Latest Pest and Disease Information

This weekly report, last updated September 24, 2025, provides statewide trap catches and timely management recommendations for key pests of sweet corn.

Adult allium leafminers were spotted on September 15, 2025, in Manheim, PA, marking the start of the fall flight.

We are approaching the time when allium leafminer will become active in PA and growers need to start now to prepare for this pest.

For growers, late fall and early winter is the time to recharge personal batteries, develop cropping plans for the next year, or attend educational meetings to expand knowledge.

Diminutive but destructive are two terms that describe flea beetles with respect to cole crop production systems.

Striped cucumber beetles overwinter as adults in crop debris and become active in the spring as soon as cucurbit crops are planted in the field.

Colorado potato beetles are perhaps the most common and potentially destructive potato pest in the U.S.

Growing up in Maryland, pickled red beets were a staple at every family dinner gathering.

While Alternaria leaf blight can infect other cucurbit crops like cucumber, watermelon, and squash, it tends to be more virulent on cantaloupes than on other cucurbits.

Researchers at Penn State are asking growers for help identifying bacterial diseases of arugula and other crops in Pennsylvania vegetable production systems.

Thrips parvispinus is an invasive insect that can cause significant damage to various plants and agricultural crops.

Resistance issues, government bans, and supply chain issues can make finding the right spray daunting.

Center rot causes significant economic loss to the onion bulb industry in the United States.

Although there are many species of sap beetles, only some become pests in agricultural crops.

Sweet corn is one of Pennsylvania's most important crops for fresh market producers.

It’s the time of year when you may see tomato or tobacco hornworms on your tomato plants. They can be a problem from July through early September in Pennsylvania.