UJI ANTAGONIS Aspergillus sp. DAN Trichoderma spp. TERHADAP Fusarium sp., PENYEBAB PENYAKIT REBAH KECAMBAH PADA SENGON

dan_Nina_Mindawati, Neo_Endra_Lelana Illa_anggraeni

Jurnal Penelitian Hutan Tanaman
Vol 12, No 1 (2015): Jurnal Penelitian Hutan Tanaman

ABSTRACTEndophytic fungi is a group of fungi that can be developed as a biological control agent. Potency of endophytic fungi for agricultural crop has been studied widely, but still rare for forest trees. The study was conducted to find out the antagonistic groups agains Fusarium sp. Fusarium is a casual agent of dumping-off on sengon tree. The highest average of inhibition after seven days incubation was shown by Trichoderma harzianum Bio1999, was 46.36%, followed by isolates of Aspergillus sp. JTB 105, Trichoderma viride Bio19232, and Aspergillus sp. STB 107 were 41.72%, 31.13% and 28.48% respectively. Inhibition of Fusarium sp. occured through the mechanism of mutual inhibition. Based on the width of inhibition zone formed, isolate of Aspergillus sp. JTB105 of 2.25mm showed the highest value, then followed by isolates of T. harzianum Bio1999, T. viride Bio19232 and Aspergillus sp. STB 107 which were 1.50 mm, 1.00 mm and 0.75 mm respectively. ABSTRAKFungi  endofit  merupakan  kelompok  fungi  yang  dapat  dikembangkan  sebagai  agen  pengendali  hayati.  Studi mengenai  potensi  fungi  endofit  sudah  banyak  dilakukan  untuk  tanaman  pertanian,  namun  masih  sedikit  untuk tanaman kehutanan. Penelitian ini dilakukan untuk melihat aktivitas antagonis dua isolat dari kelompok Aspergillus dan Trichoderma terhadap Fusarium sp. penyebab penyakit rebah kecambah pada sengon. Penghambatan tertinggi pada  hari  ketujuh  ditunjukkan  oleh  Trichoderma  harzianum  Bio1999,  yaitu  sebesar  46,36%  dan  selanjutnya berturut-turut diikuti isolat Aspergillus sp. JTB 105, T. viride Bio19232, dan Aspergillus sp. STB 107 masing-masing sebesar 41,72%; 31,13% dan 28,48%. Penghambatan terhadap Fusarium sp. terjadi melalui mekanisme mutual inhibisi. Berdasarkan panjang zona inhibisi yang terbentuk, isolat Aspergillus sp. JTB105 menunjukkan hasil yang tertinggi,  yaitu  sebesar  2,25  mm  dan  selanjutnya  berturut-turut  diikuti  isolat  T.  harzianum  Bio1999,  T.  viride Bio19232 dan Aspergillus sp. STB 107 masing-masing sebesar 1,50 mm; 1, 00 mm dan 0,75 mm.