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材料和方法:选用同期播种的小麦植株,病株为接过传毒介体灰飞虱的显症病株。采用从典型丛矮病株上饲毒的灰飞虱介体,接芽期小麦,经30天后启用。健株置防虫条件下,同期取用,为对照。 将供试材料洗净,去根。按鲜重含20％干物质及干物质中含5％的全氮量计算。按病株、健株各取含氮5毫克的材料,每毫克的全氮量加1毫升6 N盐酸计算,全部装入
MATERIALS AND METHODS: The wheat plants sown in the same period were selected and the diseased plants were the dominant disease isolates of the SBPH. Laodelphax striatellus, which is fed on virulent strains of dwarfing plants, is used for germination of the buds and is started after 30 days. Kin plant home pest control conditions, access to the same period, as a control. Wash the test materials to the root. According to fresh weight with 20% of dry matter and dry matter containing 5% of total nitrogen calculation. According to the diseased strains, healthy strains each take 5 mg nitrogen material, total nitrogen per mg plus 1 ml 6 N hydrochloric acid, all loaded