【摘要】 研究了苯丙噻二唑(BTH)和磷酸盐(K2HPO4)处理黄瓜黄化苗后对黄瓜黑星病(Cladosporiumcuc-umerinum)的诱导抗病性。结果表明,0.05～0.70mmol/L的BTH均有不同程度的诱导效果,其中0.5mmol/L BTH处理效果最明显,病情指数由对照的90.58降至28.43,发病率由100%下降到58.82%;K2HPO4对抗黄瓜黑星病的诱导效果不及BTH。0.05～0.70mmol/LBTH对黑星菌孢子萌发及菌丝生长均无直接抑制作用。1～100mmol/LK2HPO4对黑星菌菌丝生长无抑制作用,但10mmol/L以上浓度对孢子萌发有抑制作用。更多还原

【Abstract】 The induced resistance to Cladosporium cucumerinum was conducted through etiolsted cucumber seedlings treated with benzothiadiazole (BTH) and phosphate (K 2HPO 4) respectively.The result showed that 0.05-0.70 mmol/L BTH expressed different effects on induced resistance,among which the induced resistance in seedlings treated with 0.5 mmol/L BTH had the best effect,the disease index decreasing from 90.58 (CK) to 28.43 and the incidence decreasing from 100% (CK) to 58.82%.Comparatively,the effects sprayed with K 2HPO 4 were not as good as those with BTH.BTH had no direct inhibition on the spore germination and mycelial growth at the concentrations from 0.05 to 0.7 mmol/L.K 2HPO 4 didnt inhibit the mycelial growth at the concentration from 1 to 100 mmol/L,but did inhibit the spore germination at the concentration from 10 mmol/L up.更多还原