Photinia Leaf spots – Entomosporium mespili
by Patti Nigh - February 15th, 2010.Filed under: Etc.. Tagged as: Plant Health Care.
Photinia Leaf spots
Entomosporium mespili
Entomosporium is a fungal disease that spots the leaves of plants in rose family, including apple, crab apple, hawthorn, pear, photinia, pyracantha, quince, and Rhaphiolepis. In the Willamette Valley, we see rampant problems on our Photinia. This disease is more than unsightly; heavy infections will cause defoliation, and death of the infected plant.
This fungus overwinters in infected leaves from the previous year. In the spring the fungul spores are released and are dispersed to healthy, young tissue. In the beginning, small reddish spots appear on the leaves of infected plants. These spots darken and enlarge as the leaves mature. The infection presents mostly on the leaf blades, and may be found on petioles and young shoots, in instances of severe infection.
Controls to decrease the severty of this disease:
1 Remove and destroy fallen leaves in the fall and winter.
2.Only take cuttings from healthy, uninfected plants.
3.Try to space plants far enough apart to provide good air circulation
4.Prune the bottom to provide good air circulation.
5.Prune in the late fall or early spring, and avoid frequent pruning.
6.Avoid summer fertilization, to make sure no new, early growth will appear and become infected.
7.Manage irrigation during dry times to avoid wetting the leaves.
8.Soft chemical control is needed in addition to the manual controls.
The technicians at True Care Inc. are very well versed in the care and treatment of Entomosporium on your valuable plants.. Give us a call today to have a free estimate on treating photinia, or any of the other plants this disease attacks.
503-678-5388
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