IDENTIFICATION OF A STRAIN OF TOBACCO RINGSPOT VIRUS CAUSING A DISEASE OF IMPATIENS IN COMMERCIAL GREENHOUSESCOCKHART BE; PFLEGER FL.1979; PLANT DIS. REPORTER; USA; DA. 1979; VOL. 63; NO 4; PP. 258-261; BIBL. 12 REF.Article

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FIELD RESISTANCE TO PSEUDOPEZIZA MEDICAGINIS IN MEDICAGO SPP = RESISTANCE EN PLEIN CHAMP A P. M. CHEZ LA LUZERNEPFLEGER FL; DOLAN DD.1973; PLANT DIS. REPORTER; U.S.A.; DA. 1973; VOL. 57; NO 5; PP. 468-471; BIBL. 15 REF.Serial Issue

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