Definition of "noysome"

The rampant Lyon hunts he fast , With dogges of noysome breath

1590, Edmund Spenser, “(please specify the book)”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie

There swimmeth also in the Sea, a round slymie substance, called a Blobber, reputed noysome to the fish.

1609, Richard Carew, The Survey of Cornwall. […], new edition, London: […] B. Law, […]; Penzance, Cornwall: J. Hewett, published 1769