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PENGARUH KONSENTRASI SENYAWA BELERANG TERHADAP TINGKAT SERANGAN PENYAKIT JAMUR AKAR PUTIH PADA STUM OKULASI MATA TIDUR TANAMAN KARET Junaidi Junaidi; Zaida Fairuzah
Jurnal Agro Estate Vol 2 No 1 (2018): Juni 2018
Publisher : Institut Teknologi Sawit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (642.397 KB) | DOI: 10.47199/jae.v2i1.43

Abstract

ABSTRACT White root disease (WRD) is a very harmful disease in rubber planting material preparation. The treatment method for infected budded stump has not been determined; therefore, the infected stump is usually directly eradicated through burning. This research aimed to understand the effect of the sulfuric compound to WRD rate and budded stump growth in polybag nursery. The research was arranged based on Completely Randomized Design (CRD) non-factorial with chemical concentration treatment using four levels i.e. 0 g/l (control), 2 g/l, 4 g/l, 6 g/l, dan 8 g/l that was carried out at Sungei Putih Research Center Greenhouse in Galang, Deli Serdang. The trial result indicated that the submersion of infected budded stump level two into sulfuric solution up to the concentration of 8 g/l for 15 minutes did not decrease WRD rate. The shoots growth showed was not significantly different than without submersion. The submersion method is seemed not proper to treat WRD on the budded stump since it only can be conducted once at the beginning of the stump planting into the polybag. Therefore, research on the effect of sulfur for WRD treatment on the budded stump has to be carried out variously from the dosage as well as application method viewpoint.
KARAKTERISTIK TETESAN LATEKS PADA BEBERAPA PERIODE PENGUMPULAN HASIL KLON PB 260 YANG MENGALAMI GUGUR DAUN SEKUNDER Mochlisin Andriyanto; Andi Wijaya; Arief Rachmawan; Junaidi Junaidi
Warta Perkaretan Vol. 38 No. 2 (2019): Volume 38, Nomor 2, Tahun 2019
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (553.115 KB) | DOI: 10.22302/ppk.wp.v38i2.628

Abstract

Gugur daun sekunder sangat mempengaruhi produksi lateks pada tanaman karet. Penelitian observasi dilakukan untuk mengetahui pola aliran dan produksi lateks pada beberapa waktu pengumpulan hasil tanaman karet klon PB 260 berumur 12 tahun yang mengalami gugur daun sekunder dengan intensitas ±70-75%. Penelitian dilakukan pada bulan September-November 2017 di Kebun Percobaan Balai Penelitian Sungei Putih, Deli Serdang, Sumatera Utara dengan sistem sadap S/2 d3.ET2.5% Ga1.0 6/y(m) pada panel B0-2. Lateks dikumpulkan dari lima pohon yang diulang sebanyak tiga kali dengan ancak sadap sebagai ulangan. Waktu pengumpulan lateks terdiri dari 20, 40, 60, dan 80 menit setelah disadap. Parameter pengamatan meliputi kecepatan aliran lateks (ml/menit), produksi per pohon per sadap (g/p/s), indeks produksi (g/p/s/cm), dan  kadar padatan total (%). Hasil pengamatan menunjukkan kecepatan aliran lateks menurun secara signifikan pada periode 0 - 40 menit setelah sadap, sedangkan setelah 40 menit penurunan kecepatan aliran lateks tidak signifikan. Produksi lateks dan indeks produksi menurun secara signifikan di setiap 20 menit periode pengamatan, sedangkan kadar padatan total lateks tidak berbeda nyata selama 0 - 80 menit setelah sadap. 
Co-Authors Andi Wijaya Arief Rachmawan Mochlisin Andriyanto Zaida Fairuzah