|
Number of larvae collected from a 30-stem sample |
|
|
| After 150-240 Degree Days |
| Alfalfa height |
2" |
3" |
4" |
5" |
6" |
7" |
8" |
9" |
10" |
11" |
12" |
13" |
14" |
15" |
16" |
17" |
18"+ |
| Spraying Recommended |
13+ |
20+ |
30+ |
35+ |
40+ |
40+ |
40+ |
|
|
|
|
|
|
|
|
|
|
| Resample in 5-7 days |
0-12 |
0-19 |
0-29 |
0-34 |
0-39 |
0-39 |
0-39 |
|
|
|
|
|
|
|
|
|
|
| |
| |
| |
| After 240-290 Degree Days |
| Alfalfa height |
2" |
3" |
4" |
5" |
6" |
7" |
8" |
9" |
10" |
11" |
12" |
13" |
14" |
15" |
16" |
17" |
18"+ |
| Spraying Recommended |
10+ |
10+ |
15+ |
15+ |
15+ |
20+ |
20+ |
25+ |
25+ |
25+ |
|
|
|
|
|
|
|
| Resample in 5-7 days |
0-9 |
0-9 |
0-14 |
0-14 |
0-14 |
0-19 |
0-19 |
0-24 |
0-24 |
0-24 |
|
|
|
|
|
|
|
| |
| |
| |
| After 290-340 Degree Days |
| Alfalfa height |
2" |
3" |
4" |
5" |
6" |
7" |
8" |
9" |
10" |
11" |
12" |
13" |
14" |
15" |
16" |
17" |
18"+ |
| Spraying Recommended |
|
12+ |
18+ |
25+ |
25+ |
25+ |
30+ |
30+ |
30+ |
30+ |
30+ |
30+ |
30+ |
35+ |
35+ |
|
|
| Resample in 5-7 days |
|
0-11 |
0-17 |
0-24 |
0-24 |
0-24 |
0-29 |
0-29 |
0-29 |
0-29 |
0-29 |
0-19 |
0-29 |
0-34 |
0-34 |
|
|
| |
| |
| |
| After 340-390 Degree Days |
| Alfalfa height |
2" |
3" |
4" |
5" |
6" |
7" |
8" |
9" |
10" |
11" |
12" |
13" |
14" |
15" |
16" |
17" |
18"+ |
| Spraying Recommended |
|
|
|
|
25+ |
25+ |
30+ |
30+ |
30+ |
35+ |
35+ |
35+ |
35+ |
35+ |
35+ |
40+ |
|
| Resample in 3-5 days |
|
|
|
|
14-24 |
14-24 |
14-29 |
14-29 |
14-29 |
14-34 |
17-34 |
17-34 |
17-34 |
17-34 |
17-34 |
18-39 |
|
| Resample in 5-7 days |
|
|
|
|
0-13 |
0-13 |
0-13 |
0-13 |
0-13 |
0-13 |
0-16 |
0-16 |
0-16 |
0-16 |
0-16 |
0-17 |
|
| |
| |
| |
| After 390-540 Degree Days |
| Alfalfa height |
2" |
3" |
4" |
5" |
6" |
7" |
8" |
9" |
10" |
11" |
12" |
13" |
14" |
15" |
16" |
17" |
18"+ |
| Spraying Recommended |
|
|
|
|
|
|
|
|
|
20+ |
20+ |
25+ |
30+ |
30+ |
35+ |
35+ |
40+ |
| Resample in 3-5 days |
|
|
|
|
|
|
|
|
|
8-19 |
8-19 |
8-24 |
14-29 |
14-29 |
14-34 |
18-34 |
18-39 |
| Resample in 5-7 days |
|
|
|
|
|
|
|
|
|
0-7 |
0-7 |
0-7 |
0-13 |
0-13 |
0-13 |
0-17 |
0-17 |
| |
| |
| |
| From 540+ Degree Days until Harvest |
| Change in number of larvae since last sample |
|
Decreased by 10 or more |
Changed by less than 10 |
Increased by 10 or more |
|
| Spraying or Harvesting Recommended |
|
35+ |
30+ |
25+ |
|
| Resample in 3-5 days |
|
18-34 |
14-29 |
8-24 |
|
| Resample in 5-7 days |
|
0-17 |
0-13 |
0-7 |
|
