You may notice these dark lesions on trees, fruits and vegetables. This condition is known as Anthracnose which is a blanket term for a variety of fungi and bacteria that cause similar symptoms.
To help manage this it is important to remove any fallen debris. Also avoid watering with a sprinkler, you don't want to help the fungal spores/bacteria spread. Instead focus on watering at ground level (see "Wet My Whistle").
When it comes to fungicide sprays, it's best to apply a copper-based spray, which should be applied at Springtime leaf out.