Asai Isolat Bakteri Kitinolitik Bacillus Sp. Bk17 Pada Media Pembawa Tanah Gambut Dan Kompos Janjang Kelapa Sawit Dalam Menghambat Pertumbuhan Jamur Patogen Sclerotium Rolfsii Dan Fusarium Oxysporum Pada Kecambah Cabai

Abstract

Assay of chitinolytic bacterial isolate of Bacillus sp. Bk17 in peat and palm oil bunch compost as carrier media in inhibiting Sclerotium rolfsii and Fusarium oxysporum of chilli seedlings. Sclerotium rolfsii and Fusarium oxysporum have been known as causal agents of seedling-off of chilli. Biological control has been used as an alternative control to replace chemical control. This study was aimed to determine the viability and ability of chitinolityc bacteria Bacillus sp. BK17 in carrier media of peat and palm oil bunch compost and in growing media to control seedling-off caused by S. rolfsii dan F. oxysporum of chilli. Our previous study showed that Bacillus sp. BK17 could reduce disease severity and intensity. Bacterial viability was measured as colony number grown after 90 days of storage in minimum salt medium with colloidal chitin as sole C source. Reduction of disease infection was measured as seedling number infected by S. rolfsii dan F. oxysporum. Seedling performances were measured as seedling height, leaf number and dry-weight after 30-days of growth. The result showed that bacterial cell viability was still high in both peat and palm oil bunch compost both with and without colloidal chitin addition after 90 days of storage. It was also shown that during application bacterial cell could grow. Seedling performaces i.e. seedling height, leaf number and dry-weight showed to be normal or even increase compared to those of pathogenic fungal inoculation only and (-) control.

Effect of Indole Acetic Acid (IAA) by Serratia marcescens strain MBC1 on Soybean (Glycine max L.) Germination

“…Biji kedelai yang dikecambahkan mengalami kematian dan busuk. Terjadi infeksi antara biji kedelai berkecambah dengan patogen jamur, sehingga biji kedelai busuk mengundang ulat dan semut [12]. Perkecambahan biji kedelai yang mati, kurang dari banyaknya ulangan yang dibutuhkan mengakibatkan data tidak dapat dianalisis lanjut.…”

Uji Efektivitas Ekstrak Kulit Manggis (Garcinia mangostana L.) terhadap Fusarium oxysporum pada Kecambah Kelapa Sawit

“…Riset pengendalian penyakit yang disebabkan oleh F. Oxysporum pada berbagai tanaman telah dilakukan, namun masih terbatas pada tanaman hortikultura misalnya pada cabai (Hutauruk, Suryanto, & Munir, 2016;Hutauruk, 2018), gladiol (Nuryani et al, 2016), dan bawang merah (Fitriani, Wiyono, & Sinaga, 2019). Riset pengendalian penyakit akibat F. Oxysporum pada tanaman kelapa sawit belum banyak dilakukan sehingga diperlukan upaya penanganan yang tepat, salah satunya menggunakan fungisida nabati.…”

Soil Chitinolytic Bacteria from Jambi Province to Produce Antifungal of Plant Pathogens

“…Oxysporum (Hutauruk et al, 2016). Enzim kitinase diutamakan dalam pengendalian hayati cendawan patogen saat ini karena kemampuannya mendegradasi kitin pada dinding sel cendawan (Ulhoa dan Peberdy 1991).…”