四种杀菌剂对金银花白粉病的防治效果及对金银花品质的影响

采用随机区组试验比较四种杀菌剂对金银花白粉病的防治效果，用高效液相色谱法测定各处理样品的绿原酸含量，以筛选出符合金银花规范化种植需要的药剂。结果表明，施药后14天以15％三唑酮600倍液防治效果最好，达77．8％，其次是15％三唑酮1200倍、50％多菌灵500倍液处理，防治效果分别为75．7％和70．8％，极显著地高于3％中生菌素500和1000倍及2％农抗1201000倍液处理的防效。2％农抗120500倍液的防治效果达60．3％，与前三种处理差异不显著，显著好于后三种处理，但未达极显著水平。15％三唑酮1200倍防治处理的绿原酸含量最高，达1．683％，其次是50％多菌灵500倍处理，绿原酸含量达1．539％，符合《中华人民共和国药典》要求，可作为金银花规范化管理中白粉病防治优先采用的药剂。

Effects of four fungicides on controlling the powdery mildew and their impact on quality of flos lonicerae, Lonicera japonica Thunb.

Randomized block design was used to evaluate the effects of four fungicides on controlling the powdery mildew of the flos lonicerae, Lonicera japonica Thunb., and HPLC was used to determine the content of chlorogenic acid. The results after 14 days of treatment showed that the 15% triadimefon WP at 600 times dilution had best control with 77.8%, followed by 15% triadimefon WP at 1[KG*5]200 times dilution and 50% carbendazim WP at 500 times dilution with the control efficacy of 75.7% and 70.8% respectively, which were the most significantly higher than the control of 3% Zhongshengmycin WP at 500 and 1[KG*5]000 times dilution, and 2% TF-120 SL at 1[KG*5]000 times dilution. The efficacy of 2% TF-120 SL at 500 times solution was 60.3% with no significant difference from that of the former three treatments, but was higher than that of the later three treatments at 5% level of significance. The flos lonicerae treated with 50% carbendazim WP at 500 times dilution had the highest content of chlorogenic acid (1.683%) followed by the treatment (1.539%) with 50% carbendazim WP at 500 times dilution, which could meet the demands of The Pharmacopeia of the PRC. Therefore these two treatments were the first choice for controlling the powdery mildew of flos lonicerae.