Penggunaan beberapa cendawan endofit untuk menekan penyakit layu pada jahe (Zingiber officinale Rosc.) di lahan gambut

Efforts to overcome R. solanacearum which causes bacterial wilt (BW) in ginger in peatlands are through a strategy to suppress the initial population. One of the efforts is to use endophytic fungi (CE) as biological control agents. This study aims to examine the use of several endophytic fungi isolates from pepper to suppress bacterial wilt disease and improve the growth of ginger. The treatment of CE biological agents in the form of Aspergillus spp., Fusarium sp., T. harzianum, and T. viride to suppress wilt disease in vivo and the use of biological agents as biofertilizers in the field. The source of the pathogenic bacterium P. solanacearum was obtained from samples of wilted rhizomes from community ginger field isolated on NA media. This study was arranged based on a completely randomized design with five replications. The research variables were wilt disease severity, plant height, number of leaves, number of stems, stem diameter & rhizome weight. The results showed that R. solanacearum caused symptoms after an incubation period of 9 days after inoculation. The four CE isolates were able to suppress the symptoms of ginger wilt in the range of 70-80%. The use of CE isolate was also able to improve the growth of ginger, but it has not been followed by an increase in the production of ginger rhizomes. It is suggested that the use of CE as a biofertilizer needs to be increased in the frequency of its application.Upaya mengatasi R. solanacearum penyebab layu bakteri pada jahe di lahan gambut melalui strategi menekan populasi awal . Salah satu upaya adalah menggunakan cendawan endofit (CE) sebagai agens pengendali hayati. Penelitian ini bertujuan mengkaji penggunaan beberapa isolat cendawan endofit asal lada untuk menekan penyakit layu bakteri dan memperbaiki pertumbuhan jahe. Perlakuan agens hayati CE berupa Aspergillus spp., Fusarium sp., T. harzianum, dan T. viride untuk menekan penyakit layu secara in vivo dan penggunaan agens hayati sebagai biofertilizer di lapangan. Sumber patogen bakteri P. solanacearum diperoleh dari sampel rimpang bergejala layu dari kebun jahe masyarakat yang diisolasi pada media NA. Penelitian ini disusun berdasarkan rancangan acak lengkap dengan lima ulangan. Variabel penelitian berupa keparahan penyakit layu, tinggi tanaman, jumlah daun, jumlah batang, diameter batang & bobot rimpang. Hasil penelitian menunjukkan bahwa R. solanacearum menimbulkan gejala setelah masa inkubasi selama 9 hari setelah inokulasi. Keempat isolat CE mampu menekan gejala layu jahe dengan kisaran 70-80%. Penggunaan isolat CE juga mampu memperbaiki pertumbuhan jahe, tetapi belum diikuti dengan peningkatan produksi rimpang jahe. Di sarankan penggunaan CE sebagai biofertilizer perlu ditingkatkan frekuensi aplikasinya