锥栗溃疡病的化学防治

应用8种化学农药对福建锥栗溃疡病进行化学防治，结果表明，不同药剂不同浓度处理后，锥栗溃疡病病斑抑制率、病斑愈合率和绝对防治率均存在显著差异。不同处理中，25％溃疡灵可湿性粉剂200、400倍液和80％代森锌可湿性粉剂200倍液的绝对防治率较好，分别达到869．6％、633．4％和385．3％。8种药剂的3种浓度中，80％代森锌可湿性粉剂200倍液对病斑抑制率、病斑愈合率和绝对防治率均产生较好的效果。

Chemical control of the pole-canker disease in Castanea henryi

Eight chemical pesticides were used to conduct chemical control on the pole-canker disease of Castanea henryi in Fujian. The results showed that there was a significant difference in the inhibiting and recovering rates of the pole-canker spots and the abso- lute control rate among treatments with different pesticides and concentrations. The absolute control rates of the 200 and 400 times solution of WP of 25% fylomac and the 200 times solution of WP of 80% zineb reached 869.6%, 633.4% and 385.3%, respec- tively. Of the 3 concentrations of 8 pesticides, the 200 times solution of WP of 80% zineb performed better in the inhibiting and recoveting rates of the polecanker spots, and was preferred to control pole-canker disease of C. henryi.