Efficacy of Methyl Bromide for Control of Different Life Stages of Stored-Product Psocids

The psocid species Liposcelis paeta Pearman, Liposcelis entomophila (Enderlein), Liposcelis decolor (Pearman), Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae), and Lepinotus reticulatus Enderlein (Psocoptera: Trogiidae) were evaluated in laboratory bioassays to determine their suscep...

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Bibliographic Details
Published in:Journal of economic entomology 2015-06, Vol.108 (3), p.1422-1428
Main Authors: Athanassiou, Christos G, Hasan, M. Mahbub, Phillips, Thomas W, Aikins, M. Jamie, Throne, James E
Format: Article
Language:English
Subjects:
adults
Animals
Bioassays
Decoloring
Dose-Response Relationship, Drug
Eggs
Food Contamination - prevention & control
fumigant
Fumigation
Hydrocarbons, Brominated
Insect Control
Insecta - growth & development
Insecticide Resistance
Insecticides
Lepinotus
Lepinotus reticulatus
Liposcelididae
Liposcelis
Liposcelis bostrychophila
Liposcelis entomophila
Methyl bromide
Mortality
Nymph - growth & development
nymphs
Ovum - growth & development
Psocoptera
Species
STORED-PRODUCT
Trogiidae
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Summary:The psocid species Liposcelis paeta Pearman, Liposcelis entomophila (Enderlein), Liposcelis decolor (Pearman), Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae), and Lepinotus reticulatus Enderlein (Psocoptera: Trogiidae) were evaluated in laboratory bioassays to determine their susceptibility to six concentrations of methyl bromide (0.027, 0.113, 0.280, 0.393, 0.452, and 0.616 g/m3) after 48 h of exposure at 27.5°C. The life stages that were evaluated were adults (for all species), nymphs (for all species except Lep. reticulatus), and eggs (for L. entomophila, L. decolor, and L. bostrychophila). Adults and nymphs were very susceptible, and complete mortality was recorded at concentrations between 0.027 and 0.280 g/m3. In contrast, eggs were by far more tolerant than adults and nymphs for all species tested. At 0.027 g/m3, mortality did not exceed 53%, while survival was high even at 0.113 g/m3. Complete (100%) egg mortality was recorded at 0.393 g/m3 for L. decolor and at 0.452 g/m3 for L. entomophila and L. bostrychophila; concentrations estimated to give 99% mortality for eggs of these three species were 0.710, 1.044, and 0.891 g/m3, respectively. These results show that stored-product psocids are susceptible to methyl bromide, but concentrations of ≥0.452 g/m3 should be used to control all life stages.
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/tov069