( ) Tembesu ( Roxb) merupakan salah satu jenis tanaman lokal yang cukup potensial untuk dikembangkan di daerah Sumatera Selatan, Jambi dan Lampung, karena jenis ini merupakan jenis asli di daerah tersebut dan mempunyai keunggulan baik dari sisi ekologi maupun nilai ekonominya. Namun dalam pengembangannya dijumpai adanya serangan hama rayap yang dikhawatirkan akan membahayakan tanaman. Oleh karena itu perlu dukungan riset, karena sampai saat ini laporan tentang jenis rayap yang menyerang tembesu dan pengendaliannya belum ada. Hasil penelitian menunjukkan bahwa jenis rayap yang ditemukan menyerang tanaman tembesu di kebun percobaan Way Hanakau, Lampung Utara adalah rayap (Isoptera; Termitidae). Rayap ini termasuk hama yang cukup penting karena berpotensi menyebabkan kerugian secara ekonomis dan menurunkan target pembangunan hutan tanaman tembesu.
ABSTRAC
Tembesu ( Roxb) is one of the local tree species that has fairly economic and ecological value. It is promising to be developed for the area in South Sumatera
Alstonia angustiloba, one of Pulai species, is a fast growing wich has been developed at Province of South Sumatera. This research was to study the effect of planting spaces on development of pests and diseaseson pulai darat (Alstonia angustiloba) in Kemampo expesimental forest, South Sumatera. The used method was Random Completely Block Design with 6 (six) treatments of planting spacing (2 x 2 m; 2 x 4 m; 3 x 2 m; 3 x 2,5 m; 3 x 3 m; 3 x 4 m) with 3 replicates. Parameters used were injury symptom, number of attacked plant and score of plant injury severity. The results showed that planting spacing of 3 x 4 m is effective spacing to suppress attack Cycnotrachelus sp. and Cephaleuros sp. in the third year after planting. The decreasing of attack percentage, beetle pest attack intensity and pathogens were 0.57%, 2.48% and 8.44% respectively.
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