CONSORTIA Bacillus spp. FOR CONTROL OF Sclerotium rolfsii IN CHILLI (Capsicum annuum L.)

Noveriza Hermeria1*,, Yulmira Yanti1Nurbailis1, Ujang Khairul1

1 Program Studi Proteksi Tanaman Fakultas Pertanian Universitas Andalas 25163

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ABSTRACT

Sclerotium rolfsii is a soil-borne pathogenic fungus on chili plants that can cause yield losses of up to 40-75%. The consortium of endophytic bacteria Bacillus spp as biological agents is a relatively inexpensive and environmentally friendly control method. The aim of this study was to obtain the best consortium of Bacillus spp. isolates for the control of Sclerotium rolfsii. This research is an experimental study using a completely randomized design (CRD) consisting of 4 treatments of the Bacillus spp consortium, namely Treatment A (AGBE 2.1 TL + SLBE 2.3 BB), Treatment B (AGBE 2.1 TL + SLBE 1.1 BB), Treatment C (SLBE 2.3 BB). +SLBE 1.1 BB), Treatment D (AGBE 2.1 TL+SLBE 1.1 BB+SLBE 2.3 BB), Positive control (plants without S. rolfsii inoculation and without introduction of Bacillus spp.), Negative control (plants inoculated with S. rolfsii without introduction of Bacillus spp. ), comparison control (with Mankozeb administration) with 6 replicates each. Each consortium of Bacillus spp. endophytic bacteria was introduced to chili seeds and seedlings. The results showed that almost all consortiums of endophytic bacteria Bacillus spp were able to suppress the development of Sclerotium rolfsii both in the nursery phase and in the field. The B. toyonensis AGBE 2.1 TL+ B. thuringiensis SLBE 2.3 BB consortium was the best consortium in suppressing the development of seedling fall and stem rot caused by Sclerotium rolfsii.

Key words : stem rot, chili, consortium, seedling fall, Sclerotium rolfsii,

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