Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu
Disease Severity Value (DSV) Accumulation as of July 28, 2010 is as follows:
Location: Art and Keith Wicks Farm, Rt 9, Little Creek, Kent County
Green row: May 6
| LATE BLIGHT | EARLY BLIGHT | |||
| Date | Daily DSV | Total DSV | Spray Recs | Accumulated P- days* |
| 7/1–7/5 | 0 | 42 | 10-days | 444 |
| 7/6-7/7 | 0 | 42 | 10-days | 449 |
| 7/8 | 1 | 43 | 10-days | 454 |
| 7/9 | 8 | 51 | 7-days | 462 |
| 7/10 | 0 | 51 | 7-days | 471 |
| 7/11-7/12 | 0 | 51 | 7-days | 484 |
| 7-12-7/13 | 3 | 54 | 7-days | 490 |
| 7/13–7/14 | 10 | 64 | 7-days | 499 |
| 7/15-7/16 | 1 | 65 | 7-days | 508 |
| 7/17-7/20 | 0 | 65 | 10-days | 526 |
| 7/20-7/21 | 1 | 66 | 10-days | 530 |
| 7/22-7/24 | 0 | 66 | 10-days | 540 |
| 7/25-7/26 | 2 | 68 | 10-days | 552 |
| 7/26-7/28 | 0 | 68 | 10-days | 565 |
There have been no new reports of late blight in the region since last week when we reported that late blight was found in a potato field north of Bridgeton, NJ.
If you still have green foliage, maintain fungicide applications.
For specific fungicide recommendations, see the 2010 Delaware Commercial Vegetable Production Recommendations Book.