几种药剂对草坪褐斑病菌的毒力测定

Toxicity response of different fungicides to Rhizoctomia solani AG-1-IB

采用生长速率法测定了5种药剂对草坪褐斑病菌（Rhizoctomiasolani AG-1-IB融合群）的毒力,结果表明：井冈霉素、农抗120、氯胺磷、多菌灵和百菌清对草坪褐斑病菌的抑菌区间分别为200～4000μg/mL、31.3～8000μg/mL、312.5～5000μg/mL、3.1～25.0μg/mL和6.3～100μg/mL,它们对草坪褐斑病菌的EC50值分别是730.3、1016.2、1589.0、10.3和26.0μg/mL,多菌灵对草坪褐斑病菌的毒力最高.

Toxicity of different fungicides against Rhizocomia solani AG-1-IB was tested by mycelium hypha growth in the laboratory. The results show that the antibacterial range to R. solani AG-1-IB of the inhibitory concentration of jinggangmycin, agricultural antibiotic 120, chloramine phosphorous, carbendazim and chlorothalnil are 200--4 000,31.3--8 000,312. 5--5 000,3.1--25.0 and 6.3--100μg/mL, respectively. And its EC50 to R. solani AG-I-IB are 730.3,1 016.2,1 589.0,10.3 and 26.0 μg/mL, respectively. Carnbendazim showed the best toxicity.