1. Economics of Soybean Maturity Groups’ Yield Response to Insecticides Seed Treatments with Early Planting
1Normie Buehring, 2Angus Catchot, 3Don Cook, and 3Jeff Gore 1NMREC Center; 2Entomology and Plant Pathology Dept, MSU; 3Delta Research and Extension Center

2. Objective Evaluate the effect of insecticide seed treatment on:
Variety Maturity Group (lll, lV, and V) and planting dates on growth and yield.
Returns above seed treatment cost.
B. Determine optimum planting dates for soybean variety maturity groups.

3. Locations: Verona, Starkville, and Stoneville
Maturity Groups Varieties:
MGIII (AG3906); Early MGIV (AG4403); Late MGIV (Pioneer 94B73); Early MGV (DK5068); and Late MGV (DP5634).
Planting dates:
Early April, Early May, and Early June.
Seed treatments:
Apron (CK) and Apron + Cruiser.

4. a a b b b bc bc bc cd d d de de de
A + C = 28.3 a
A = 26.5 b
1.8 e

5. a a b bc cde bcd cde def efg defg gh fgh hi i
bcde
def
efg
defg gh
fgh hi
A + C = 50.3 a
A = 46.0 b
4.3 i

6. 12D
16D
22D

7. a a ab ab ab bc c c c c d d d de e
A + C = 64.0 a
A = 61.9 b
2.1

8. 14D
18D
22D

9. Plant Height at Maturity
Yield } b
2.7 a

11. Acknowledgement
This research was supported in part by the Mississippi Soybean Promotion Board.