Enhancing Potato Crop cv. Granola Kembang – G2 Resilience Agaist Phytophthora infestans with Bamboo Rhizobacteria

¹ University of Muhammadiyah Malang, Jl. Raya Tlogomas 246, Malang 65144, East Java, Indonesia
² University of Agriculture Peshawar, 25130 Peshawar, Khyber Pakhtunkhwa, Pakistan
³ Merdeka University of Madiun, Jl. Serayu No.79, Madiun 63133, East Java, Indonesia
⁴ Office of Research, Innovation and Commercialization (ORIC), The University of Lahore, 1-Km Defence Road, 54000 Lahore, Pakistan

^* Corresponding author: dyahwati@umm.ac.id

Abstract

This study aimed to assess the ability of bacteria living in bamboo roots to suppress the pathogen Phytophthora infestans in Solanum tuberosum L. cv. Granola Kembang—G2. The research was conducted in Pujon Village, Malang Regency, East Java, from March to June 2022, using a factorial experiment arranged at random groups. The first factor is Plant Grow Promoting Rhizobacteria (PGPR), i.e. P1, PGPR derived from bamboo (Bambusa vulgaris Schrad. ex J.C.Wendl) roots; and P2, PGPR from Biopharma. The second factor is the concentration of PGPR, namely 10 mg L^–1 (C1), 20 mg L^–1 (C2), and 30 mg L^–1 (C3). There was no significant interaction between the PGPR source and the PGPR concentration treatment on the observed variables except tuber weight ha^–1. The PGPR source did not show significant differences in the intensity of disease attacks, the number of tubers plant^–1, and the percentage of tuber damage. PGPR concentrations showed significant differences in these three variables. The concentration of PGPR, which effectively and efficiently suppresses disease, is 20 mg L^–1 (C2), which is suitable for potato tuber production is 30 mg L^–1 (C3).