Sentence:  Treatment of the conjugates with ethyl acetate , and the conjugates ( which had been passed through Dowex-2-chloride ) with mouse liver powder , sweet clover <WSD>crown</WSD> gall tissue powder , or healthy sweet clover proteins did not satisfactorily remove nonspecifically staining substances in the conjugates . 
Meaning of the word marked with <WSD> tags:  a bacterial disease of plants (especially pome and stone fruits and grapes and roses) which forms excrescences on the stem near the ground