The first symptoms of cucurbit downy mildew (Pseudoperonospora cubensis) on cucumber plants in a commercial field were confirmed in LaGrange County, Indiana, on July 29, 2026. Now is a good time to stay alert and scout fields for symptoms related to this disease. Remember, early detection of this pathogen is key to implementing appropriate management strategies. This disease…Read more about Downy Mildew Symptoms Confirmed in Indiana[Read More]
Cucurbits
Originally published on: July 25, 2025 Fruit cracking is one of the most commonly observed disorders affecting many fruit crops. Cracking can occur in different forms, such as radial splits extending from the stem end, splits at the blossom end, or concentric rings around the fruit. Research has shown that multiple factors influence fruit cracking….Read more about What Caused the Cracking of Tomatoes and Melons?[Read More]
You are invited to attend the SWPAC Vegetable Field Day on August 13, 2026, at the Southwest Purdue Agricultural Center (SWPAC) in Vincennes, Indiana. PARP credits will be offered at this event. This free educational event will provide an opportunity to learn about the latest research and Extension programs that support Indiana’s vegetable industry. Participants…Read more about Southwest Purdue Agriculture Center Vegetable Field Day – August 13[Read More]
Have you taken a close look at pumpkin or squash fields recently? In June and early July, pumpkin plantings at Pinney Purdue Ag Center in Northwest Indiana, the following insects were observed this week. See the Midwest Vegetable Production Guide for management recommendations. Squash Bee Squash bees collecting nectar from a female pumpkin flower. These…Read more about Pumpkin Insect Observations[Read More]
As we move through the growing season, several foliar diseases continue to be observed in watermelon fields across Indiana. The most common diseases this year have been Alternaria leaf blight and gummy stem blight, while anthracnose has been detected less frequently than in previous seasons. Because these diseases can cause similar symptoms in the field,…Read more about Common Foliar Diseases Observed in Indiana Watermelon Fields This Season[Read More]
Days ago, the Office of the Indiana State Chemist (OISC) approved expanded label language allowing an over-the-top application of Dual Magnum® herbicide on pumpkins in Indiana. This change follows extensive research conducted in 2021 across 11 sites in 10 states to confirm jack-o’-lantern pumpkin crop tolerance to this application. Full results from that research can…Read more about Dual Magnum® Herbicide Now Labeled Over-The-Top in Indiana Pumpkins[Read More]
In this article, we discuss another plant nutrient imbalance symptom commonly observed in melon production in southern Indiana: manganese toxicity. Manganese is an essential plant nutrient, but excessive amounts can cause toxic effects. In melons, manganese toxicity usually appears as chlorotic spots made up of many tiny pinhole-like lesions that gradually merge together (Figure 1)….Read more about Melon Nutrient Imbalance – Manganese Toxicity[Read More]
In the next two articles, we discuss two nutrient imbalances in melons commonly observed in southern Indiana: potassium deficiency and manganese toxicity. We will describe the symptoms, field observations, potential factors contributing to their occurrence, and potential remedies. Potassium Deficiency A typical symptom of potassium deficiency in melons is yellowing along the margins of older…Read more about Melon Nutrient Imbalances – Potassium Deficiency[Read More]
We have received heavy rainfall in recent days across several parts of Indiana. These conditions, combined with the current growth stage of melons (for example, the dense canopy resulting from active vegetative growth) can create favorable conditions for disease development. Diseases that may become problematic under these conditions include gummy stem blight and anthracnose (Figures…Read more about Wet Weather Increases Disease Risk in Cucurbits[Read More]
As of January 1, 2025, Chateau® SW herbicide is no longer registered for use in melon crops in the state of Indiana. While some growers are aware of this development, others are not. The following article discusses the background on Chateau® SW use in melons and addresses some questions growers may have. What is Chateau®…Read more about Chateau® SW Herbicide No Longer Registered for Melons in Indiana[Read More]