Wenjing Guan

Vegetable Crops Hotline Editor & Clinical Engagement Assistant Professor
Department of Horticulture and Landscape Architecture
Area(s) of Interest: Commercial Vegetable and Melon Production
Wenjing Guan's website

168 articles by this author

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The Indiana Pesticide Clean Sweep Project is a great opportunity to legally dispose of unwanted chemicals. It is free of charge up to 250 pounds. To dispose of pesticides, complete the 2018 Pesticide Clean Sweep Planning From (the form is attached to the newsletter) and mail, fax or e-mail the completed form to Garret Creason at Purdue University. 175 South University Street, West Lafayette, IN 47907-2063, (765)494-1492 (phone), (765) 494-4331 (fax) or gcreaso@purdue.edu no latter than Monday, July 30, 2018. Then bring your labeled, leak free and safe to transport containers to the collection site. Do NOT mix materials. Pesticides will be accepted from 9:00 am to 3:00 pm local time at the following dates and locations: August 14, 2018: Steuben County Fairgrounds in Angola, IN August 15, 2018: Jasper County Fairgrounds in Rensselaer, IN August 16, 2018: Henry County Fairgrounds in New Castle, IN August 21, 2018: Gibson County Fairgrounds in Princeton, IN August 22,[Read More…]


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Roger Wenning Annual Field Day Date: July 24, 2018, 9:00 am – Noon, Registration starts 8:30 am Location: Wenning Farms, 1513 N County Road 80 E, Greensburg, IN 47240         Daviess Co. Produce Production Meeting Date: Aug. 14, 2018 6:30 pm – 8:30 pm Location: Daviess Co. Produce Auction, LLC, 5567 N 900 E, Montgomery, IN 47558                                 Small Farm Education Field Day Date: Aug. 30, 2018 Location: Purdue Daniel Turf Center (1340 Cherry Lane, West Lafayette, IN 47907) and Purdue Student Farm (1491 Cherry Lane, West Lafayette, IN 47906)                             Greenhouse and Indoor Hydroponics Workshop Date: Sep. 5, 2018 Location: 625 Agriculture Mall Drive, West Lafayette, IN 47907                    [Read More…]


Does your farm often have excess produce in your growing period? We would love to connect our volunteers to come and glean that produce and put it on a plate of someone who needs this fresh food! Gleaning America’s Fields – Feeding America’s Hungry. We do it simply, effectively, and efficiently. Since 1983, Society of St. Andrew has saved fresh, nutritious produce from America’s farms – produce that otherwise go to waste – and delivered it to hunger-relief agencies. In January 2018, Society of St. Andrew (SoSA) opened a new office in Indiana. The office is based in Indianapolis but the work is throughout the state. SoSA has gleaned here in the past, but will now make a significantly larger impact across the Hoosier State. In the first year, we expect to glean about one million pounds of produce from Indiana farm fields. All of this gleaned food will be[Read More…]


Watermelon harvest is in full swing in southern Indiana. At this time, we frequently see many types of leaf symptoms. Some of them are caused by foliar diseases, such as anthracnose, Alternaria leaf blight and gummy stem blight. These diseases require special attention, normally in the form of fungicide sprays, to slow spread of the disease. However, the appearance of a moderate amount of foliar disease in mid-season doesn’t necessarily need an immediate fungicide application. Other leaf symptoms may not be caused by diseases or insects. Here are some examples of leaf symptoms that are not associated with a pathogen. It is important to correctly identify the source of the symptom to prevent unnecessarily pesticide spray. In the article When a yellow leaf is just a yellow leaf, Dr. Dan Egel discussed general rules for determining if the symptom is a disease or not. If you are not certain whether the symptom[Read More…]




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Small Farm Education Field Day Date: Aug. 30, 2018 Location: Purdue Daniel Turf Center (1340 Cherry Lane, West Lafayette, IN 47907) and Purdue Student Farm (1491 Cherry Lane, West Lafayette, IN 47906) Registration is $10. Register here http://www.cvent.com/d/hgqx6g For questions or reasonable accommodation needs, contact Lori Jolly-Brown  ljollybr@purdue.edu, (765) 494-1296.   Greenhouse and Indoor Hydroponics Workshop Date: Sep. 5, 2018 Location: 625 Agriculture Mall Drive, West Lafayette, IN 47907