Plant Fungal Diseases

Tar spot is a new foliar fungal disease of corn first discovered in the United States in 2015 and confirmed in Maryland in 2022 and was estimated to be the most significant yield-limiting disease of corn in the US in 2021 and 2022. As a new disease for our state, this project collected preliminary data on the distribution of tar spot in our state and compared the efficacy of different fungicide application timings.

Fruit and Vegetable News, Volume 13, Issue 1 (April, 2022). Topic in this issue are: Check for Allium leaf miner in onions and leeks over the next few weeks, Edema problem in high tunnel tomatoes, Using Plant Growth Regulators to Improve Apple Return Bloom, Botryis Fruit Rot (Gray Mold) and Crown Rot in Strawberries, Spring Pest Scouting in Strawberries, and Early Spring Vegetable Insect Scouting Tips.

Overview of Fungicides for Head Scab Control in Wheat

Botrytis in High Tunnel Tomatoes

A County agent sent pictures of squash that were turning yellow and wilting (fig. 1). This was found to be Fusarium crown rot caused by the fungus Fusarium solani f. sp. cucurbitae with a little Anthracnose caused by Colletotrichum orbiculare mixed in with it. In the field, Fusarium crown rot is generally a problem in summer and winter squash, and some pumpkin cultivars, but most cucurbits have been found to be susceptible.

Tar spot is a disease of corn caused by the fungus Phyllachora maydis.

Agronomy Newsletter -June 2024, Volume 15, Issue 3. Topics include: State Court of Appeals Overturns Circuit Court’s Right-to-Farm Decision, Thoughts on Tar Spot Management, Scouting for Fusarium Head Blight, Paraquat Training Opportunities, June IPM Insect Scouting Tips, UMD Faculty Member Partners Nationally to Release Highly Anticipated Decision Aid Tool to Produce Maximum Crop Yield, New Forage Enterprise Budgets, Fungicide Efficacy Tables for Corn and Soybean, Weather Outlook, and Maryland Regional Crop Reports.

Black dot root rot found in high tunnel tomatoes

2023 Maryland Soybean Fungicide Trial results

Southern Blight Problem in Peppers