Tissue sampling plants and sterilize skin.Samples of rubber with symptoms of falling leaves both stem leaves still green and petiole have bruises from the black rubber 40 garden. Be cleaned with water. Then cut a piece of petiole into small pieces and used to sterilize the skin. Hypochlorite concentration 0.5 percent for 1 minutes, then wash with clean water 2 times. Then brought on the white cloth to make dry, sterile1.2. Separate ไฟทอฟธอรา from plant parts using medium specific.The plant parts through the clear surface sterilized and screening ไฟทอฟธอรา by placing the plant parts on the food culture, solid 5% V8 (Ho and board,. 1984) explants an antibiotic rifampicin (rifampicin) and ampicillin (ampicillin) to inhibit the growth of bacteria, chemical Hymie Sasol. (hymexazol) and penta chloro nitrobenzene. (pentachloronitrobenzene). To inhibit the growth of fungi and other types of bond behind and were incubated in the dark, the temperature 25 degrees Celsius. When the growth to the observed colony is white. When viewed under a microscope to spores modest force that looks like the lemon and fiber coenocytic. Then had expected a ไฟทอฟธอรา fibers brought on a new dish. The curing temperature 25 degrees Celsius and pure culture of 100 isolate. To be used in the experiment the next step.
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