i have squash seedlings about 3″to 4″ high.they are covered with these little bugs that look like ground black pepper on them. could you tell me what hey are and are they harmful and if they are, how do i get rid of them?

From your description it sounds like you have some black aphids although, without a picture I’m just making an educated guess. Aphids are easily killed with insecticidal soap. Here’s a link that might help you figure out exactly what you have. http://www.clemson.edu/extension/hgic/pests/plant_pests/veg_fruit/hgic2207.html

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