Fungi & diseases - Plant Pests

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Spruce Needle Rust

Spruce needle rust; this fungus is on the needles of spruce trees one half of the year and the other half on plants of the heather family. Continue reading

Stem nematode

Threadlike and colorless roundworms cause deformed leaves. Continue reading

Stemphylium vesicarium

Stemphylium vesicarium is a widespread fungal disease. This fungal disease causes various diseases in different host plants.
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Tar spot

Tar spot is a fungal leaf spot disease of sycamore and some other Acer species.
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ToBRFV

Tomato Brown Rugose Fruit Virus (ToBRFV) is related to tomato mosaic virus (TMV) and tobacco mosaic virus (ToMV). Continue reading

Tongues of Fire

Tongues of Fire lives on pear trees and junipers, among others.
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Tulip rot

Tulip rot is a rarely observed fungus that affects tulips, onion varieties and fritillaries.
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Verticillium wilt

Verticillium wilt belongs to the soil fungi that causes wilt in greenhouses and on wet soils.
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Violet Bramble Rust

Violet Bramble Rust, this rust fungus thrives on blackberries in wet and cool summers.
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Walnut anthracnose

Walnut anthracnose; this fungus causes yellow, later dark brown spots on the leaves, petioles and walnuts.
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