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Abstract
Plant Growth Promoting Rhizobacteria (PGPR) plus manure technology is designed to control the vascular streak dieback disease (VSD) which attacks cocoa plants, and improve the plant growth. This research aims to compare the cost of using conventional manure and PGPR plus manure technology. This research was designed in a descriptive quantitative approach using cencus data of 43 people who use PGPR plus manure in Kabupaten Limapuluh Kota. The result shows that the conventional fertilizer costs is more expensive than the PGPR plus manure formula. Therefore, it PGPR plus manure formula is recommended for the cacao farmers in Kabupaten Limapuluh Kota.
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Copyright (c) 2020 Sri Wahyuni, Haliatur Rahma, Jumsu Trisno, Martinius Martinius, Rita Noveriza, Sri Yuliani, Nusyirwan Nusyirwan, Jhon Nefri

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References
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References
David I. 2018. Cacao diseases: vascular-streak dieback. E-Chapter: Achieving Sustainable Cultivation in Cocoa. Burleigh Dodds Science Publishing.
Cambridge, UK, 2018, (ISBN: 978 1 78676 168 2;
www.bdspublishing.com)
Direktorat Jenderal Perkebunan. 2016. Statistik Perkebunan Indonesia (Tree Crop Estate Statistics of Indonesia). 2015 – 2017 Kakao (Cocoa). Diterbitkan oleh Sekretariat Direktorat Jenderal Perkebunan Kementerian Pertanian. Jakarta.
Idawati. 2015. Analisis Biaya Dan Pendapatan Usaha Tani dengan Sistem Kondomisasi pada Buah Kakao (Theobroma cacao. L) (Studi Kasus di Kelurahan Noling, Kecamatan Bupon, Kabupaten Luwu). J Perbal. 3(3): 1-12.
Kementan. 2017. Komoditas Pertanian Subsector Perkebuna: Kakao. Pusat Data dan Sistem Informasi Pertanian. Sekretaris Jenderal. Kementerian Pertanian.
Rahma H, Zainal A, Sinaga MS, Surahman M, dan Giyanto. 2014. Potensi bakteri endofit dalam menekan penyakitlayu stewart (Pantoea stewartii subsp. stewartii) pada tanaman jagung. J. HPT Tropika 14(2): 121-127.
Suratiyah, K. 2006. Ilmu Usahatani. Penebar Swadaya. Jakarta.
Trisno J, Habaza T, Jamsari dan Hidayat SH. 2013.Penapisan kemampuan isolat rizobakteri indigenus dalam meningkatkan ketahanan tanaman cabai terhadap penyakit virus daun kuning keriting. Prosiding Seminar Nasional dan Rapat tahunan dekan bidang ilmu pertanian BKS wilayah Barat. Pontianak 14 – 20 Maret 2013: 889-902.
Trisno, J. Reflin. dan Martinius. 2016. Vascular Streak Dieback (VSD) Penyakit Baru Tanaman Kakao di Sumatera Barat. J Fitopatol. Indo. In press.