UJI INFEKSI CYLINDROCLADIUM SP PADA TIGA KLON HIBRID TURUNAN EUCALYPTUS GRANDIS X EUCALYPTUS UROPHYLLA DI PT. TOBA PULP LESTARI, TBK PORSEA
ABSTRACT: One disease that
attacks the seeds of eucalypts is Cylindrocladium. Cylindrocladium foliar
disease-causing spot and foliar blight. PT Toba Pulp Lestari developed many
types of clones by vegetative means. This research aimed to characterize the
symptoms of the disease leaves, measuring the level of intensity of the
attacks, spacious attacks and reactions of plants (resistance) against
infection Cylindrocladium sp on three clones of Eucalyptus hybrid. Clones test
in the IND 68, IND 70, IND 73. Inoculation was done by spraying. Each plant was
sprayed as many as 10 ml of inoculant to the entire leaf surface evenly with
spore density of 3.44 x spores/cc. Observation of symptoms is done every day
since the inoculation held. The results showed the same symptoms. Symptoms
begin with yellowish spots and will widen (necrotic) and continues in death of
leaf tissue. The intensity of the attacks on three clones tested showed no real
effect from the third until the sixth observation after the inoculation. The
test results also showed that all the clones are infected 100%.
Key words: Eucalyptus sp,
Cylindrocladium sp, Infection Test, Resistant
Penulis: R.R. Malau, R.
Rambey, E.B.M Siregar
Kode Jurnal: jpkehutanandd160221
