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๐ฃ๐ฟ๐ผ๐๐ฒ๐ฐ๐ ๐ฌ๐ผ๐๐ฟ ๐๐ผ๐ด๐๐ผ๐ผ๐ฑ ๐ง๐ฟ๐ฒ๐ฒ๐: ๐๐ฑ๐ฒ๐ป๐๐ถ๐ณ๐๐ถ๐ป๐ด ๐ฎ๐ป๐ฑ ๐๐ผ๐บ๐ฏ๐ฎ๐๐ถ๐ป๐ด ๐๐ป๐๐ต๐ฟ๐ฎ๐ฐ๐ป๐ผ๐๐ฒ ๐๐ถ๐๐ฒ๐ฎ๐๐ฒ
Lumberjacks Tree Service
Dogwood anthracnose is a hazardous threat to dogwood species, including the beloved native flowering dogwood and Pacific dogwood trees. Introduced from Asia in the late 1970s, this fungal pathogen, Discula destructiva, has destroyed natural populations of flowering dogwood.
๐๐บ๐ฎ๐ฑ๐ต๐ฐ๐ฎ๐ด ๐ฐ๐ง ๐๐ฐ๐จ๐ธ๐ฐ๐ฐ๐ฅ ๐๐ฏ๐ต๐ฉ๐ณ๐ข๐ค๐ฏ๐ฐ๐ด๐ฆ:
– Tan spots with irregular purple margins on leaves, which progress upwards if cool, wet weather persists.
– Brown blotches on leaves, causing scorch or blight, often spreading into the petiole and infecting the shoot.
– Sunken tan to brown spots with purple borders on twigs, which can girdle the twig and result in twig dieback.
– Blighting of terminal leaves, leading to death of terminal buds and reduced spring budbreak.
๐๐ช๐ด๐ฆ๐ข๐ด๐ฆ ๐๐บ๐ค๐ญ๐ฆ:
– Persisting as cankers on trunks and branches, the fungus produces large amounts of spores spread by rain, insects, or birds in cool, moist weather.
– Conidia (spores produced by fungi) formed on cankers are splashed by rain onto newly expanded leaves, flowers, and succulent tissues, initiating new infections.
๐๐ช๐ด๐ฆ๐ข๐ด๐ฆ ๐๐ข๐ฏ๐ข๐จ๐ฆ๐ฎ๐ฆ๐ฏ๐ต:
– Cultural and chemical controls are crucial. Pruning infected parts removes the infection source, while maintaining tree health through adequate watering, mulching, and use of resistant cultivars is essential.
– Fertilizing young dogwood trees should be avoided in the first year and done cautiously thereafter, ensuring the right ratio and timing.
– Registered fungicides can help reduce new infections, but treatments will not cure existing ones. Apply treatments three to four times at 14-day intervals starting at bud break.
If you feel your dogwoods are in danger, contact us today for expert advice. We will provide you with a free Tree Risk Assessment and information about our tree health care program. Now is the time to protect your dogwood trees from anthracnose!
Note: The information provided is a condensed summary and should not be considered a substitute for professional advice and treatment.
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Dogwood anthracnose is a hazardous threat to dogwood species, including the beloved native flowering dogwood and Pacific dogwood trees. Introduced from Asia in the late 1970s, this fungal pathogen, Discula destructiva, has destroyed natural populations of flowering dogwood. ๐๐บ๐ฎ๐ฑ๐ต๐ฐ๐ฎ๐ด ๐ฐ๐ง ๐๐ฐ๐จ๐ธ๐ฐ๐ฐ๐ฅ ๐๐ฏ๐ต๐ฉ๐ณ๐ข๐ค๐ฏ๐ฐ๐ด๐ฆ: – Tan spots with irregular purple margins on leaves, which progress upwards […]
