EFIKASI BAKTERI ANTAGONIS TERHADAP PERKEMBANGAN PENYAKIT AKAR PUTIH PADA KARET (Hevea brasiliensis Muell Arg) = EFFICACY Of ANTAGONISTIC BACTERIA AGAINST The DEVELOPMENTS Of WHITE ROOT DISEASE In RUBBER PLANTS (Hevea brasiliensis Muell Arg) - SUKRON, MUHAMMAD (2018)