By Blake Jackson
Neopestalotiopsis is a fungal disease that has been affecting strawberry plants in Pennsylvania and the Mid-Atlantic region. While it can initially appear on the leaves, the disease can also spread to the crown and roots, leading to plant death. Here's how to identify and control this harmful pathogen:
Rapid Disease Progression: One of the key characteristics of Neopestalotiopsis is its rapid spread during warm, wet conditions. Large portions of infected leaves can be affected within a few days. This rapid invasion distinguishes it from other foliar diseases, which typically progress more slowly.
Pycnidia Formation: If you place infected leaves in a plastic bag with a wet paper towel, you'll notice the development of black pycnidia within a few days. These tiny, black pimples are a distinctive feature of Neopestalotiopsis. While other diseases may also produce pycnidia, they are usually fewer and take longer to appear.
Spore Tendrils: In a few more days, tendrils of black spores will emerge from the pycnidia. These delicate tendrils can be seen with a magnifying glass and can easily break off. They can also spread the disease to other plants.
Disease Control: While the disease progression may slow down during the winter in northern regions, plants with infected crowns may not survive. Thiram and Switch are effective fungicides for controlling Neopestalotiopsis.
Matted-Row Growers: It's important to note that Neopestalotiopsis has not yet been found on the plant material used in matted-row plantings. However, as the disease continues to spread, it's possible that it may eventually affect these plants as well.
By carefully observing the symptoms and following the appropriate control measures, strawberry growers can help prevent the spread of Neopestalotiopsis and protect their crops.
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Categories: Pennsylvania, Crops, Fruits and Vegetables