氟吡菌酰胺对南方根结线虫的作用效果  

Effect of fluopyram on root-knot nematode Meloidogyne incognita

作　　者：迟元凯 叶梦迪 赵伟 曹舜 汪涛 戚仁德 Chi Yuankai;Ye Mengdi;Zhao Wei;Cao Shun;Wang Tao;Qi Rende(Institute of Plant Protection and Agro-products Safety,Anhui Academy of Agricultural Sciences,Hefei 230031,Anhui Province,China;College of Plant Protection,Anhui Agricultural University,Hefei 230036,Anhui Province,China)

机构地区：[1]安徽省农业科学院植物保护与农产品质量安全研究所,合肥230031 [2]安徽农业大学植物保护学院,合肥230036

出　　处：《植物保护学报》2019年第6期1364-1370,共7页Journal of Plant Protection

基　　金：安徽省农业科学院院长青年创新基金项目(17B1119);国家自然科学基金(31721774)

摘　　要：为明确琥珀酸脱氢酶抑制剂类(SDHI)杀线剂氟吡菌酰胺对南方根结线虫Meloidogyne incognita的作用效果,在室内盆栽条件下研究不同剂量、不同施药时期该药剂对线虫侵入、根结和雌虫数量以及产卵量的影响。结果显示:在黄瓜幼苗移栽前进行土壤处理,氟吡菌酰胺施用剂量为31.25μg/株时,每株2龄幼虫侵染数量和根结数量分别为11.3条和6.4个,相比对照处理显著减少;在接种南方根结线虫后0~11 d,以施药量为125μg/株的氟吡菌酰胺进行灌根时,可大幅减少根结数量,每株根结数量减少至12.8~22.5个,同时,施药后根系内未见成熟雌虫产生;在接种后15 d,以施药量为250μg/株的氟吡菌酰胺进行灌根时,可大幅减少根内成熟雌虫数量,每株雌虫数量减少至16.9条;接种后20 d施药,施药量为500μg/株时可大幅减少根部产生的根结线虫卵块数量,每株卵块数量减少至18.9个。表明氟吡菌酰胺能抑制土壤内线虫对黄瓜根系的侵染并抑制根内线虫发育,但随着施药时间的推迟,防治已侵入根系的线虫需增加施药剂量,在生产上使用氟吡菌酰胺防治根结线虫病应在作物移栽前或线虫侵染早期施药效果更好。In order to further clarify the effect of fluopyram, a succinate dehydrogenase inhibitor(SDHI) nematicide, on root-knot nematode Meloidogyne incognita, the efficacy of the agent on nematode infection, root galls formation, females and eggs production were investigated under the condition of pot culture. The results showed that treating soil with 31.25 μg/plant of fluopyram, the number of nematode invasion and galls of cucumber roots were reduced to 11.3 and 6.4 per plant respectively. Root-irrigation with fluopyram 125 μg/plant within 0-11 days after nematode inoculation, the number of galls was reduced to 12.8-22.5 per plant, and none female adult was observed in plant roots. Root-irrigation with fluopyram 250 μg/plant at the 15 th day after nematode inoculation, the number of female adults was reduced to 16.9 per plant. Root-irrigation with fluopyram 500 μg/plant at the 20 th day after nematode inoculation, the number of egg masses were reduced to 18.9 per plant. The results indicated that fluopyram could suppress both infection and development of M. incogntia, however, with the delayed application of fluopyram, it was necessary to increase the dosage to control M. incogntia in plant roots.Therefore, to control root-knot nematode with fluopyram, application should be carried out before transplantation or at early infection stage of root knot nematode.

关 键 词：南方根结线虫 氟吡菌酰胺 侵染 作用效果 

分 类 号：S432.45[农业科学—植物病理学]