1152

Acer tar spot

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Time to act
Time to act

Do not Time to act in January

Do not Time to act in February

Do not Time to act in March

Do not Time to act in April

Do not Time to act in May

Do Time to act in June

Do not Time to act in July

Do not Time to act in August

Do not Time to act in September

Do not Time to act in October

Do not Time to act in November

Do not Time to act in December

The fungus Rhytisma acerinum overwinters on fallen acer leaves, then infects the new spring foliage. The first signs are yellow leaf spots that turn into large shiny black blotches up to 1.5cm across. Severe cases can mean the leaves drop early, but the health of the tree won’t suffer.

Advertisement

Symptoms

An outbreak of shiny black blotches, edged in a ring of yellow, disfigure acer leaves in early summer. This can lead them to fall prematurely.

Find it on

acers

Advertisement

Organic

Rake up and dispose of all fallen infected leaves.