ABSTRAK Penyakit virus cabai masih sukar diatasi sehingga perlu dikaji penggunaan Pseudomonas fluorescens P60. Penelitian ini bertujuan menentukan formula cair. P. fluorescens P60 terhadap penyakit virus pada tanaman cabai serta pengaruhnya terhadap pertumbuhan dan hasil tanaman cabai merah. Penelitian disusun menggunakan rancangan acak kelompok dengan 7 perlakuan dan 4 ulangan, meliputi kontrol, aplikasi insektisida, penyiraman bibit dan penyemprotan P. fluorescens P60 sebanyak 1, 2, 3, 5, dan

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... 7 kali. Hasil penelitian menunjukkan bahwa penyiraman dan penyemprotan P. fluorescens P60 5 kali mampu menekan penyakit virus pada tanaman cabai merah dengan menurunkan intensitas penyakit sebesar 73.37%, meningkatkan kepadatan populasi akhir P. fluorescens P60 sebanyak 9.50 x 10 11 dan kandungan fenol (saponin, tanin, dan glikosida). Penyiraman dan penyemprotan P. fluorescens P60 5 kali mampu meningkatkan pertumbuhan dan hasil tanaman cabai merah dengan meningkatkan tinggi tanaman 23.7%, panjang akar 6.44%, bobot kering tanaman 66.68%, bobot kering akar 23.59%, dan bobot hasil 53.157%. Kata kunci: bakteri antagonis, ketahanan sistemik, senyawa fenol ABSTRACT Viral diseases of chilli pepper are difficult to control, therefore the use of Pseudomonas fluorescens P60 should be evaluated. The aims of this research were to determine the influence of liquid formula of P. fluorescens P60 on virod disease and on growth and yield of chili pepper. Randomized block design (RBD) experiment was composed of 7 treatments and 4 replicates, i.e., control, insecticide applicaton, P. fluorescens P60 application by seedling drenching and spraying for 1, 2, 3, 5, and 7 times. The result showed that 5 times application of P. fluorescens P60 by drenching and spraying was able to suppress viral disease and reduce disease intensity by to 73.37%, increasing density level of P. fluorescens P60 to 9.50 x 10 11 and increase phenolic compounds (saponin, tannin and glycoside). The same treatment could increase plant height 23.7%, root lenght 6.44%, plant dry weight 66.68%, root dry weight 23.59%, and yield weight 53.16%.