苦参与百部提取物对几种植对几种植物病原菌的抑制作用研究

试验研究苦参与百部农药活性提取物及其复配物对几种植物病原菌的抑制作用结果表明,各农药活性提取物及其复配物对稻胡麻叶斑病菌、立枯丝核菌、稻恶苗病菌、白菜黑斑病菌、十字花科蔬菜黑腐病病菌与十字花科蔬菜软腐病病菌、茄科蔬菜青枯病菌均有不同抑制作用;各提取物抑制效果随提取物浓度的提高而相应增强,最低抑制浓度多<0 .5mg/ mL ,并对白菜黑斑病菌孢子萌发也有明显抑制作用。与单一提取物相比,复配物对稻胡麻叶斑病菌和十字花科蔬菜软腐病病菌的抑制效果有所增强,但对十字花科蔬菜黑腐病病菌的作用较小,对稻恶苗病菌和茄科蔬菜青枯病菌的作用反而减弱

Inhibition of the extractions of Stemona tuberosa Lour and Sophora flavescans on some plant pathogenic germs

The inhibitions of the extractions of Stemona tuberosa Lour and Sophora flavescans and their mixture on some plant pathogenic germs were studied.The results indicate that the extractions and their mixture can inhibit Bipolaris oryzae, Rhizoctonia solani, Fusarium moniliforme, Alternaria brassicae,Xanthonomas compestris var. compestris, Erwinia carotovora var. carotovora and Ralstonia soslanacearum. The inhibiting?effects of the extractions get better when their concentrations rise. The minimum inhibition concentrations of the extractions and their mixture are under 0.5 mg/mL. The extractions and their mixture can also inhibit the sprouting of Alternaria brassicae's spore. Compared with the simplex extractions, the inhibiting?effects of mixture on Bipolaris oryzae and Erwinia carotovora var. carotovora get better, but there are no obvious effects on Xanthonomas compestris var. compestris, Fusarium moniliforme, and Ralstonia soslanacearum.