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QUESTION: Tiny reddish-orange specks crawling on cement block and rock, what are they?

comments (0) July 5th, 2012

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10shoe 10shoe, member
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I bought some large Noyo rock (football size) and some cement retaining wall block. It's stacked and piled on a cement pad. I noticed tiny pin prick size reddish orange specks crawling all over them and wondered what these critters are and whether they are harmful. If so, how do I kill them before incorporating these landscape materials into my garden? I prefer to use less toxic applications. I recently read an article on chiggers and wondered if these could be them. I live in Northern CA, interior East Bay valley where we get hot dry summers and cold winters, zone 9. Humidity is usually pretty low.

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