室内测定表明,菌毒清对Valsa mali菌丝生长和分生孢子散发具有极强的抑制作用。该药剂对菌丝生长的剂量反应回归式为y=3.755+1.951x,EC_(50)为4.35ppm,EC_(95)为30.14ppm;对分生孢子萌发的剂量反应回归式为y=1.266+4.870x,EC_(50)为5.844ppm,EC_(95)为12.69ppm。在50ppm和100ppm表现抑菌作用。200ppm以上表现杀菌作用。残效期为25～30天。田间试验50～100ppm药液涂治病斑治愈率98%以上,未见复发。 Laboratory tests showed that mycotoxin had a strong inhibitory effect on mycelial growth and conidia distribution of Valsa mali. The regression equation for the dose response of the agent to mycelial growth was y = 3.755 + 1.951x, EC50 (50) was 4.35ppm and EC_ (95) was 30.14ppm. The regression equation for the dose response of conidia germination was y = 1.266 + 4.870x, EC_ (50) was 5.844 ppm and EC_ (95) was 12.69 ppm. Bacteriostatic effects at 50 ppm and 100 ppm. More than 200ppm bactericidal effect. Residual validity of 25 to 30 days. Field trial of 50 ~ 100ppm drug solution spot cure rate of 98% or more, no recurrence.