| Summary: | The coconutas acompetitive commoditiesin North Sulawesi was
constrained by attack Sexava spp. The research aims to (1) Know characteristic
habitat of Long-Tailed Shrike L. schach in Tanjungsari and Moronge, (2)
Evaluate the establishment of Long-Tailed Shrike L. schach in destination
habitat, (3) Evaluate the impact of the introduction of L. schach to population of
S. nubila and damage intensity of coconut palm leaves. The observations on
vegetation and insect were conducted using a combination of path sand terraced
line methods. Vegetation and insect diversity was calculated by Shannon index
(H'), the similarity of two habitats was measured through similarity index (IS).
Populations, dispersal, and the emergence of a new progeny of Long-Tailed
Shrike L. schach was observed directly by the transect. Populations of S. nubila
and damage intensity on coconut leaves was observed at 120 coconut trees
sampled one month before and 10 months consecutive after release of L. schach.
The results showed the diversity of insects in the origin habitat 2,57 where as in
the destination habitat 2,87. The similarity index of vegetation and insects
between origin and destination habitats are 19-25% and 29%. Within three
months after the release, 20 out of the 40 individuals of the Long tailed shrike
were rediscovered, It has been dispersed as far as 6-15 km from the release site,
and found two young L. schach. The average population of S. nubilaat 10
months after release (21.05 individuals/tree) was significantly lower than at one
month before the release (23.65 individuals/tree). The moderate and severe
damage intensity turned into light within three and five months after the release
of L. schach.
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