Host plants for mealybugs (Hemiptera: Pseudococcidae) in grapevine crops

Lopes, F. C. F.; Oliveira, José Vargas de; Oliveira, J. E. de M.; Oliveira, Martin Duarte de; Souza, Adriana Maria de

doi:10.1590/1983-40632019v4954421

Cited by 35 publications

(1 citation statement)

References 15 publications

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“…M ealybugs (Hemiptera: Coccoidea: Pseudococcidae) are globally distributed, highly aggressive pests of many commercial, non-commercial, and ornamental plants [1][2][3] . They are a diverse group of sap-sucking insects, with at least 32 genera and around 105 species 4 .…”

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Fatty acyl-CoA reductase influences wax biosynthesis in the cotton mealybug, Phenacoccus solenopsis Tinsley

Tong

Wang

et al. 2022

Commun Biol

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Mealybugs are highly aggressive to a diversity of plants. The waxy layer covering the outermost part of the integument is an important protective defense of these pests. However, the molecular mechanisms underlying wax biosynthesis in mealybugs remain largely unknown. Here, we analyzed multi-omics data on wax biosynthesis by the cotton mealybug, Phenacoccus solenopsis Tinsley, and found that a fatty acyl-CoA reductase (PsFAR) gene, which was highly expressed in the fat bodies of female mealybugs, contributed to wax biosynthesis by regulating the production of the dominant chemical components of wax, cuticular hydrocarbons (CHCs). RNA interference (RNAi) against PsFAR by dsRNA microinjection and allowing mealybugs to feed on transgenic tobacco expressing target dsRNA resulted in a reduction of CHC contents in the waxy layer, and an increase in mealybug mortality under desiccation and deltamethrin treatments. In conclusion, PsFAR plays crucial roles in the wax biosynthesis of mealybugs, thereby contributing to their adaptation to water loss and insecticide stress.

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confidence: 99%