4种药剂对荷塘水绵的防除效果评价  

Control Effects of Four Different Reagents on Spirogyra in Lotus Pond

作　　者：李文玲 张云峰[2] 孟伟芳 孔德政[2] 

机构地区：[1]郑州市绿文广场管理处,河南郑州450002 [2]河南农业大学林学院,河南郑州450002

出　　处：《河南农业科学》2014年第4期84-88,共5页Journal of Henan Agricultural Sciences

基　　金：河南省重点科技攻关项目(072102150001)

摘　　要：为探明50%青苔一扫光可湿性粉剂等4种药剂对荷塘水绵的防除效果,采用荷塘试验研究了各药剂不同用量(熟石灰450、600、750kg/hm2;25%青苔净可湿性粉剂、25%杀青苔可湿性粉剂和50%青苔一扫光可湿性粉剂2.250、2.625、3.000kg/hm2)对水绵的防效。结果表明,50%青苔一扫光可湿性粉剂3.000kg/hm2对荷塘水绵有优良的防除效果,药后10d防效即达100%。25%青苔净可湿性粉剂3.000kg/hm2、25%杀青苔可湿性粉剂3.000kg/hm2和50%青苔一扫光可湿性粉剂2.625kg/hm2次之,药后20d其防效均可达100%。50%青苔一扫光可湿性粉剂3.000kg/hm2于水绵盛发初期配水675kg/hm2进行喷雾处理防除荷塘水绵,具有高效快速,施用方便,药效持久、稳定等特点,但在施药时要尽量避开花朵和荷叶,以降低药剂对荷塘的药害。建议将25%青苔净可湿性粉剂、25%杀青苔可湿性粉剂和50%青苔一扫光可湿性粉剂按季轮换使用,以提高药剂利用效率并延缓水绵抗性的产生。In order to ascertain the control effects of four different reagents on Spirogyra in the lotus pond,a pond experiment was conducted to investigate the effect of different dosages of the reagents （450,600,750 kg/ha for hydrated lime, 2. 250,2. 625,3. 000 kg/ha for 25% Qingtaijing WP,25% Shaqingtai WP and 50% Qingtaiyisaoguang WP respectively） on Spirogyra. The results showed that when the concentration was 3. 000 kg/ha,50% Qingtaiyisaoguang WP had excellent control effect on Spirogyra in the lotus pond, reaching 100% at 10 days after application. 25% Qingtaijing WP with 3. 000 kg/ha,25% Shaqingtai WP with 3. 000 kg/ha and 50% Qingtaiyisaoguang WP with 2. 625 kg/ha took second places, the efficiency of which reached 100%//00 after 20 days. In the early vigorous growth stage of Spirogyra, 3. 000 kg/ha of 500/oo Qingtaiyisaoguang WP could be dissolved with 675 kg/ha water for spraying, which was quick, efficient, convenient, and had a per- sistent and stable efficacy. However, when the powder was sprayed, it should avoid the flowers and leaves of lotus to decrease the phytotoxicity of the reagent to the lotus pond. Moreover,25% Qingtaijing WP,25% Shaqingtai WP and 50% Qingtaiyisaoguang WP were suggested to be used in turns according to different seasons in order to improve the efficiency of the reagents and delay the production of resistance of Spirogyra.

关 键 词：荷塘 水绵 药剂 防除效果 

分 类 号：S45[农业科学—植物保护]