FLUKTUASI POPULASI WALANG SANGIT Leptocorisa oratorius F. (HEMIPTERA ALYDIDAE) PADA KOMUNITAS PADI DI DUSUN KEPITU,SLEMAN,DAERAH ISTIMEWA YOGYAKARTA
| Main Authors: | , Anita Pratimi, S.si., , Dr. R.C. Hidayat Soesilohadi, M.S. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2011
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/90299/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=53086 |
Daftar Isi:
- Research on population fluctuation of rice bug L. oratorius on paddy community planted with Situ Bagendit, Ciherang and IR64 rice varieties in Kepitu Village, Sleman was done. This experiment was conducted in April 2011 to July 2011 in the paddy community Kepitu Village, Sleman, Daerah Istimewa Yogyakarta. The objective of the research was to predict the population fluctuation of rice bug pest in rice crops in paddy community Kepitu Village, Sleman, Daerah Istimewa Yogyakarta with a special approach to correlogram analysis. The purposive sampling technique was used in this research. Rice terraces of the sampling unit were plotted in rice varieties of Situ Bagendit, Ciherang and IR64 respectively. Rice bug was counted in series of periodical time (every three days). Total number of rice bug per m2 was used for determining the serial correlation coefficient (rs) and the variance of log population density at time t and t +1 (log Nt and log Nt+1) for every three days (t).The value of rs was associated with s in correlogram. Fluctuation population of the rice bug determined through concistency periodicity and amplitude curve of the correlogram. The population distribution pattern was identified by means the ratio between variance and the average of total number of rice bug. The result showed that the population fluctuation of rice bug was predicted by the migration, two-way from the reservoir to rice crop and vice versa. Plots which were adjacent to refuge protected from insecticide sprays have higher abundance of rice bug than the plots which were located far from the refuge. Based on the correlation coefficient, the population fluctuation in the plots planted with Situ Bagendit rice experiencing oscillation. The corellogram curve showed exogenous and irregular type. In the plots planted with Ciherang rice, also experiencing oscillations with corellogram curve shapes indicate endogenous and exogenous type with an irregular periodicity. In the plots planted with IR64 rice, oscillating with the endogenous corellogram curve with non-stationary and nonperiodict type. The pattern of population distribution of rice bug in Kepitu Village was a clustered distribution.