oz/acre

32.50

a

b

c

d

Pounce 3.2 EC

IF MT

4 oz/acre

32.50

a

b

c

d

Force 200 ST

ST

260 ml/100 kg seed

32.25

a

b

c

d

Capture 1.15 G

TB

8 oz/1000 ft of row

32.00

a

b

c

d

Adage 5 FS

ST

100 g ai/100 kg seed

32.00

a

b

c

d

Kernel Guard Supreme 24.42 DS

ST

54.8 g ai/100 kg seed

32.00

a

b

c

d

ProShield

ST

32.00

a

b

c

d

Capture 1.15 G

IF

4 oz/1000 ft of row

31.75

a

b

c

d

Regent 4 SC

IF MT

.12 oz/1000 ft of row

30.00   

b

c

d

F0570

IF MT

1.44 oz/acre

30.00   

b

c

d

Capture 1.15 G

TB

4 oz/1000 ft of row

29.25      

c

d

Counter 20 CR

IF

3 oz/1000 ft of row

28.75         

d

Aztec 2.1 G BD

IF

5.025 oz/1000 ft of row

28.25         

d

Untreated

28.25         

d

Regent 4 SC

IF MT

.24 oz/1000 ft of row

27.75         

d

Month

Date

Amount

Month

Date

Amount

April

3

.11

July

1

.43

5

.02

2

.72

6

.53

3

.01

7

.30

8

.14

10

.18

11

.11

11

1.84

12

.06

12

.02

16

1.41

13

.03

17

0.06

20

.15

Total

2.94

21

.01

22

.86

23

.02

28

.04

29

.53

30

.36

Total

5.36

May

1

.48

2

.47

3

.26

4

.37

5

.72

6

.04

12

.21

19

.83

20

.21

21

.01

23

.03

24

.03

29

.01

30

.33

31

.25

Total

4.25

June

4

.28

5

.02

10

.05

12

.11

13

.16

14

.09

25

.44

Total

1.15