Green Industry - A Knowledge Portal for Commercial Horticulture in Wisconsin (sponsored by University of Wisconsin-Extension)
Diagnostics - Problem Details
Anthracnose (herbaceous) - Several
Damage
Symptoms typically appear as tan to brown spots or sunken lesions that may combine to form irregular, dark lesions that cause rapid blighting of leaves or stems. Depending on the fungus species and host plant species, foliage may also distort, turn yellow, wilt, drop prematurely or die. This may cause signficant plant losses if not diagnosed in the early stages of infection. Under wet conditions, these diseases can have multiple infection cycles during the growing season. Anthracnose fungi persist primarily in infected plant parts and crop debris.
Cultural Controls
Anthracnose spores are spread readily by watersplash on nearby succulent growth. To control Anthracnose, pasteurize growing media before planting. Use seed, or plant stock that is pathogen-free, or use treated seed. Avoid overhead watering and keep foliage dry. Practice good sanitation. Promptly remove and dispose of crop debris and diseased tissue.
Remarks
Chemical controls may be necessary in commercial production situations. However, once an infection has begun, curative treatments are ineffective. Preventative applications should be used when appropriate.
Chemical Controls
- Azoxystrobin
- Signal Word: Caution
Pesticide Class: Systemic-Upward only - Boscalid+Pyraclostrobin
- Signal Word: Caution
Pesticide Class: Local Protectant - Chlorothalonil
- Signal Word: Warning
Pesticide Class: Protectant - Chlorothalonil+Thiophanate methyl
- Signal Word: Danger
Pesticide Class: Protectant, Systemic-Upward only - Copper
- Signal Word: Caution
Pesticide Class: Protectant - Iprodione
- Signal Word: Caution
Pesticide Class: Local protectant - Iprodione+Thiophanate-methyl
- Signal Word: Caution
Pesticide Class: Local Protectant, Systemic-upward only - Kresoxim-methyl
- Signal Word: Caution
Pesticide Class: Local protectant - Mancozeb
- Signal Word: Caution
Pesticide Class: Protectant - Polyoxin-D Zinc Salt
- Signal Word: Caution
Pesticide Class: Local protectant - Pyraclostrobin
- Signal Word: Caution
Pesticide Class: Local protectant - Tebuconazole
- Signal Word: Caution
Pesticide Class: Systemic-upward only - Thiophanate-methyl
- Signal Word: Caution
Pesticide Class: Systemic-upward only - Trifloxystrobin
- Signal Word: Caution
Pesticide Class: Local protectant
Locations Affected
Plant Environment
Scouting Season:
January - Early , January - Mid , January - Late , February - Early , February - Mid , February - Late , March - Early , March - Mid , March - Late , April - Early , April - Mid , April - Late , May - Early , May - Mid , May - Late , June - Early , June - Mid , June - Late , July - Early , July - Mid , July - Late , August - Early , August - Mid , August - Late , September - Early , September - Mid , September - Late , October - Early , October - Mid , October - Late , November - Early , November - Mid , November - Late , December - Early , December - Mid , December - Late
Plants Affected
Photos
Anthracnose on Liriope (lilyturf)
Anthracnose on ivy (Hedera)
Anthracnose on grape (Vitis)