Pests and Diseases
Pests and Diseases
Recommendations for managing weeds, pests and diseases in vegetables like corn, tomatoes, potatoes, onions, asparagus, squash and peppers. Tips on dealing with worms, maggots, leafminers, beetles and mites, and scouting pests with your smartphone.
Beginning vegetable farmers will learn science-based information and how to become successful.
Penn State Extension is partnering with the Pennsylvania Department of Agriculture (PDA) to provide pre-exam private pesticide applicator training in Spanish.
Lycorma delicatula, commonly known as the spotted lanternfly (SLF), is an invasive insect pest present in Pennsylvania and some other eastern states. SLF threatens grape production, tree health and it is a nuisance in landscapes.
During pumpkin harvest, be on the lookout for small white bumps on the surface of the fruit some of which may have expanded into a larger, sunken lesions or even a total collapse of the fruit.
The season is continuing to wind down and despite the variable weather conditions during the season, harvest is going well with good pumpkin crops being reports in several parts of the state.
This week's report covers basil downy mildew, late blight reported in Blair County, and the status of cucurbit down mildew in Pennsylvania.
The season is slowly starting to wind down with many growers focused on the harvest. Many of the common pests and diseases such as powdery mildew and cucumber beetles are being observed in production fields.
Alternaria leaf spot on fall-planted brassica crops, additional tomato late blight reports, and cucurbit downy mildew are concerns this week.
Weather conditions have favored the continued spread of cucurbit downy mildew locally around known sources and hosts which include jack-o-lantern pumpkin, winter squash/processing pumpkin, cucumber, and cantaloupe.
Over the past few days, there has been an increasing number of confirmed reports and suspected outbreaks of late blight.
Weather conditions have been variable across the state leading to issues with rain checking and radial cracking in tomatoes as well as blossom end rot in pepper.
Within the past couple of days, late blight resulting from natural inoculum was confirmed on both tomato and potatoes being grown at the Russell E. Larson Agricultural Research Center at Rock Springs in Centre County.
There are no new reports of late blight on either tomato or potato. Basil downy mildew was confirmed in a small planting in Centre County, PA.
Downy mildew was confirmed in a pumpkin field August 1 in northern Lancaster County, Pennsylvania.
Except for a few locations, conditions across much of the state have been hot and in general, drier.
Common diseases being observed in Pennsylvania vegetable fields include early blight and Septoria leaf spot on tomato as well as several reports of bacterial canker.
Within the past week cucurbit downy mildew was confirmed on butternut squash in southern New Jersey. This is in addition to the previous report on cucumber earlier this month.