Printable Report (pdf format)
Background information pertaining to white grub insecticide experiments conducted at the Dean Eckstrom field north of McLean, NE 2002.
Species
Still to be identified
Agronomic
Hybrid: Novartis 58D1
Row Spacing: 30 inches
Planting Date: 6 May
Planter: John Deere Maxemerge, 2 row
Planting Depth: 2 inches
Application Equipment:Granules at planting: Planter mounted cone-belt system, all in-furrow in front of press wheel
All liquids applied with microtube in-furrow in front of press wheel at 5 gallons solution/acre, 24 psi|
Seed treatments were applied by the companies on N58D1 and sent to us.Previous Crop: 2001 corn replanted to soybean due to extensive stand loss
Tillage: Disk once previous to planting
Field History: Corn-soybean rotation multiple years
Irrigation: None
Plot Direction: East-West
Plot length: 45 ft
Experimental
Design and Evaluation
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 7, 10, 14, 17 and 25 June
Statistical evaluation based on 25 June count.
Comments: A 15 acre area of this field was nearly 100% destroyed by white grubs in 2001. Soybeans were replanted in the area in June of 2001 and were not damaged by the grubs. Enough grubs were left in 2002 to give us a good screening experiment. Stunting occurred throughout the rating period and yield will be taken in October. No phytotoxic symptoms were present, except those caused by the grubs (stunting and purpling caused by lack of root system). Rainfall was not recorded but virtually no rain fell during the planting to recording period. Rainfall from Concord is given but less rain probably fell on this plot
Keith
Jarvi, White Grub Insecticide Experiment, McLean, NE 2002.
Application Methods:
ST = Seed Treatment
IF = In-furrow in front of press wheel at planting time
MT = Microtube at planting
Plant Population per 30 ft of row (25 June)
|
|
Application Method |
Rate |
Plant Population |
|
Gaucho |
ST |
0.165 ke |
37.50 a |
|
Aztec 2.1 G |
IF |
6.7 oz/1000 ft of row |
36.25 ab |
|
Clothianidin |
ST |
0.25 ke |
36.00 ab |
|
Proshield |
ST |
3.5 g ai 100kg seed |
36.00 ab |
|
Force 3 G |
IF |
4 oz /1000 ft of row |
35.75 ab |
|
Lorsban 15 G |
IF |
8 oz/1000 ft of row |
35.25 ab |
|
Cruiser 12.5 bag 6 |
ST |
12.5 g ai/100 kg seed |
35.00 abc |
|
Fortress 2.5 G |
IF |
7.4 oz/1000 ft of row |
34.75 abc |
|
Counter 20 CR |
IF |
6 oz/1000 ft of row |
34.50 abc |
|
F0570 |
IF MT |
1.44 oz/acre |
34.25 abc |
|
Capture 2E |
IF MT |
0.15 oz/1000 ft of row |
34.00 abc |
|
Icon (Regent) |
ST |
50g ai/100 kg seed |
32.25 bcd |
|
Cruiser 50 bag 3 |
ST |
50 g ai/100 kg seed |
32.25 bcd |
|
Pounce 3.2 EC |
IF MT |
4 oz/acre |
31.00 cd |
|
Regent |
IF MT |
|
29.75 d |
|
Untreated |
|
|
29.75 d |
Means
with the same letter are not significantly different. (LSD = 4.1069;
alpha = 0.05)
|
January
Total
|
0.74 | |
|
February
Total
|
1.41 | |
|
March
Total
|
1.21 | |
|
April
|
1 | 0.04 |
| 11 | 0.12 | |
| 12 | 0.14 | |
| 13 | 0.10 | |
| 17 | 0.68 | |
| 21 | 0.95 | |
| 23 | 0.24 | |
| 27 | 0.38 | |
| 28 | 0.49 | |
| 29 | 0.05 | |
| 30 | 0.11 | |
|
April Total
|
3.30 | |
|
May
|
1 | 0.29 |
| 2 | 0.27 | |
| 7 | 0.20 | |
| 8 | 0.10 | |
| 11 | 0.89 | |
| 12 | 0.70 | |
| 13 | 0.02 | |
| 22 | 0.04 | |
| 27 | 0.03 | |
| 28 | 0.13 | |
|
May Total
|
2.67 | |
|
June
|
4 | 0.27 |
| 5 | 0.10 | |
| 8 | 0.80 | |
| 9 | 0.04 | |
| 11 | 1.25 | |
| 12 | 0.13 | |
|
June Total
|
2.59 | |
|
July
3
|
0.16 | |
| 10 | 0.61 |
|
|
July
total until rating
|
0.77 |