Content tagged with "tree health"

Fallen Flagged Branch

Photo of fallen brown tree branch
Weakened by female periodical cicadas depositing their eggs, these brown branches fell during high winds. More

Female Cicadas Cause Branch Flagging

Photo shows female periodical cicada cutting slits along a tree branch
Female periodical cicadas make small cuts along twigs and deposit their eggs in the slits, which look like a kind of “zipper line” on the twig. Winds break the weakened twigs, and litter yards with small branches. On mature, vigorous trees, the cicada-caused wounds will heal, and branches will continue growing. More

Forest Health News

Browse up-to-date bulletins on the causes of branch flagging, insect defoliators, exotic insect and disease pests, conifer problems and current disease issues. More

Fusarium Cankers

Photo shows fusarium cankers
Fusarium cankers are elongated, larger than TCD cankers, and often visible without removing the bark. More

Jumping Oak Galls, Batman!

Leaves affected by jumping oak gall.
Missourians from St. Louis to Table Rock Lake are reporting a strange condition on the leaves of oak trees. More
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Kermes Scales on Oak

Kermes scales are not your typical-looking insects. They are tan to reddish brown spheres up to 1/4-inch diameter and attach to twigs in the oak family, especially post oaks. More

Leaves affected by jumping oak gall

Leaves affected by jumping oak gall.
Jumping oak gall leaves More

Oak Decline and the Future of Missouri’s Forests

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Drought, old age, insects and disease threaten state woodlands. More

Oak Decline in Missouri

Large numbers of northern red, southern red, black and scarlet oaks are declining and dying in southern Missouri. Find out why, and learn what you can do about it. More

Oak galls won't cause much permanent damage

This content is archived
Leaves affected by jumping oak gall.
A little TLC is all that most affected oaks need to recover. More