Uji Infeksi Phaeophleospora Sp. Pada Klon Hibrid Eucalyptus Grandis X Eucalyptus Urophylla Di PT. Toba Pulp Lestari, Tbk Kabupaten Toba Samosir, Sumatera Utara
ABSTRAK
SARDO SINAGA. Uji Infeksi Phaeophleospora sp. pada klon hybrid
Eucalyptus grandis x Eucalyptus urophylla di PT. Toba Pulp Lestari, Tbk
Kabupaten Toba Samosir, Sumatera Utara. Dibawah bimbingan Dr. Ir. EDY
BATARA MULYA SIREGAR, MS dan RIDAHATI RAMBEY, S.Hut, M.Si
Phaeophleospora sp. merupakan salah satu patogen penyakit penyebab
hawar daun yang menyerang tanaman Eukaliptus terutama yang masih muda.
Penelitian ini bertujuan untuk mengkarakterisasi gejala penyakit daun, mengukur
tingkat intensitas serangan, luas serangan, serta reaksi tanaman (resistensi)
terhadap infeksi Phaeophleospora sp. pada tiga klon hybrid Eukaliptus. Klon
yang di uji adalah IND 68, IND 69, IND 73. Inokulasi dilakukan dengan cara
penyemprotan inokulum ke tanaman. Pengamatan gejala dilakukan setiap hari
sejak inokulasi dilaksanakan. Hasil pengamatan menunjukkan bahwa awal gejala
yang muncul adalah sama. Gejala diawali timbulnya bercak kekuningan pada
permukaan daun dan semakin melebar hingga timbulnya bercak kemerahan yang
menandakan serangan penyakit sudah parah. Intensitas serangan pada tiga klon
yang diuji tidak menunjukkan pebedaan nyata mulai pengamatan pertama hingga
pengamatan keenam setelah inokulasi. Hasil uji berdasarkan luas serangan
menunjukkan bahwa semua klon terinfeksi 100%.
Kata kunci: Eucaliptus sp, Phaeophleospora sp, Uji Infeksi, Resisten
Universitas Sumatera Utara
ABSTRACT
SARDO SINAGA Infection Test Phaeophleospora sp. on Hybrid Clones
of Eucalyptus grandis x Eucalyptus urophylla in PT. Toba Pulp Lestari Tbk,
North Sumatera. Under academic supervision by Dr. Ir. EDY BATARA
MULYA SIREGAR, MS and RIDAHATI RAMBEY, S.Hut, M.Si.
Phaeophleospora is one of phatogenic diseases that caused blight leaf and
attacked Eucalyptus plant especially the callow one. The goals of this research
were characterizied the symptom of leaf diseases, measured the level of intensity
and the extensive damage, and how the plant (resistance) reacted the
phaeophleospora infection, in three Eucalyptus hybrid clones, such as IND 68,
IND 69, IND 73. Inoculation applied by spraying inocol to the plants. The
symptom was observed everyday since was inoculation was applied and it showed
same symptom according to the observation. There was large yellowish spots on
the leaf surface at the beginning and became reddish spots, it mean that the
disease was getting worse. The level of intensity from the three tested clones
didn’t show the real difference from first until sixth observation after inoculation
was applied. According to the extensive damage, the result showed that three
clones were 100% infected.
Key words : Eucalyptus, Cylindrocladium sp, Infection Test, Resistant
Universitas Sumatera Utara
SARDO SINAGA. Uji Infeksi Phaeophleospora sp. pada klon hybrid
Eucalyptus grandis x Eucalyptus urophylla di PT. Toba Pulp Lestari, Tbk
Kabupaten Toba Samosir, Sumatera Utara. Dibawah bimbingan Dr. Ir. EDY
BATARA MULYA SIREGAR, MS dan RIDAHATI RAMBEY, S.Hut, M.Si
Phaeophleospora sp. merupakan salah satu patogen penyakit penyebab
hawar daun yang menyerang tanaman Eukaliptus terutama yang masih muda.
Penelitian ini bertujuan untuk mengkarakterisasi gejala penyakit daun, mengukur
tingkat intensitas serangan, luas serangan, serta reaksi tanaman (resistensi)
terhadap infeksi Phaeophleospora sp. pada tiga klon hybrid Eukaliptus. Klon
yang di uji adalah IND 68, IND 69, IND 73. Inokulasi dilakukan dengan cara
penyemprotan inokulum ke tanaman. Pengamatan gejala dilakukan setiap hari
sejak inokulasi dilaksanakan. Hasil pengamatan menunjukkan bahwa awal gejala
yang muncul adalah sama. Gejala diawali timbulnya bercak kekuningan pada
permukaan daun dan semakin melebar hingga timbulnya bercak kemerahan yang
menandakan serangan penyakit sudah parah. Intensitas serangan pada tiga klon
yang diuji tidak menunjukkan pebedaan nyata mulai pengamatan pertama hingga
pengamatan keenam setelah inokulasi. Hasil uji berdasarkan luas serangan
menunjukkan bahwa semua klon terinfeksi 100%.
Kata kunci: Eucaliptus sp, Phaeophleospora sp, Uji Infeksi, Resisten
Universitas Sumatera Utara
ABSTRACT
SARDO SINAGA Infection Test Phaeophleospora sp. on Hybrid Clones
of Eucalyptus grandis x Eucalyptus urophylla in PT. Toba Pulp Lestari Tbk,
North Sumatera. Under academic supervision by Dr. Ir. EDY BATARA
MULYA SIREGAR, MS and RIDAHATI RAMBEY, S.Hut, M.Si.
Phaeophleospora is one of phatogenic diseases that caused blight leaf and
attacked Eucalyptus plant especially the callow one. The goals of this research
were characterizied the symptom of leaf diseases, measured the level of intensity
and the extensive damage, and how the plant (resistance) reacted the
phaeophleospora infection, in three Eucalyptus hybrid clones, such as IND 68,
IND 69, IND 73. Inoculation applied by spraying inocol to the plants. The
symptom was observed everyday since was inoculation was applied and it showed
same symptom according to the observation. There was large yellowish spots on
the leaf surface at the beginning and became reddish spots, it mean that the
disease was getting worse. The level of intensity from the three tested clones
didn’t show the real difference from first until sixth observation after inoculation
was applied. According to the extensive damage, the result showed that three
clones were 100% infected.
Key words : Eucalyptus, Cylindrocladium sp, Infection Test, Resistant
Universitas Sumatera Utara