blue stain

American  

noun

Plant Pathology.

1. a serious fungal disease of certain trees that reduces the economic value of the timber, caused by various species of the genus Ceratocystis.

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blue stain British  

noun

1. forestry a bluish discoloration of sapwood caused by growth of fungi

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Example Sentences

A blue stain fungus carried in by the pests delivers the coup de grace — a clogged circulatory system.

From Los Angeles Times

The same is true for blue mushrooms like the indigo milky cap and other species that develop a blue stain when disturbed.

From Washington Post

Blue stain, brought about by fungi, can set in within about a month, and ruin saw logs.

From The Wall Street Journal

Inside, Mr. Tarafdar sprayed the raw concrete floor with blue stain to give it a “flooded” look.

From The Wall Street Journal

Immunoblotting with pSer/Thr antibody shows the level of pSRC-3 protein. c, Coomassie blue stain showing the levels of GST-fused SRC-3 fragments used in in vitro kinase reactions performed in Fig. 2b. d, Proteomics analysis of in vitro kinase assay using the GST–SRC-3-CID fragment in the presence of PFKFB4 enzyme and ATP followed by mass spectrometric analyses.

From Nature