Very strange indeed! The description of the symptoms does not ring a bell. White on pea leaves may be powdery mildew. The black substance may be sooty mold growing on some sugars substance, perhaps a sign of aphids and the honeydew they secrete. The lines in the leaves that appear as vacuoles may be leaf miners, an insect that does not need to be treated for since it does little damage in most cases. The black rod-like structures are a bit of a mystery.
For a hands-on diagnosis I suggest you take a sample to your local Extension Office (phone 803-649-6671).
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