Wenjing Guan

Vegetable Crops Hotline A newsletter for commercial vegetable growers prepared by the Purdue University Cooperative Extension Service

Wenjing Guan

Vegetable Crops Hotline Editor & Clinical Engagement Associate Professor
Department of Horticulture and Landscape Architecture
Area(s) of Interest: Commercial Vegetable and Melon Production

(812) 886-0198 guan40@purdue.edu

Wenjing Guan's website

421 articles by this author

Article List

Southern Indiana Vegetable Growers & Illiana Watermelon Accociation Winter Meeting

December 5, 2024

By: Wenjing Guan

Figure 1. Attendees at 2023 IHC (Photo by Tom Campbell).

Southern Indiana Vegetable Growers Annual Meeting will be held in conjunction with Illiana Watermelon Association Convention (IWA). The meeting will take place on January 17th in French Lick, Indiana. The [Read More…]

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Strawberry Chat Podcast — Farmer Interview with Brad Bapst: Plasticulture Production in Southern Ohio

October 17, 2024 - From Issue: 746

By: Wenjing Guan

In this episode, we travel to southern Ohio, speaking with one of the largest plasticulture strawberry growers, Mr. Brad Bapst, who shares his journey and insights on growing strawberries. We [Read More…]

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Strawberry

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Crop Culture

Unveiling Root-knot Nematodes and the Role of Suppressive Soils in Vegetable Production

September 27, 2024 - From Issue: 745

By: Wenjing Guan

What symptoms you might see: Root-knot nematodes cause swellings, known as galls, on the roots. These galled roots are less effective at taking up water and nutrients, which leads to unhealthy plants. Affected plants often exhibit aboveground symptoms resembling nutrient deficiencies, including stunted growth, yellowing leaves, and reduced vigor.

Plant-parasitic nematodes (PPN) pose a hidden threat to vegetable production, with root-knot nematodes being among the most damaging soil-borne pests. These nematodes affect a wide range of crops and have [Read More…]

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Vegetable Crops – General

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Strawberry Growers: Navigating the Challenges of Neopestalotiopsis Disease

August 29, 2024 - From Issue: 744

By: Wenjing Guan

A plasticulture strawberry field in southern Indiana.

If you’re expecting plug plants for your strawberry crops, you’ve likely heard about the emerging threat of Neopestalotiopsis disease. For those unfamiliar, I recommend reading Dr. Phil Brannen’s article, “Dramatic [Read More…]

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Strawberry

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Plant Disease Management

Recovering Vegetable Crops from Waterlogging

July 24, 2024 - From Issue: 741

By: Wenjing Guan

Figure 2. Ponding in pumpkin research at Meigs (Photo by Chloe Henscheid).

Under waterlogging conditions, oxygen depletion in the soil injures roots, limiting their ability to uptake nutrients and water. In response, plants close their stomata to prevent water loss, leading to [Read More…]

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Vegetable Crops – General

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Irrigation and Drainage

Southwest Purdue Ag Center Watermelon Variety Evaluation Open House on July 24

July 11, 2024 - From Issue: 740

By: Wenjing Guan

Dear Melon Growers and Industry Friends, You are invited to tour the watermelon variety trials conducted at Southwest Purdue Ag Center in Vincennes, IN, on July 24, 10:00 am-1:00 pm [Read More…]

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Cucurbits
- Watermelon

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Vegetable Responses to Waterlogging Stress

July 11, 2024 - From Issue: 740

By: Wenjing Guan

Figure 1. Vegetable crops’ responses to waterlogging stress.

This week, several regions of Indiana experienced excessive rainfall due to the remnants of Hurricane Beryl passing through the state. The heavy rain caused flooding in some vegetable fields. When [Read More…]

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Irrigation Workshop for Small-Scale Vegetable Producers on Sept. 4

June 28, 2024 - From Issues: 739 / 740 / 741 / 742 / 743

By: Wenjing Guan

Date: September 4, 2024 Time: 3:00 – 8:00 PM EST Location: Southwest Purdue Ag Center, 4369 N Purdue Rd, Vincennes, IN 47591 Dinner Provided Join us for an informative workshop [Read More…]

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Vegetable Crops – General

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Fruiting Vegetable Responses to Drought Stress

June 28, 2024 - From Issue: 739

By: Wenjing Guan

Figure 1. The different stages of BER on green tomatoes. The symptom is likely caused by drought stress resulted calcium deficiency.

It seems the season has shifted abruptly from wet to dry. Over the past week, we’ve begun to hear reports typically associated with hot and dry conditions. At the Southwest [Read More…]

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High Temperature Affects Fruit Set of Vegetable Crops

June 28, 2024 - From Issue: 739

By: Liz Maynard and Wenjing Guan

Figure 2. Pumpkin female flower aborted before opening (Photo by E. Maynard).

Recent high temperatures have been above optimum for vegetable crops. Around Indiana, from June 12 to 25 the daily high was more than 90°F on at least 5 days and [Read More…]

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Vegetable Crops – General

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Wenjing Guan

421 articles by this author

Article List

Southern Indiana Vegetable Growers & Illiana Watermelon Accociation Winter Meeting

Strawberry Chat Podcast — Farmer Interview with Brad Bapst: Plasticulture Production in Southern Ohio

Unveiling Root-knot Nematodes and the Role of Suppressive Soils in Vegetable Production

Strawberry Growers: Navigating the Challenges of Neopestalotiopsis Disease

Recovering Vegetable Crops from Waterlogging

Southwest Purdue Ag Center Watermelon Variety Evaluation Open House on July 24

Vegetable Responses to Waterlogging Stress

Irrigation Workshop for Small-Scale Vegetable Producers on Sept. 4

Fruiting Vegetable Responses to Drought Stress

High Temperature Affects Fruit Set of Vegetable Crops

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