John Bonkowski – Vegetable Crops Hotline
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John Bonkowski

jbonkows@purdue.edu

2 articles by this author

Article List

Buckeye Rot of Tomato

August 8, 2025 - From Issue: 759
By: John Bonkowski
Figure 1: Caption: Roma tomatoes with buckeye rot caused by Phytophthora (Photo by John Bonkowski).
Read More

Over the last few weeks, we have received multiple tomato samples at the Purdue Plant and Pest Diagnostic Lab with buckeye rot of the fruit. This is likely due to[Read More…]

 Article Categories:
  • Solanaceous Crops
    • Tomato
 Article Tags:
  • Disease Watch

Anthracnose of Garlic a New Disease to Indiana

July 22, 2019 - From Issue: 662
By: Dan Egel, Tom Creswell, John Bonkowski and Michael J O'Donnell
Anthracnose of garlic, a new disease to Indiana, may cause sunken, orange lesions on scapes.
Read More

Earlier this summer, sunken lesions were observed on garlic scapes on a small farm in east central Indiana. Lesions started out a cream or tan color (Figure 1), however under[Read More…]

 Article Categories:
  • Root, Tuber, and Bulb Crops
    • Garlic
 Article Tags:
  • Plant Disease Management

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