KETAHANAN SENGON PROVENAN PAPUA UMUR 2 TAHUN TERHADAP KARAT TUMOR PADA UJI RESISTENSI DI CIAMIS, JAWA BARAT

Abstract

This study aims to determine the provenance of sengon that is resistant / tolerant to tumor rust attack in Panjalu District, Ciamis Regency. The experimental design used in developing a resistance test plot was a completely randomized block / RCBD (Randomized Complete Block Design). There were 12 provenances used in this trial, consisting of 25 treeplot (5 x 5) from Papua, with 4 blocks as replications and spacing of 2 mx 3 m.. The results showed that provenance differences did not significantly affect all 2-year-old sengon growth parameters. The highest survival rate was achieved by Nifasi provenance (95%) and the lowest was achieved by Elaigama provenance, Hobikosi (67%). The average height ranges from 3.17 meters (Meagama) to 5.51 meters (Maidi, Nabire), while the average stem diameter ranges from 3.27 cm (Pyramid, Muai) to 6.72 cm (Maidi, Nabire ) Up to 2 years old, there were 3 provenances of sengon from Wamena which were tolerant of tumor rust attack, namely from Waga-Waga, Holima and Hobikosi. Meanwhile, attacks on 9 other provenances were generally still in the low level, i.e. the highest Disease Incidence and disease severity were Wadap and, Menawi provenances by 20.8% and 43% respectively. These provenances need to be evaluated continuously to find out the provenances that are resistant to gall rust disease over one rotation period as genetic material for future sengon forest development.