Dear Valued VCH Readers,
Welcome to this week’s edition of the Vegetable Crops Hotline!
As summer heat continues to challenge Indiana growers, this week’s edition provides essential guidance for managing the intensifying conditions ahead. With more heat waves expected and reference evapotranspiration significantly exceeding precipitation, it’s crucial to stay vigilant about drought-related impacts while addressing the immediate pest and disease pressures that thrive in these conditions.
This issue addresses the multifaceted challenges currently facing vegetable producers. For small-scale and organic growers struggling with persistent weed problems, we offer practical alternatives to hand-weeding and tillage through our comprehensive guide to weed management methods. These methods include silage tarping, flame-weeding, organic herbicides, and handheld cultivation tools that can be integrated into existing production systems. Meanwhile, cucurbit growers must be on high alert, as multiple foliar pathogens—gummy stem blight, anthracnose, and Phytophthora blight—are appearing in watermelon and cantaloupe crops, making continued or preventive fungicide applications crucial.
The insect front brings mixed news from our statewide trapping networks. While squash vine borer activity is declining from the first generation and corn earworm counts have dropped dramatically in most areas, Japanese beetles are making their familiar and destructive appearance, particularly threatening roses and other ornamental plants with their characteristic leaf skeletonization. Our trapping updates reveal that most locations are now below spray thresholds for corn earworm, presenting an opportunity to conserve natural enemies and prevent secondary aphid outbreaks.
Looking beyond immediate field concerns, we’re excited to highlight educational and market opportunities that can enhance your operation. Mark your calendars for the upcoming Small Farm Education Field Day, which promises valuable insights for small-scale farmers and urban growers across Indiana, and discover new market opportunities with the launch of a farmers market in Gary, expanding access for both producers and consumers in northwest Indiana. Whether you’re battling weeds with innovative tools, timing disease management programs, or exploring new marketing channels, this week’s content provides the research-backed strategies and timely updates needed to navigate these challenging but opportunity-rich summer conditions.
Growers and Purdue Extension Educators
Your input and expertise make this newsletter a truly useful resource. If you have hot topics you’d like us to cover, success stories to share, or questions for our Extension specialists, please get in touch with us at plangenh@purdue.edu or contact the specialist directly. We also welcome high-quality photos of pest issues, unusual symptoms, or innovative production practices you’ve implemented on your farm.
Website Links in Newsletter Articles
We frequently include links to websites or online publications. If you are unable to access these resources, please don’t hesitate to contact your local Purdue Extension office or us to request a hard copy of the information.
Midwest Vegetable Production Guide
The 2025 Midwest Vegetable Production guide is now available for growers to visit online at mwveguide.org, or you can download and print a guide from your computer at mwveguide.org/guide. The guide can also be purchased for $15 per copy. Contact your Extension Office or Stephen Meyers (slmeyeres@purdue.edu) directly to buy a copy.
Midwest Vegetable Trial Reports
Are you still considering purchasing vegetable seeds? The Midwest Vegetable Trial Reports feature many articles to help you make an informed decision. The resource also hosts research results related to production.
Best regards,
Petrus Langenhoven
Clinical Assistant Professor and Vegetable Extension Specialist
Department of Horticulture and Landscape Architecture
Purdue University