Although there have been no new confirmed reports in Pennsylvania, reports of downy mildew are continuing to increase across the eastern half of the U.S.
In parts of south central PA, Northern corn leaf blight is being observed in sweet corn.
On a beautiful summer day we are on the road visiting Brett and Henry Stehr of Kenny Stehr and Sons Farm located in Pitman, Pennsylvania. The farm was started by their father in 1948 and in 1992 Brett and Henry became the owners. Brett runs the marketing side, while Henry runs the production side.
In hot dry weather spider mite populations can spike quickly. Although the weather this summer has been far from dry, where high tunnels have protected from the frequent rains, spider mites have been a problem.
This past week reports of downy mildew are continuing to increase in the Great Lakes region with nine new counties reporting outbreaks on cucumber including Elk County, PA and as of today it was also confirmed on butternut squash in Lancaster County.
Most sites continue to report very low counts for moth pests, but a 2nd generation of ECB has started, a few sites in western and central PA reported FAW, and sap beetles have emerged in some southeastern sites when worm sprays were removed. Inspect silks for sap beetles.
On Tuesday, late blight was confirmed in one commercial potato field and one potato cull pile in Erie Co., PA. These are the first reports of late blight in Pennsylvania.
The fact that spotted wing drosophila is being found in Maryland means that SWD is also likely to be present in warmer areas of Pennsylvania, and in the remainder of Pennsylvania shortly.
Anthracnose (also called ripe rot) in blueberry, has been quite severe this year, especially in highly susceptible varieties such as Bluecrop, Bluetta, and Blueray.
On Monday, late blight was confirmed in two tomato fields in Morris County in Northern NJ. These are the first reports on tomato in the mid-Atlantic and Northeast regions.
Yesterday downy mildew was confirmed on cucumber in Berks County. This is the first confirmed report in PA however there are likely more infected fields around so scout yours now if you haven’t already.
Both early blight and Septoria leaf spot are now a common sight in PA tomato fields thanks in part to the frequent rain events and persistent high relative humidity.
Although not confirmed yet in PA, the presence of nearby sources and the current weather patterns place many portions of PA at risk for cucurbit downy mildew infection.
A research project started this year is investigating different ways to increase the effectiveness of biocontrols in high tunnels.
Corn earworm counts exceed thresholds in Bradford, Luzerne, and Washington counties.
Downy mildew was confirmed on cucumber in both southeastern Michigan and in Kent Co. in the southwestern corner of the province across Lake Erie north of Ohio on 23 June.
Bacterial spot on both tomatoes and peppers is being reported across many regions of Pennsylvania. Fortunately, growers now have another tool in the toolbox for the in-season management of bacterial spot on tomato. There is now a 2(ee) label for the use of Quintec (quinoxyfen) for suppressing bacterial spot.
So far this year, several vegetable and small fruit growers have reported herbicide injury to their crops. Use the proper herbicide formulations to prevent damage to non-target plants.
For a crop that may fruit for fifty years under the right care, it is critical to get blueberry plants off to a strong, healthy start.
Spotted wing drosophila (SWD), Drosophila suzukii, continues to be a problem for growers of soft-skinned fruit such as blackberry, blueberry, cherry (sweet and tart), and raspberry (black and red).