| dc.description.abstract | ESTHY AKNESYA SIMORANGKIR. Characterization of Leaf Disease on
Six Hybrid Derivatives Seedling Clones of Eucalyptus grandis x Eucalyptus
pellita PT. Toba Pulp Lestari Tbk. Toba Samosir, North Sumatra. Under
Guidance NELLY ANNA S.Hut., M.Si and Dr.. Ir. EDY BATARA MULYA
SIREGAR, MS.
Symptoms of the disease that attacks the dominant hybrid derivative clone
of Eucalyptus grandis x Eucalyptus pellita at nursery locations found in the leaves
. Characterization of leaf diseases need to do that aims to characterize the leaf
symptoms , the level of intensity and widespread attack , and identify the causes
of leaf disease. Observation of leaf symptoms done visually on 6 clones , also
conducted extensive computation intensity levels and cause disease Observations
conducted macroscopic disease include diameter , color , and form colonies , and
microscopic includes konidiospora , shape , size of conidia . The results showed
that there are 7 types of leaf symptoms , the intensity of the disease showed
immune clone 5 , and 1 clones resistant . Most widespread form of disease
symptoms from reddish patches of 29.8 % infected by Phaeophleospora sp . , And
other pathogenic fungi found attacking hybrid derivative clones of Eucalyptus
grandis x Eucalyptus pellita is Pestalotia sp . , Fusarium sp . , Cylindrocladium sp
. , and Aspergillus sp . | en_US |
