Indoor Toxicity Determination and Field Control Efficacy Test of Five Insecticides Against Spodoptera frugiperda

doi:10.11924/j.issn.1000-6850.casb2021-0565

Abstract

Abstract:

In order to select effective and safe insecticides for controlling Spodoptera frugiperda, larvae of S. frugiperda were used as experimental materials in this study. The indoor toxicity of five insecticides was determined by impregnation method, and field control tests were conducted. The results of indoor toxicity test showed that the five insecticides had different indoor toxicities to the third instar larvae of S. frugiperda, and their LC₅₀ values from low to high were: 5% emamectin benzoate ME<60 g/L spinetoram SC<10% chlorfenapyr SC<40% phoxim EC<90% dipterex SP. The results of field control efficacy test showed that all the five insecticides had good control effects on the larvae of S. frugiperda. The control efficacies of 60 g/L spinetoram SC, 10% chlorfenapyr SC and 40% phoxim EC were 100% at 72 hours after the treatment, and the control efficacies of 5% emamectin benzoate ME and 90% dipterex SP were more than 90% at 72 hours after the treatment. Therefore, these five insecticides can be used as effective agents to control S. frugiperda.

Key words: Spodoptera frugiperda, insecticide, indoor toxicity determination, LC₅₀, field control efficacy

CLC Number:

S482.3

WANG Jiazhe, YUAN Dongzhen, YANG Yiwei, WEN Yaodong, WEI Peiyao, CHEN Zhijie, LI Yingmei, ZHANG Feng, ZHANG Qi, HONG Bo. Indoor Toxicity Determination and Field Control Efficacy Test of Five Insecticides Against Spodoptera frugiperda[J]. Chinese Agricultural Science Bulletin, 2022, 38(12): 119-123.

Figures/Tables 3

References 20

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药剂	生产厂家	稀释倍数/倍
5%甲维盐ME	深圳诺普信农化股份有限公司	7500
60 g/L乙基多杀菌素SC	中农立华农用化学品有限公司	750
90%敌百虫SP	山东大成生物化工科技有限公司	900
10%虫螨腈SC	山东百信生物科技有限公司	500
40%辛硫磷EC	连云港立本作物科技有限公司	1000

药剂	生产厂家	稀释倍数/倍
5%甲维盐ME	深圳诺普信农化股份有限公司	7500
60 g/L乙基多杀菌素SC	中农立华农用化学品有限公司	750
90%敌百虫SP	山东大成生物化工科技有限公司	900
10%虫螨腈SC	山东百信生物科技有限公司	500
40%辛硫磷EC	连云港立本作物科技有限公司	1000

药剂	时间/h	毒力方程	相关系数	LC₅₀/(mg/L)	95%置信区间
5%甲维盐ME	24 72	y=3.660x+6.082 y=3.486x+6.121	0.988 0.926	0.022 0.018	(0.019,0.025) (0.015,0.020)
60g/L乙基多杀菌素SC	24 72	y=2.540x-1.105 y=3.119x+0.575	0.993 0.865	2.723 0.654	(2.270,3.280) (0.031,1.209)
90%敌百虫SP	24 72	y=2.572x-8.025 y=5.011x-14.282	0.881 0.883	1319.861 708.622	(855.205,4574.238) (317.357,1477.726)
10%虫螨腈SC	24 72	y=2.714x-1.621 y=2.736x-1.376	0.931 0.888	3.956 3.185	(2.382,8.273) (1.359,10.480)
40%辛硫磷EC	24 72	y=2.761x-3.375 y=1.943x-1.498	0.973 0.925	16.680 5.904	(13.818,19.785) (3.533,8.199)

药剂	时间/h	毒力方程	相关系数	LC₅₀/(mg/L)	95%置信区间
5%甲维盐ME	24 72	y=3.660x+6.082 y=3.486x+6.121	0.988 0.926	0.022 0.018	(0.019,0.025) (0.015,0.020)
60g/L乙基多杀菌素SC	24 72	y=2.540x-1.105 y=3.119x+0.575	0.993 0.865	2.723 0.654	(2.270,3.280) (0.031,1.209)
90%敌百虫SP	24 72	y=2.572x-8.025 y=5.011x-14.282	0.881 0.883	1319.861 708.622	(855.205,4574.238) (317.357,1477.726)
10%虫螨腈SC	24 72	y=2.714x-1.621 y=2.736x-1.376	0.931 0.888	3.956 3.185	(2.382,8.273) (1.359,10.480)
40%辛硫磷EC	24 72	y=2.761x-3.375 y=1.943x-1.498	0.973 0.925	16.680 5.904	(13.818,19.785) (3.533,8.199)

药剂	药前虫口数/ (头/10株)	药后24 h		药后72 h
药剂	药前虫口数/ (头/10株)	虫口减退率/%	防效/%	虫口减退率/%	防效/%
5%甲维盐ME	65.0±3.5	85.4±5.1cd	84.8±0.6d	94.7±1.6b	93.4±1.9b
60g/L乙基多杀菌素SC	66.1±4.3	88.7±4.4bc	87.5±0.4c	100.0±0.0a	100.0±0.0a
90%敌百虫SP	51.0±2.1	79.5±3.7d	77.5±0.2e	94.3±6.0b	93.3±0.3b
10%虫螨腈SC	51.1±3.3	94.7±1.9b	93.1±1.0b	100.0±0.0a	100.0±0.0a
40%辛硫磷EC	43.7±0.3	98.4±1.6a	97.4±1.3a	100.0±0.0a	100.0±0.0a
CK	42.5±2.1	9.5±2.2e	-	19.4±0.6c	-