Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu
Disease Severity Value (DSV) Accumulation as of July 30, 2009 is as follows:
Location: Shadybrook Farms, Little Creek, DE in Kent County
Greenrow: May 1
| LATE BLIGHT | EARLY BLIGHT | |||
| Date | Daily DSV | Total DSV | Spray Recs | Accumulated P-days |
| 7/1 | 2 | 114 | 10-day interval | 519 |
| 7/2 | 1 | 115 | 10-day interval | 528 |
| 7/3-7/5 | 0 | 115 | 10-day interval | 555 |
| 7/6-7/8 | 0 | 115 | 10-day interval | 581 |
| 7/9-7/12 | 0 | 115 | 10-day interval | 616 |
| 7/13-7/15 | 0 | 115 | 10-day interval | 641 |
| 7/16 | 0 | 115 | 10-day interval | 647 |
| 7/17-7/18 | 2 | 117 | 10-day interval | 662 |
| 7/19-7/20 | 1 | 118 | 10-day interval | 680 |
| 7/21 | 2 | 120 | 7-day interval | 690 |
| 7/22 | 0 | 120 | 7-day interval | 698 |
| 7/23 | 6 | 126 | 7-day interval | 708 |
| 7/24 | 2 | 128 | 7-day interval | 716 |
| 7/25 | 0 | 128 | 7-day interval | 723 |
| 7/26 | 1 | 129 | 7-day interval | 729 |
| 7/27 | 1 | 130 | 7-day interval | 737 |
| 7/28 | 2 | 132 | 7-day interval | 743 |
| 7/29 | 0 | 132 | 7-day interval | 748 |
| 7/30 | 2 | 134 | 7-day interval | 755 |
Current conditions are favorable again for late blight on potato and tomato. The weather of the last few days will continue to provide favorable weather for late blight especially if we continue to have scattered thundershowers and high humidity as predicted.
This will be the last disease advisory of the season. Happy digging.