Leaf Diseases On Eucalyptus Pellita F. Muell In Plantation Of Pt Surya Hutani Jaya At Sebulu, East Kalimantan

Eucalyptus pellita is often grown in monoculture, can be susceptible to disease whether grown in the nursery or the field. Currently in the plantation of PT Surya Hutani Jaya, Sebulu is developing E. pellita, derived from seed and clonal. The results were then called family. To determine the benefits to trees, the company deliberately does not preserve this area so there will be generated trees (family) that excel in both productivity and resistance to pests and diseases. This study is aimed at determining the symptoms and signs of disease on the leaves, the microorganisms that cause disease on the leaves as well as the incidence and severity of pathogen that attacks the leaves of E. pellita. The research was conducted at PT Surya Hutani Jaya, Sebulu, Kutai Kartanegara Regency, East Kalimantan and continued with the identification of pathogens at the Laboratory of Forest Protection, Faculty of Forestry, University of Mulawarman. The object of this research was E. pellita of a 6 year old plantation, spacing of 3  2 m. The origin of E. pellita is a clone from Riau. Symptoms of the disease found at the progeny test were leaf spot and leaf blight. The pathogens were Cercospora sp., Pestalotia sp., Curvularia sp., Bipolaris sp., Marsonina sp. and Dactylaria sp. The incidence of leaf spot pathogen was 83.3% and leaf blight was 80.6% with the severity of 9.7% and 12.5%, respectively.

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