作者: Teguh Iman Santoso , Adi Prawoto , Sudarsianto Sudarsianto
DOI: 10.22302/ICCRI.JUR.PELITAPERKEBUNAN.V29I1.188
关键词:
摘要: Canopy replacement with vascular streak dieback (VSD) resistant clones is expected to reduce VSD infestation by reducing space of Oncobasidium theobromae infection, and increase cocoa yield. This experiment was carried out in endemic areas Kaliwining Experimental Station of ICCRI Kendenglembu estate. technique was done side cleft grafting on primary branches top grafting plagiotropic branches. Number grafted shoots per plant, i.e. 1, 2, 3, 4, 5 6 used as treatments using Sca and Sulawesi 1. The 12 were arranged randomized complate block design, each treatment replicated times 10 plants treatment. Growth shoot, canopy coverage development incidence the main variables. In Kaliwining, applied at 1.5 m above soil surface 1 clones scion TSH 858 ICS 60 rootstocks. intensity observed scoring method. Cocoa yield main variable. result showed that both techniques caused similar growth rate shoots. covering by reduced following Y = -0.7848X + 69.324 (R² 0.995) equation. Three shoots tree effective infestation. Four years after bean using 434% over control while 360% for compared to average ungrafted 858. Polyphenol content both resistant higher than that on susceptible ones, however transfer mechanism substance susceptible stocks still unknown. It concluded productive considered be an method overcome problem improve yield. Key words:Theobroma cacao, vascular dieback, canopy replacement,