UJI INFEKSI CYLINDROCLADIUM SP PADA TIGA KLON HIBRID EUCALYPTUS GRANDIS X EUCALYPTUS PELLITA
ABSTRACT: One of the diseases
that attack in the Eucalyptus nursery is Cylindrocladium causing
Cylindrocladium foliar spots and foliar blight disease. Cylindrocladium found
in eucalyptus nurseries PT Toba Pulp Lestari . According Sembiring (2008)
research, Cylindrocladium fungal virulence is the highest of the pathogen found
in nurseries . This study aimed to characterize the symptoms of foliar diseases
caused by Cylindrocladium on the derived crosses hybrid clones of the type of
Eucalyptus, Eucalyptus grandis x Eucalyptus pellita and measure the level of
the intensity of the attack, the extent of the attack, as well as the reaction
of plants (resistance) of the hybrid clones of Eucalyptus grandis x E. pellita.
Infection is done by spraying inoculants fungi on leaves of three clones
seedling of E. grandis x E. pellita age of two months, Clone IND 32, Clone IND
33 and Clone IND 45. The symptoms of infection that appearon leaves then
reisolated by the method of Koch's postulates. Symptoms caused by infection
Cylindrocladium on E. grandis x E. pellita leaves is blight disease. Symptoms
begin with yellowish brown spots and will be widened (necrotic) then continue
in severe leaf tissue death. The
incubation period for infection of Cylindrocladium faster seen in clone
IND 45, but the pace of progress has been slow. In clone IND 32 and IND 33 the
incubation period of infection longer appear, but the pace of progress are most
intense. Cylindrocladium infection does not affect the growth (resistance) of
E. grandis x E. pellita seed age of two months.
Penulis: Ervan F. Hutajulu,
Nelly Anna, Nelly Anna, Edy Batara Mulya Siregar, Edy Batara Mulya Siregar
Kode Jurnal: jpkehutanandd150240
