pear tree questio - Ask Extension
hello, I have a bartlet pear tree that i believe is over 20 years old its in a field on our property which is about 5 acres in full sun not near any ...
Knowledgebase
pear tree questio #830528
Asked May 17, 2023, 11:39 AM EDT
hello, I have a bartlet pear tree that i believe is over 20 years old its in a field on our property which is about 5 acres in full sun not near any structures or other tress. I pruned the tree last year as it had a lot of "suckers" after attending a clinic at white house fruit farm. i noticed about 5 days ago there are red blotched on some of the leaves on the tree not all of them. And the tree did flower and has tiny little pears so overall looks pretty healthy. any help you can give me as to what it is or how to treat it would be greatly appreciated.
thank you so much maggie moracco
Mahoning County Ohio
Expert Response
From the pictures it looks like it my be Entomosporium leaf spot, which is caused by the fungus Entomosporium maculatum
Reddish-purple leaf spots enlarge to create a general reddening and blight of the foliage. If untreated, this may be followed by leaf-drop. The fungus is most active during fall and spring months when weather is cool and rainy.
Apply a recommended fungicide at the first sign of disease or when new growth starts, and repeat application every 7 to 14 days. Be sure to follow the directions on the label. However, the use of fungicides for management of Entomosporium leaf spot is most effective when initiated early at new leaf emergence, and continued regularly until leaves become mature in early June. Then, applications should be made when conditions favor disease development (immediately following rainy periods). Fungicides should not be applied during hot, dry periods.
Fungicides labeled for Entomosporium leaf spot control contain one of the three active ingredients:
Chlorothalonil or Propiconazole or Myclobutanil
Following is a link to the Univ of Georgia Extension site with more info: https://newswire.caes.uga.edu/story/4768/leaf-spot-disease.html
To be sure, you can send a sample to the OSU Plant Diagnostic Clinic https://ppdc.osu.edu/submit-sample
Reddish-purple leaf spots enlarge to create a general reddening and blight of the foliage. If untreated, this may be followed by leaf-drop. The fungus is most active during fall and spring months when weather is cool and rainy.
Apply a recommended fungicide at the first sign of disease or when new growth starts, and repeat application every 7 to 14 days. Be sure to follow the directions on the label. However, the use of fungicides for management of Entomosporium leaf spot is most effective when initiated early at new leaf emergence, and continued regularly until leaves become mature in early June. Then, applications should be made when conditions favor disease development (immediately following rainy periods). Fungicides should not be applied during hot, dry periods.
Fungicides labeled for Entomosporium leaf spot control contain one of the three active ingredients:
Chlorothalonil or Propiconazole or Myclobutanil
Following is a link to the Univ of Georgia Extension site with more info: https://newswire.caes.uga.edu/story/4768/leaf-spot-disease.html
To be sure, you can send a sample to the OSU Plant Diagnostic Clinic https://ppdc.osu.edu/submit-sample
