26-29 Vol. 3, No.
Serangga
pada
Spesies
di
Nasional
Gunung
(Seed
Pests of Some
in Gunung
National Park, Wart Kdimantan)
IPB, UGM,
Diterima 10 April 13 Juni 11996
Various seed insect attack the dipterocarps, the effect of which are often severe. The objectives of the study were to the insect pests of four selected dipterocarp seeds and to asses the quantity seeds damaged by weevils, is one important pest The studies were conducted at the Gunung National Park, West Kalimantan. The four species of dipterocarps were selected at the dry lowland and hill dipterocarp rainforest. The species studied were Shorea S. and Six plots (lm x lm) were set up in radius of 10 meters from parent trees. Seeds collection were carried out at weekly intervals and the number of seeds collected in each plots were recorded. The seeds collected were counted and examined for insect damage. Thus, after examination, the seeds were classified either as mature, mature-ripe and ripe. The obvious insect damage seeds were in the bottles, to continue its development. The two species of weevils, sp. and sp. had been found identified from study. sp. (Coleoptera, Curculionidae) emerged from seeds of
and S. Curculionidae) emerged from the seeds of
The
dipterocarp seeds collected showed a rate of abortion and infestation. Up to 73% and 46.70% of total number of seeds collected and were attacked respectively.PENDAHULUAN
Indonesia 143 juta yang oleh
yang bernilai ekonomi juga minyak kawang (Natawiria dan Supriana, 1987).
Untuk perlu
penanaman regenerasi ini terdapat di dalam
biji sebagai yang
teratur (Meijer,
kerusakan biji serangan serangga, mamalia yang cukup ( Ng,
Musim dapat terjadi secara radis (minimast) atau (majormast).
sporadis dapat terjadi musim terjadi 4 9 tahun (Asthon, 1964; Meijer, 1974). Pada rnusim bersama,
pohon biji yang
biji yang biji
biji yang biji
stadia
pemakan biji yang
mukan kumbang (Alcidodes Nanophyes Malaysia (1974) melaporkan Alcidodes 12 spesies Shorea, sp.,
sp., dan sp..
menyerang 7 Shorea dan Di Kalimantan Alcidodes
rang biji Dipterocarpus cornutus Shorea selanica kan menyerang biji S. S.
dan S. smithiana. Akibat serangan tersebut, comutus, S. S. S. S. dan S. masing-masing kehilangan
dan 82% total biji yang (Natawiria et al., 1986).
Tujuan penelitian ini untuk mengetahui biji
S. gibbosa, S. johorensis, S. S. gian yang kerusakan biji akibat serangga.
biji 1 971 )
