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This study investigates the effects of varying populations of two-spotted spider mites (Tetranychus urticae Koch)
on the growth parameters and yield of summer apple cultivars. Field experiments were conducted to measure the impact
of mite infestations at different density levels on leaf chlorophyll content, fruit growth, leaf area, and overall yield. Results
demonstrated significant negative correlations between mite populations and apple growth metrics. High mite densities
severely decreased leaf chlorophyll content, leaf area, and fruit size, subsequently reducing overall yield. Effective mite
management strategies are necessary to maintain optimal apple production levels.

  • Web Address
  • DOI10.63241/202528akhv
  • Date of creation in the UzSCI system 15-05-2025
  • Read count 97
  • Date of publication 14-05-2025
  • Main LanguageIngliz
  • Pages20-21
English

This study investigates the effects of varying populations of two-spotted spider mites (Tetranychus urticae Koch)
on the growth parameters and yield of summer apple cultivars. Field experiments were conducted to measure the impact
of mite infestations at different density levels on leaf chlorophyll content, fruit growth, leaf area, and overall yield. Results
demonstrated significant negative correlations between mite populations and apple growth metrics. High mite densities
severely decreased leaf chlorophyll content, leaf area, and fruit size, subsequently reducing overall yield. Effective mite
management strategies are necessary to maintain optimal apple production levels.

№ Author name position Name of organisation
1 Rahmanov A.X. xxx Assistent of the Tashkent State Agrarian University
№ Name of reference
1 1. Attia, S., Grissa, K. L., Lognay, G., & Lebdi, K. G. (2021). Acaricide resistance mechanisms and management strategies in Tetranychus urticae. Crop Protection, 140, 105417
2 2. Dermauw, W., Van Leeuwen, T., & Feyereisen, R. (2018). Resistance mechanisms and management strategies in spider mites (Acari: Tetranychidae). Annual Review of Entomology, 63, 483-505.
3 3. Guedes, R. N. C., Roditakis, E., Campos, M. R., Haddi, K., & Bielza, P. (2020). Pesticide resistance in arthropods: Ecology, mechanisms, and management strategies. Insects, 11(12), 877.
4 4. Hoy, M. A. (2020). Biological Control in Agricultural IPM Systems. CRC Press
5 5. Kumar, V., Khan, M. S., Singh, S., & Sharma, A. K. (2022). Eco-friendly management of spider mites (Tetranychus urticae Koch) using botanical acaricides: Recent advances and future prospects. Journal of Environmental Management, 318, 115642
6 6. Monteiro, L. B., Oliveira, R. C., Ferreira, M. D., & Silva, R. A. (2018). Biological control of Tetranychus urticae (Acari: Tetranychidae) in apple orchards. Biological Control, 118, 1-7.
7 7. Rana, R., Sharma, V. K., & Sharma, H. C. (2021). Experimental designs and statistical analyses in horticultural research. Horticultural Reviews, 48, 185-242.
8 8. Van Leeuwen, T., Dermauw, W., Grbić, M., Tirry, L., & Feyereisen, R. (2015). Spider mite control and resistance management: does a genome help?. Pest Management Science, 71(7), 849-856.
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