Follow UMaine on Twitter | Join UMaine on Facebook | Watch UMaine on YouTube | Admissions | Parents & Family | Apply to UMaine | Give Now | Emergency
UMaine Extension: Insect Pests & Plant Diseases
Site Navigation:
- UMaine Extension: Insect Pests & Plant Diseases Home
- Insect and Plant Disease Diagnostic Lab
- Maine Integrated Pest Management (IPM) Programs
- Pesticide Safety Education Program
- News & Events
- Staff
- Contact Us
Plant Disease Images - Alder – Ascochyta Leaf Spot Pathogen
Ascochyta sp.
- Pycnidium
- Pycnidium cross section
- Pycnidium cross section
- Pycnidium cross section
- Floor of pycnidium
- Neck of pycnidium
- Conidia
Image Description: Pycnidium
Image Description: Pycnidium cross section
Image Description: Pycnidium cross section
Image Description: Pycnidium cross section
Image Description: Floor of pycnidium
Image Description: Neck of pycnidium
Image Description: Conidia
Print This Page
Sidebar
Contact Information
UMaine Extension: Insect Pests & Plant Diseases491 College Avenue
Orono, Maine 04473-1295
Phone: 207.581.3880, 800.287.0279 (in Maine) or 800.287.8957 (TDD)E-mail: extension@maine.edu