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Laboratory and field evaluation of maize resistance to the two-spotted spider mite, Tetranychus urticae

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Abstract

Spider mites are some of the most important agricultural pests worldwide, jeopardizing maize production across many continents. However, mechanisms of resistance to spider mite in maize remain unclear. Here, we report data from resistant and susceptible maize varieties, **gke968 and **anyu335 along with their parental lines, and investigate their responses to Tetranychus urticae (Acari: Tetranychidae). A significantly lower female adult mite population and total mite numbers were recorded in the resistant variety, **gke968, compared to **anyu335. Similarly, mite fecundity on **gke968 was substantially lower compared to **anyu335, which could be associated with its highly resistant parental line **g92. Stomatal dimensions also showed a close correlation with the fitness of spider mites on the two maize varieties and four parental lines. Tetranychus urticae population numbers under field conditions showed lower mite densities (numbers per plant) in **gke968 and **g92 (75% and 89% lower, respectively) than the most sensitive line PH6WC, hinting toward a high level of resistance to spider mites in these maize lines. Our study provides new insights for mechanisms of physical defense to spider mites in maize and contributed to the basis for pest control and breeding of maize varieties.

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Acknowledgements

We would like to thank Dr. Ningxing Huang for his help in providing spider mites to start the colony.

Funding

The present study was funded by Sci-Tech Innovative Ability Project from Bei**g Academy of Agriculture and Forestry Sciences (KJCX20200420; KJCX20230417), Bei**g Innovation Team of the Modern Agricultural Research System (BAIC08-2023-YJ02), Bei**g Nova Program (20220484220) and the High-level Returned Talents grant from Ministry of Human Resources and Social Security of the People’s Republic of China.

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Correspondence to Jiuran Zhao or Wen Ren.

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The authors declare that they have no conflict of interest. ND serves as Editor-in-Chief of Journal of Pest Science and was not involved in the review process and decisions related to this manuscript.

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Communicated by Cesar Rodriguez-Saona.

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Di, N., Shi, Z., Harwood, J.D. et al. Laboratory and field evaluation of maize resistance to the two-spotted spider mite, Tetranychus urticae. J Pest Sci (2023). https://doi.org/10.1007/s10340-023-01716-3

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  • DOI: https://doi.org/10.1007/s10340-023-01716-3

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