乙磷铝在香榧体内的传导分布及对香榧根腐病防治效果  

Conductance distribution of fosetyl-aluminum in Torreya grandis and control efficacy on root rot

作　　者：初楚 姜壮 张昌朋[3] 左璐莹 毛赟来 尹易平 陈安良[1] CHU Chu;JIANG Zhuang;ZHANG Changpeng;ZUO Luying;MAO Yunlai;YIN Yiping;CHEN Anliang(National Local Joint Engineering Laboratory of High efficiency preparation Technology of Biopesticide,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;Meitan Forestry Bureau,Zunyi 564100,Guizhou Province,China;Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;Anji Forestry Bureau,Huzhou 313300,Zhejiang Province,China)

机构地区：[1]浙江农林大学生物农药高效制备技术国家地方联合工程实验室,杭州311300 [2]贵州省湄潭县林业局,贵州遵义564100 [3]浙江省农业科学院农产品质量安全与营养研究所,杭州310021 [4]浙江省安吉县林业局,浙江湖州313300

出　　处：《农药学学报》2024年第6期1135-1143,共9页Chinese Journal of Pesticide Science

基　　金：浙江省重点研发项目(2019C02024)。

摘　　要：为明确乙磷铝在香榧体内传导分布及对香榧根腐病的田间防治效果,将0.5%乙磷铝水剂(SL)对3年生香榧注干施药7、14和21 d后,采用HPLC-MS测定了乙磷铝在香榧体内各部位的分布;并将0.5%乙磷铝SL对13年生香榧连续注干施药3年,每年3月中旬施药1次。第3年施药90和180 d后测定了乙磷铝在香榧体内各部位的残留,第3年施药15、45和180 d后检测香榧叶片光合作用的变化。结果显示:0.5%乙磷铝SL注干施药7 d后,乙磷铝已传导至香榧的根、干、枝、叶等部位,枝干及根部乙磷铝含量分别为0.51、0.15 mg/kg;施药3年对香榧根腐病的防治效果达89.41%;乙磷铝注干施药,可以增加香榧叶片的光合色素和叶绿素含量,降低热耗散量和类胡萝卜素含量,增强叶片的光合作用,使叶片萌发正常、复壮复绿。综上,乙磷铝注干施药后,在香榧体内可双向传导,有效防治香榧根腐病。To elucidate the systemic distribution of fosetyl-aluminum in Torreya grandis and its field efficacy against root rot,HPLC-MS was employed to trace the presence of the compound across different parts of three-year-old T.grandis at 7,14,and 21 days after trunk injection.A 0.5%SL was applied to 13-year-old T.grandis through trunk injection,once annually in mid-March,over a 3-year period.At the end of the third year,the residue levels of fosetyl-aluminum in different T.grandis tissues and changes in leaf photosynthesis activity were assessed.Seven days after the 0.5%fosetyl-aluminum SL trunk injection,the compound was systemically distributed to the roots,stems,branches,and leaves,with concentrations reaching 0.51 mg/kg in the branches and stems,and 0.15 mg/kg in the roots.The three-year application achieved a remarkable 89.41%control efficacy against root rot in T.grandis.Furthermore,the trunk injection of fosetyl-aluminum increased photosynthetic pigments,including chlorophyll,while reducing heat dissipation and carotenoid content in the leaves,thereby enhancing photosynthetic capacity.This led to normal leaf sprouting,rejuvenation,and re-greening.Collectively,fosetyl-aluminum,when applied via trunk injection,can move bi-directionally within T.grandis and is an effective treatment for root rot control.

关 键 词：香榧根腐病 注干施药 乙磷铝 传导分布 防治效果 

分 类 号：S436.44[农业科学—农业昆虫与害虫防治]