INFLUENCE OF IRRIGATION ON APHID INFESTATION IN MAIZE
Abstract
Maize (Zea mays L.) is a crucial crop for both Ukraine and the global agricultural sector, serving as a key staple and export commodity. Ukraine ranks among the top ten maize producers worldwide, with annual production reaching 27-35 million tons and exports of 20-25 million tons. Irrigation significantly enhances maize yield, potentially increasing productivity from 6,8-7,0 tons per hectare to 12-15 tons per hectare. Given the importance of maize for food security, economic stability, and international trade, understanding factors that influence its productivity is essential. One of the major challenges in the Steppe, Forest-Steppe, and Polissia regions of Ukraine is the irregular water regime, which limits the full utilization of soil potential. Effective irrigation management not only improves water use efficiency and soil health but also promotes the proliferation of beneficial organisms, contributing to increased crop resilience.
This study, conducted from 2020 to 2023 in the Kyiv region, investigated the development and population dynamics of aphids (Aphididae spp.) on irrigated and non-irrigated maize, alongside the role of natural predators in regulating aphid abundance. Experimental plots of 50 m² were established using a randomized design with four replications. The maize hybrid P9074 (FAO 330) was grown under controlled irrigation with water-jet sprinklers, while control plots relied on natural precipitation. Meteorological data, including air temperature, precipitation, and the Selyaninov hydrothermal coefficient (SHC), were recorded to assess their impact on aphid population density.
Results indicated that aphid infestation was higher on irrigated plots, particularly during the tassel emergence and flowering stages. Average infestation in irrigated areas reached 47,8 % during maize ripening, compared to 42,8 % in non-irrigated fields. A moderate negative correlation was found between precipitation and aphid infestation (r = -0,34), while a weak positive correlation existed with air temperature (r = 0,19). Irrigation was found to modify the microclimate significantly, reducing air temperature by 2,4-6,1 °C and increasing humidity to 78-100 %, depending on timing and water volume, with nocturnal irrigation producing the most gradual changes.
In addition, irrigation enhanced the abundance of natural aphid predators. Populations of Coccinellidae and Chrysopidae were 2,2 and 1,7 times higher, respectively, in irrigated fields compared to non-irrigated plots. Key predator species, including Chrysopa carnea Steph., played a critical role in controlling aphid populations, demonstrating that irrigation can indirectly support biocontrol mechanisms.
Overall, the study highlights that irrigation not only increases maize productivity but also influences aphid population dynamics and predator activity. These findings emphasise the importance of integrated water and pest management strategies to optimise crop yields and strengthen the ecological resilience of maize agroecosystems in Ukraine.
References
2. Lykhovyd, P., Ushkarenko, Vi., Lavrenko S., & Lavrenko N. (2019). The economic efficiency of sweet corn production in the south of Ukraine depending on the agrotechnology. AgroLife Scientific Journal, 8(2), 71-75. Retrieved from: https://agrolifejournal.usamv.ro/index.php/agrolife/article/view/246.
3. Didur, I., & Bogomaz, S. (2023). Suchasnyy stan i perspektyvy vyroshchuvannya kukurudzy v Ukrayini [Current state and prospects of maize growing in Ukraine]. Silʹsʹke hospodarstvo ta lisivnytstvo [Agriculture and Forestry], 153-161. DOI: 10.37128/2707-5826-2023-2. [in Ukrainian].
4. Markova, N., Smirnova, I., Zadorozhnii, Yu., & Horbunov, M. (2025). Irrigation systems as a factor in increasing productivity in agricultural regions of Ukraine. Scientific Horizons, 28(4), 107-119. https://doi.org/10.48077/scihor4.2025.107.
5. Didenko N.O. (2024). Climate-smart agricultural practices. Sustainable Soil and Water Management Practices for Agricultural Security, 1–20. https://doi.org/10.4018/979-8-3693-8307-0.ch001.
6. Gebretsadik, K.G., Liu, Z., Yang, J., Liu, H., Qin, L.A., Zhou, Y., Guo, E., Song, X., Gao, P., Xie, Y., Vincent, N., Tran, L.-S.P., & Sun, X. (2025). Plant-aphid interactions: recent trends in plant resistance to aphids. Stress Biology, 5, 1–28 https://doi.org/10.1007/s44154-025-00214-z.
7. Mahmoud, H., El-Rahman, S., Mahbob, M., & Ahmed, S. (2021). Seasonal abundance of the most important insect pests of maize and their natural enemies in Egypt. Polish Journal of Entomology. 90, 27-40. 10.5604/01.3001.0014.8151.
8. Dampc J., Mołoń M., Durak T., & Durak R. (2021) Changes in Aphid-Plant Interactions under Increased Temperature. Biology. 10(6):480. https://doi.org/10.3390/biology10060480.
9. Kuroli, G., & Lantos, Z.. (2002). Flight activity and abundance of maize-colonizing aphids based on a long-term survey. Novenytermeles, 51, 657-674. Retrieved from: https://www.researchgate.net/publication/287857124.
10. Sana, B., Murtaza, G., Mahmood, H., Amjad Basir, M., Batool, M., Nasar, M.S., Aziz, I., Alajmi, R.A., Mehmood, A., Al-Zuaibr, F., Hashem, M., Alasmari, A., Alshehri, M.A., Yahia Qattan, M., Abbas, R., & Alamri, S. (2022). Population dynamics of aphids and its predators along with its management. Journal of King Saud University – Science, 34:102024. https://doi.org/10.1016/j.jksus.2022.102024.
11. Nalam, V., Louis, J., & Shah, J. (2019). Plant defense against aphids, the pest extraordinaire. Plant Science, 279, 96–107. https://doi.org/10.1016/j.plantsci.2018.04.027.
12. Bing, J.W., Guthrie, W.D., Dicke, F.F., & Obrycki, J.J. (1991). Seeding Stage Feeding by Corn Leaf Aphid (Homoptera: Aphididae): Influence on Plant Development in Maize. Journal of Economic Entomology, 84, 625–632. https://doi.org/10.1093/jee/84.2.625.
13. Pingault L, Varsani S, Palmer N, Ray S, Williams WP, Luthe DS, Ali JG, Sarath G, & Louis J. (2021). Transcriptomic and volatile signatures associated with maize defense against corn leaf aphid. BMC Plant Biol., 21(1):138. DOI: 10.1186/s12870-021-02910-0.
14. Melnychuk, F., Alekseeva, S., Hordiienko, O., Nychyporuk, O., Borysenko, A., & Didenko, N. (2024). The efficiency of unmanned aerial vehicles application for repeseed productivity in Ukraine. Research in Agricultural Engineering, 70(3), 167–173. https://doi.org/10.17221/87/2023-RAE.
15. Trybel, S.O., Siharova, D.D., Sekun, M.P., & Ivashchenko, O.O. (2001). Metodyky vyprobuvannya i zastosuvannya pestytsydiv [Pesticide testing and application methods]. Publisher: Svit, Kyiv, Ukraine, 448 [in Ukrainian].
16. Carena, M., & Glogoza, Ph. (2004). Resistance of maize to the corn leaf aphid: A review. Maydica. 49, 241-254. Retrieved from:
https://www.researchgate.net/publication/285991974_Resistance_of_maize_to_the_corn_leaf_aphid_A_review.
17. Csorba, A.B., Dinescu, S., Pircalabioru, G.G., Fora, C.G., Laxdale, H.D., & Balog, A. (2025). Corn leaf aphid, Rhopalosiphum maidis (Fitch) (Hemiptera: Aphididae) population expansion influenced by endosymbiotic bacterial diversity along a gradient of maize management and climate conditions. Symbiosis, 95(3), 363–374. https://doi.org/10.1007/s13199-025-01054-1.
18. Tali, M.K., Mahla, M.K., Chhangani, G., & Singh, B. (2018). Effect of Intercropping on Seasonal Incidence of Maize Aphid, Phopalosiphum maidis. International Journal of Current Microbiology and Applied Sciences, 7(08), 2984–2988. https://doi.org/10.20546/ijcmas.2018.708.316.
19. Csorba, A.B., Dinescu, S., Pircalabioru, G.G., Fora, C.G., Balint, J., Loxdale, H.D., & Balog A. (2024). Aphid adaptation in a changing environment throught thei bacterial endosymbionts: overview, including a new major cereal pests (Rhopasiphum maidis (Fitch) scenario. Symbiosis, 93(2), 139–152. https://doi.org/10.1007/s13199-024-00999-z.
