D.T. Sembel
Universitas Sam Ratulangi

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KADAR LOGAM BERAT (PB, CD, HG, DAN AS) PADA SUMBER AIR MINUM ISI ULANG (AMIU) DI KOTA MANADO Kabuhung, Anselmus; Sembel, D.T.; Rumengan, I.F.M.
Jurnal Ilmu dan Teknologi Pangan Vol 1, No 1 (2013)
Publisher : Pascasarjana Unsrat

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Abstract

The research data was obtained from direct observations and interviews with the manager of the depots, while the levels of some heavy metals (Pb, Cd, Hg, and As) in drinking water sources and recharge derived from the results of laboratory examination and presented in the form of table, graphs and compared with standard appropriate quality standard regulations (Permenkes No.492/Menkes/Per/IV/2010 on Drinking Water quality Requirements and Minister Regulation. 416/Menkes/per/IX/1990 of these Terms and Water quality Monitoring). Metal content of Pb, Cd and Hg in both raw water sources and refilled drinking water did not exceed the set standard quality, while the metal content of As in the water source did not exceed the standards for quality, but there was one depot of refill drinking water which obtained its water from water source had exceeded the drinking water quality standards in excess of 84% of the standard.
PERTUMBUHAN LIRIOMYZA SATIVAE BLANCARD DAN NESIDIOCORIS TENUIS REUTER PADA BEBERAPA GALUR SERTA VARIETAS TOMAT Sembel, D.T.; Manoi, T.; Tulung, M.; Pongoh, J.; Meray, M.; Ratulangi, M.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.93

Abstract

The objectives of thiswork was to study the difference on the population growths of these two pests of tomatoon plots with and without pesticide sprayings for 5 strains of tomatoes obtained from AVRDC (G1-G6) and 4 varieties (G7-G10) available in the local market. The population of leafminer started growing a week after replanting and reached the peak 7-8 weeks then it started declining until 12 weeks after replanting.Statistical analysis showed that there was no significant difference on the population growth of L. sativae on sprayed plots for all strains from AVRDCand varieties G7-G9 but it was significant different from G10. There was also no significant difference on population growths of L. sativae for strains G1,G2 and G4 to G7 and G8 but it was significant different with strains G5,G9 and G10 on sprayed plots and plots without spraying.The population of N. tenuis grew quicker and reached the peak on week 6 after replanting and starts declining until week 12th. Statistical analysis showed that there was no significant difference on the population of N. tenuis on all strains and varieties G7 and G8 on plots without spraying but there was significant difference for all strains and varieties G7-G9 with variety G10. ABSTRAKTujuan penelitian ini untuk mengetahui perbedaan pertumbuhan populasihama penggorok daun, Liriomyza sativae dan kepik tomat mirid, Nesidiocoris tenuis pada petak tanpa penyemprotan pestisida dan dengan penyemprotan pestisida pada 5 galur tomat yang berasal dari AVRDC dan 4 varietas tomat yang tersedia di pasaran.Populasi penggorok daun, L. sativae mulai terlihat sejak seminggu sesudah dipindahkan dan mencapai puncak 7-8 minggu kemudian populasihama mulai menurun sampai 12 minggu sesudah tanaman dipindahkan. Hasil analisis statistika tidak terdapat perbedaan nyata terhadap populasi L. sativae pada petak yang disemprot pestisida untuk semua galur dari AVRDC serta varietas G7- G9 tapi berbeda nyata dengan varietas G10. Juga, tidak terdapat perbedaan yang nyata antara populasi L. sativae untuk galur G1,G2, G4,G7dan G8 tetapi berbeda nyata dengan galur G5, G9 dan G10 pada petak yang tidak disemprot pestisida. Populasi L. sativae terendah pada varietas G10 baik pada petak penyemprotan maupunpetak tanpa penyemprotan pestisida.Populasi N. tenuis berkembang lebih cepat dan mencapai puncak pada minggu ke enam dan ke tujuh serta menurun sampai minggu ke 12 sesudah tanaman tomat dipindahkan.Hasil analisis statistika menunjukkan tidak terdapat perbedaan yang nyata terhadap populasi N. tenuis untuk semua galur dari AVRDC serta varietas G7 dan G8 pada petak tanpa penyemprotan tetapi terdapat perbedaan yang nyata antara semua galur dan varietas G7-G9 dengan varietas G10.