Black Spot

The characteristic black spots on infected leaves are patches of fungus, not dead tissue. The organism attacks only roses; it survives on canes and fallen leaves, then spreads easily during misty, foggy, or rainy weather. Black spot is common in regions where summer weather is warm and humid.

Target:

Roses. 

Damage:

Roughly circular black spots with ragged yellowish borders appear on leaves. In severe cases, defoliation occurs. 

Control:

Fungicides, disease control 

Notes:

Water early in the day; avoid working among wet plants. Remove and destroy infected leaves.

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