不同类型杀虫剂对黄花菜花蓟马的室内毒力与田间防效

Indoor Toxicity and Field Control Effects of Different Types of Insecticides on Frankliniella intonsa(Trybom)of Hemerocallis citrina Baroni

为筛选出高效防控黄花菜花蓟马(Frankliniella intonsa)的有效药剂,采用叶管药膜法测定17种杀虫剂对花蓟马的室内毒力,并对其中毒力较高的11种杀虫剂展开田间药效试验。室内毒力测定结果表明:60 g/L乙基多杀菌素SC和10%多杀霉素SC对花蓟马成虫的毒力最高,其相对毒力指数分别为4 744.20和3 184.11;而呋虫胺、四唑虫酰胺、氟啶虫酰胺和高效氯氟氰菊酯的毒力较低。田间药效试验结果表明:11种杀虫剂对花蓟马的田间防效呈现先上升后下降的趋势,药后1 d,乙基多杀菌素处理对花蓟马的速效性最佳,防治效果为72.18%,药后3 d,各药剂处理对花蓟马的控制作用均有所上升,其中噻虫嗪和虫螨腈处理对花蓟马的防治效果最好,分别为78.09%和77.51%。可见,乙基多杀菌素和虫螨腈对花蓟马的毒杀作用和田间防效较高,宜作为防治花蓟马的首选药剂,溴氰虫酰胺、阿维菌素和噻虫嗪可作为交替使用的药剂,不推荐使用螺虫乙酯、氟啶虫胺腈、苦参碱和双丙环虫酯用于防治花蓟马。

To identify effective insecticides for controlling Frankliniella intonsa(Trybom)on Hemerocallis citrina Baroni,the indoor toxicity of 17 insecticides were evaluated using the leaf tube film method and the field control efficacy of 11 of these insecticides were assessed through spraying.Results showed that 60 g/L spinetoram SC and 10%spinosad SC exhibited the highest toxicity to adult thrips,with relative toxicity indices of 4744.20 and 3184.11,respectively.In contrast,dinotefuran,tetraniliprole,flonicamid,and lambda-cyhalothrin demonstrated lower toxicity.Field trials revealed that the control efficacy of the 11 insecticides initially increased and then decreased.One day after application,spinetoram showed the most rapid effect with a control rate of 72.18%.Three days after application,all treatments improved in efficacy,with thiamethoxam and chlorfenapyr achieving the highest control rates of 78.09%and 77.51%,respectively.Therefore,spinetoram and chlorfenapyr are recommended as the primary insecticides for managing flower thrips,while cyantraniliprole,abamectin,and thiamethoxam can be used alternately.Conversely,spirotetramat,flonicamid,matrine,and cycloxaprid are not recommended.