Landscape simplification increases the risk of infestation by the polyphagous pest Helicoverpa armigera for walnut, a novel marginal host

Yang, Long; Liu, Haining; Pan, Yong‐Bao; Li, Haiqiang; Lu, Yanhui

doi:10.1007/s10980-022-01486-w

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…The cotton bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae), is a polyphagous agricultural pest that feeds on a wide range of host plants, including cotton, chickpea, tomato, tobacco, corn, sesame, hemp, sun ower, peanut, okra and soybean (Fitt 1989;Smith 1992;Naseri et al 2010;; Cunningham and Zalucki 2014; Tay et al 2017), causing serious economic losses to agriculture worldwide (Wu et al 2017; Yang et al 2022). Generalist herbivores such as H. armigera must continually shift to new, alternative, and nutritionally challenging host plants as availability or quality of other hosts declines.…”

Section: Introductionmentioning

confidence: 99%

“…In China, H. armigera has been reported to shift onto some marginal hosts when preferred host plants become scarce either due to seasonality or changes in cultivation or land use patterns. The increased cultivation of high-value horticultural crops in areas formerly dominated by cotton production has led to greater exposure of some marginal hosts to H. armigera feeding (Yang et al 2022). Southern Xinjiang Uygur Autonomous Region, China has an arid or semi-arid climate that is ideal for cultivating high-quality fruit of various species, including walnut (Juglans regia), jujube (Ziziphus jujube), apple (Malus pumila), grape (Vitis vinifera), pear (Pyrus sinkiangensis), and apricot (Prunus armeniaca).…”

Section: Introductionmentioning

confidence: 99%

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The detoxification role of P450 genes implicated in adaptation of Helicoverpa armigera to walnut phytochemistry

Li,

Huang,

Yang

et al. 2024

Preprint

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In northwest China, changes in cultivation patterns and the scarcity of preferred hosts have forced Helicoverpa armigera to feed on the marginal host walnut (Juglans regia). However, the mechanisms allowing this adaptation remain poorly understood. Here, we investigated the behavioral, physiological, and molecular mechanisms underlying the local adaptation of this pest to walnut fruits. Compared to the kernel, the green husk and shell generally contained higher levels of phytochemicals and had greater impact on larval feeding preference, fitness, and cytochrome P450 activity. These negative effects were further supported by a larger number of upregulated detoxification genes in insects fed green husks or shells based on transcriptome sequencing. Together, these data suggest that P450 genes (such as LOC110371778) may be crucial to H. armigera adaptation to the phytochemicals of walnuts. Our findings provide significant insight into the adaptation of cotton bollworm to walnut, an alternative host of lower quality.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The detoxification role of P450 genes implicated in adaptation of Helicoverpa armigera to walnut phytochemistry

Li,

Huang,

Yang

et al. 2024

Preprint

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Leveraging satellite observations to reveal ecological drivers of pest densities across landscapes

Emery,

Rosenheim,

Chaplin-Kramer

et al. 2024

Science of The Total Environment

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Analysis of Thaumatotibia leucotreta (Lepidoptera: Tortricidae: Olethreutinae) mitochondrial genomes in the context of a recent host range expansion

Vossenberg¹,

Noort²,

Hooiveld-Knoppers³

et al. 2023

BMC Ecol Evo

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Background The false codling moth (FCM), Thaumatotibia leucotreta (Meyrick, 1913), is a significant pest of various important economic crops and is a EU quarantine pest. In the last decade the pest has been reported on Rosa spp. In this study we determined whether this shift occurred within specific FCM populations across seven eastern sub-Saharan countries or whether the species opportunistically switches to this novel host as it presents itself. To achieve this, we assessed the genetic diversity of complete mitogenomes of T. leucotreta specimens intercepted at import and analysed potential linkages with the geographical origin and host species. Results Genomic, geographical and host information were integrated into a T. leucotreta Nextstrain build which contains 95 complete mitogenomes generated from material intercepted at import between January 2013 and December 2018. Samples represented seven sub-Saharan countries and mitogenomic sequences grouped in six main clades. Discussion If host strains of FCM would exist, specialization from a single haplotype towards the novel host is expected. Instead, we find specimens intercepted on Rosa spp. in all six clades. The absence of linkage between genotype and host suggests opportunistic expansion to the new host plant. This underlines risks of introducing new plant species to an area as the effect of pests already present on the new plant might be unpredictable with current knowledge.

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Landscape simplification increases the risk of infestation by the polyphagous pest Helicoverpa armigera for walnut, a novel marginal host

Cited by 5 publications

References 56 publications

The detoxification role of P450 genes implicated in adaptation of Helicoverpa armigera to walnut phytochemistry

The detoxification role of P450 genes implicated in adaptation of Helicoverpa armigera to walnut phytochemistry

Leveraging satellite observations to reveal ecological drivers of pest densities across landscapes

Analysis of Thaumatotibia leucotreta (Lepidoptera: Tortricidae: Olethreutinae) mitochondrial genomes in the context of a recent host range expansion

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