Selection of durable rubber, white root disease
breeding ago to focus on improving rubber for tires thoroughbred. Yield latex high quality and resistant to the disease as well. I will not tire, rubber, breeding new varieties to encourage farmers to plant. It takes at least 25 years (and the jasmine, 2545), and each step is complicated. But the key is present, farmers planted a lot of RRIM 600 tires because the rubber varieties that yield higher latex. Allow farmers to store grain yield clone. RRIM 600, most of which is made of the source. The tire traditional varieties used as rootstocks decreased and remained somewhat in the particular region and tires of RRIM 600 varieties susceptible to root white (Urai et al, 2539), so the selection of seedlings of rubber varieties. original To be used as a rootstock that is resistant to white root disease. This would be very useful
in the selection of varieties resistant or durable white root disease. Initially have to be prepared pathogens and white roots inoculated to the roots by means of a suitable timber. The study of emotions (2541) were collected mushrooms and roots of natural rubber latex is white root disease. From rubber cultivation in areas where the disease. The isolation, purification and mold fungi collected for laboratory experiments using tissue transplant ting then compare the basic characteristics of each breed mold growth by seeding. Fungal growth on agar potato dextrose agar (PDA) and then cultured the fungi R. microporus all species spawn in the bag pack. Recipes using the rubber sawdust bran, sugar and water ratio of 100: 3: 2: 50 by weight of the different strains of the fungus R. lignosus white root causes of the timber of the 24 species studied. growth And filamentous fungal species found on PDA WCP 2 WSR 1 W 4 W 6 W 3 W 5 WKM 1 and could grow slightly at 20 ° C, while the other species can not grow. There were no significant differences in both growth and filamentous form when cultured on at room temperature. The differences in the ability of pathogenic fungal species BPM 24 rubber seedlings and PR255 that each species of fungi can cause seedling rubber each with different breeds. And can not be grouped together (Payao and Board, 2547) A study by the Rubber Research Institute (2547) were isolated from diseased samples in the lab and proven in greenhouse disease. By embedding block infection diameter of 3-4 inches long, 8 inches into the ground, packed in black plastic bag, size 12x18 inch seedlings tires for signs of diseases of seedlings that timber introduced species susceptible to root disease. White is the most RRIM600 (55 percent), followed by the BPM 24 (19.6 percent), while Urai et al (2539) Seedlings tires were introduced on the 1st floor of five varieties RRIM600 GT1 PR 255 PR 26 and KRS156 planted around. stem cuttings, rubber eye is white root disease. The results showed that Timber species suggest weaker than the PR 261 species susceptible medium is PR 255 and GT1 and species most vulnerable is KRS156 and RRIM600 and now there were no rubber introduced species resistant to root white
because there is no education. The sturdy white root disease in traditional varieties. Therefore, this study will focus on investigating specific to traditional varieties. This is a species with wide genetic base. To find potential clones resistant to disease. To be used as rootstock For commercial timber production in the future.
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