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在黄瓜幼苗子叶期及第1真叶期用苯酚、水杨酸、无水对氨基苯磺酸和氯化钾进行诱导接种,可使黄瓜植株产生对霜霉病的抗病性。在自然病原激发病害的试验中,经上述4种化学物质诱导的植株,其病株率比CK分别降低30％、0％、20％和20％;病叶率发别降低20.61％、6.80％、31.62％和20.72％;相对免疫效果分别为21.73％、35.19％、59.61％和40.84％。在人工接种病原激发病害试验中,经上述4种化学物质诱导的植株,其病株率分别降低28.57％、42.86％、57.14％和28.57％;病叶率分别降低89.13％、63.13％、72.96％和82.75％;相对免疫效果分别为91.15％、33.33％、55.99％和52.81％。
In cucumber seedling cotyledon and the first true leaf stage with phenol, salicylic acid, anhydrous p-aminobenzenesulfonic acid and potassium chloride inoculation, cucumber plants can produce resistance to downy mildew. In the natural pathogen-induced disease test, the plants induced by the above four chemicals showed a reduction of 30%, 0%, 20% and 20% of the diseased plants respectively compared with CK; the diseased leaves decreased by 20.61% and 6.80% , 31.62% and 20.72%, respectively. The relative immune effects were 21.73%, 35.19%, 59.61% and 40.84% respectively. In artificial inoculation pathogen-induced disease test, the diseased plants were reduced by 28.57%, 42.86%, 57.14% and 28.57%, respectively. The diseased plants decreased by 89.13%, 63.13%, 72.96% And 82.75% respectively. The relative immune effects were 91.15%, 33.33%, 55.99% and 52.81% respectively.