淡紫拟青霉、厚垣轮枝菌生防菌剂对当归“麻口病”的防治效果

Control effect of Paecilomyces lilacinus and Verticillium chlamydosporium against Ditylenchus destructor on Angelica sinensis

为了明确淡紫拟青霉、厚垣轮枝菌生防菌剂对当归生长量的影响及对麻口病的防治效果,进行了田间药效试验。结果表明,两种生防菌剂在当归移栽时拌细干土穴施对当归生长量（出苗、株高、叶片数、冠幅）有一定的影响;但可有效防治当归麻口病,其中淡紫拟青霉颗粒剂41.25kg/hm2处理组防效最高,为63.43%,与其他处理差异显著（P〈0.05）;各处理对当归有较好的增产作用,增产率为25.78%~63.01%,其中淡紫拟青霉颗粒剂45.00kg/hm2处理增产率最高,为63.01%,其次为厚垣轮枝菌微粒剂33.75kg/hm2处理,增产率为61.67%;菌剂各处理相比对照可明显提高特等归比例。淡紫拟青霉颗粒剂41.25、45.00kg/hm2和厚垣轮枝菌微粒剂33.75kg/hm2穴施可有效防治当归麻口病,提高当归产量,可用于生产上防治当归麻口病。

Paecilomyces lilacinus and Verticillium chlamydosporium are important biological agents on plant path-ogenic nematodes.In order to examine their effect on Angelica sinensis growth and against Ditylenchus destruc-tor ,we conducted field efficacy trails in this study.The results showed that 2 biocides had good effect on A. sinensis growth,including emerge of seedlings,plant height,leaves numbers and canopy width,and also showed good control efficacy against D .destructor .P .lilacinus GR with dose of 41.25 kg/hm2 had the best control effect with the efficacy of 63.43%,significantly higher （P 〈0.05）than that of the other treatments.Two biocides could also increase the yields of A.sinensis by the rate of 25.78%-63.01%,P .lilacinus GR with dose of 45.00 kg/hm2 was the best one,next was V .chlamydosporium MG with dose of 33.75 kg/hm2 .Compared with the con-trol,2 biocides treatments could obviously increase the proportion of top grade A.sinensis .P .lilacinus GR with dose of 41.25 and 45.00 kg/hm2 and V .chlamydosporium MG with dose of 33.75 kg/hm2 demonstrated good con-trol efficacy against D .destructor and increased the yields of A.sinensis ,which could be applied in practice.