PMID- 36708019 OWN - NLM STAT- MEDLINE DCOM- 20230426 LR - 20230528 IS - 1938-291X (Electronic) IS - 0022-0493 (Linking) VI - 116 IP - 2 DP - 2023 Apr 24 TI - Baseline Susceptibility and Evidence of Resistance to Acetamiprid in Gill's Mealybug, Ferrisia gilli Gullan (Hemiptera: Pseudococcidae). PG - 554-559 LID - 10.1093/jee/toad012 [doi] AB - Gill's mealybug, Ferrisia gilli (Gullan) (Hemiptera: Pseudococcidae), is a major pest of pistachio in California. Insecticide treatment is the primary control method and acetamiprid is widely used to control this pest. However, there have been numerous reports of control failures for F. gilli after field applications of recommended insecticides in recent years. The purpose of this study was to develop a method for routine monitoring of F. gilli susceptibility and quantify current levels of F. gilli susceptibility to acetamiprid. A leaf-dip bioassay method using lima bean leaves was established and baseline susceptibility responses of 5 field populations were determined. Lethal concentrations to kill 50% of population (LC50) for second instar nymphs at 48 h ranged from 0.367 to 2.398 microg(AI)ml-1 of acetamiprid. Similarly, lethal concentrations to kill 90% of population (LC90) for second instar nymphs at 48 h ranged from 2.887 to 10.752 microg(AI)ml-1 of acetamiprid. The F. gilli population collected from Hanford area showed up to 6.5-fold significantly decreased mortality to acetamiprid compared to other populations. The resistance identified in this study, although relatively low, indicates that there has been repeated pressure to select for acetamiprid resistance and resistance levels can further magnify if effective management steps are not taken. The baseline susceptibility established in this study can be used to investigate potential cause of recent acetamiprid failures against F. gilli. In the long-term, results of this study will support the development of resistance management strategies by monitoring shifts in the susceptibility of F. gilli populations. CI - Published by Oxford University Press on behalf of Entomological Society of America 2023. FAU - Bansal, Raman AU - Bansal R AUID- ORCID: 0000-0001-7133-0785 AD - USDA-ARS, San Joaquin Valley Agricultural Sciences Center, Parlier, CA 93648, USA. FAU - Hunter, Wayne B AU - Hunter WB AUID- ORCID: 0000-0001-8603-3337 AD - USDA-ARS, U.S. Horticultural Research Laboratory, Fort Pierce, FL 34945, USA. FAU - Haviland, David R AU - Haviland DR AUID- ORCID: 0000-0002-6282-289X AD - University of California Cooperative Extension, Kern County, Bakersfield, CA 93307, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Econ Entomol JT - Journal of economic entomology JID - 2985127R RN - 5HL5N372P0 (acetamiprid) RN - 0 (Neonicotinoids) RN - 0 (Insecticides) SB - IM MH - Animals MH - *Hemiptera MH - Gills MH - Neonicotinoids MH - *Insecticides/pharmacology MH - Nymph MH - Insecticide Resistance OTO - NOTNLM OT - Gill's mealybug OT - acetamiprid OT - baseline susceptibility OT - insecticide resistance OT - leaf-dip bioassay EDAT- 2023/01/29 06:00 MHDA- 2023/04/26 06:41 CRDT- 2023/01/28 01:42 PHST- 2022/09/30 00:00 [received] PHST- 2023/04/26 06:41 [medline] PHST- 2023/01/29 06:00 [pubmed] PHST- 2023/01/28 01:42 [entrez] AID - 7008430 [pii] AID - 10.1093/jee/toad012 [doi] PST - ppublish SO - J Econ Entomol. 2023 Apr 24;116(2):554-559. doi: 10.1093/jee/toad012.