Impact of Triflumuron on Halyomorpha halys (Hemiptera: Pentatomidae): Laboratory and Field Studies

Halyomorpha halys, (the brown marmorated stink bug, BMSB), is a high-concern invasive species causing severe damage to orchards in many countries outside its native Asian range. Control options matching both effectiveness and sustainability are currently lacking. Inhibitors of chitin biosynthesis mi...

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Bibliographic Details
Published in:Journal of economic entomology 2021-08, Vol.114 (4), p.1709-1715
Main Authors: Masetti, Antonio, Depalo, Laura, Pasqualini, Edison
Format: Article
Language:English
Subjects:
Aging
Analysis
Bioassays
Biosynthesis
brown marmorated stink bug
Chitin
Field tests
Fruit
Fruits
Halyomorpha halys
HORTICULTURAL ENTOMOLOGY
inhibitors of chitin biosynthesis
Insecticides
integrated pest management
Introduced species
Invasive species
Laboratories
Mortality
Neurotoxicity
Orchards
Pharmaceutical industry
Physiological aspects
Plants
reduced-risk insecticides
Sprays
Stink bugs
Triflumuron
Urea
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Summary:Halyomorpha halys, (the brown marmorated stink bug, BMSB), is a high-concern invasive species causing severe damage to orchards in many countries outside its native Asian range. Control options matching both effectiveness and sustainability are currently lacking. Inhibitors of chitin biosynthesis might be exploited for integrated management programs because of the overall better ecotoxicological profile in comparison with most neurotoxic insecticides used so far against BMSB. In this study, the activity of triflumuron, a benzoylphenyl urea hampering chitin biosynthesis, was tested on BMSB in laboratory and field conditions. In laboratory bioassays, the insecticide was sprayed on potted peach plants (30 cm high) and residues were aged in a glasshouse for 0, 7, 14, and 21 d. Then, third-instar bugs were placed on the plants and continuously exposed to residues. Mortality was scored after 7, 14, and 21 d exposure.Triflumuron caused significantly higher mortality on BMSB nymphs in comparison with water controls at all aging periods. Moreover, aging of residues up to 21 d did not cause any significant reduction of activity. Field experiments were also carried out in 2019 in eight pear orchards. Injuries to fruits at harvest were compared between plots where triflumuron was added to insecticide sprays against BMSB and control plots managed exactly in the same way but without any triflumuron treatment. An overall mean of 9.99 ± 1.98% stink bug injured fruits was detected in plots managed with the strategy including triflumuron, whereas 19.45 ± 3.55% of fruits were injured in plots assigned to controls.
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/toab102