Late blight has now been confirmed in 10 counties in New York as well as in Ontario Canada, Connecticut, New Jersey, Maryland and in one county in Pennsylvania (on potato). Reports have been on both tomato and potato.
In Pennsylvania downy mildew has now been confirmed on cucumber in Lawrence, Elk and Berks Counties, on butternut squash in Lancaster and Columbia Counties and on jack-o-lantern type pumpkin in Clinton County.
Tomato hornworms on your tomato plants can be a problem from July through early September in Pennsylvania. This pest is not a big problem and for that reason it can be overlooked; however if populations explode you can rapidly see a lot of damage to the plants and fruit.
This afternoon downy mildew was confirmed on pumpkin growing on a commercial farm in Clinton County. This is the first report on pumpkin in the region.
Most sites continue to report very low counts, but a 2nd generation of ECB has started, sites in western and central PA reported FAW, sap beetles have emerged in some southeastern sites, and Western bean cutworm (WBC) flights have started. Inspect silks for sap beetles.
The late blight samples collected from the commercial potato field and potato cull pile in Erie Co., PA have been genotyped as US-23. The predominant genotype observed infecting both potato and tomato over the past several years.
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.