Table 18. Potato
Leafhopper Economic Threshold Chart for Established Stands of Alfalfa
| |
Cost of an Insecticide Application Per Acre |
| Crop
Value |
$8.00 |
$10.00 |
$12.00 |
$14.00 |
$16.00 |
$20.00 |
| |
|
|
|
|
|
|
| $60 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
1.0 |
| $80 |
0.3 |
0.4 |
0.5 |
0.5 |
0.6 |
0.8 |
| $100 |
0.3 |
0.3 |
0.4 |
0.4 |
0.5 |
0.6 |
| $120 |
0.2 |
0.3 |
0.3 |
0.4 |
0.4 |
0.5 |
| $140 |
0.2 |
0.2 |
0.3 |
0.3 |
0.3 |
0.4 |
| $160 |
0.2 |
0.2 |
0.3 |
0.3 |
0.3 |
0.4 |
| |
|
|
|
|
|
|
| |
Height Category II - 5 to 8 inches |
| $60 |
0.7 |
0.8 |
1.0 |
1.0 |
1.3 |
1.7 |
| $80 |
0.6 |
0.6 |
0.8 |
0.9 |
1.0 |
1.3 |
| $100 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
1.0 |
| $120 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
| $140 |
0.3 |
0.4 |
0.4 |
0.5 |
0.6 |
0.7 |
| $160 |
0.3 |
0.3 |
0.4 |
0.3 |
0.5 |
0.6 |
| |
|
|
|
|
|
|
| |
Height Category III - 9 to 12 inches |
| $60 |
2.0 |
2.4 |
2.8 |
3.0 |
3.9 |
5.0 |
| $80 |
1.8 |
1.9 |
2.2 |
2.7 |
3.0 |
4.0 |
| $100 |
1.2 |
1.5 |
1.8 |
2.1 |
2.4 |
3.0 |
| $120 |
0.9 |
1.2 |
1.5 |
1.8 |
2.1 |
2.4 |
| $140 |
0.9 |
1.0 |
1.2 |
1.5 |
1.8 |
2.0 |
| $160 |
0.8 |
0.9 |
1.0 |
1.2 |
1.5 |
1.8 |
|
