Факултет АГРАРНО-ИНДУСТРИАЛЕНСерия 1.1 · Земеделска техника и технологии, аграрни науки и ветеринарна медицина. Ремонт и надеждност. Промишлен дизайн. Топлотехника, хидро- и пневмотехника. Екология и опазване на околната среда.

FRI-8.303b-1-AMT&ASVM-07

TOLERANCE OF MAIZE LINE 26A TO SOME POST-EMERGENCE HERBICIDES

Assoc. Prof. Svetlana Stoyanova, PhD

Institute of Agriculture and Seed Science “Obraztsov Chiflik” - Ruse Agricultural Academy, Sofia

E-mail: sstoyanova@uni-ruse.bg

Abstract

A field experiment was conducted at the IASS “Obraztsov chiflik” - Ruse to evaluate the effectiveness and selectivity of maize line 26A in relation to its productivity under different herbicide systems. Six treatment variants were studied, including three post-emergence herbicides - Adengo 465 SC, Laudis OD, and Chemniko 25 SC, applied once or twice at optimal doses with a 20-day interval. The results showed that the applied herbicides ensured yields close to the genetic potential of line 26A, confirming their good selectivity and compatibility with the crop. A positive effect was observed on the main yield structural components, with no statistically significant differences compared to the control variants, indicating the absence of phytotoxic effects. The findings highlight the importance of implementing an integrated weed management approach, combining agronomic and chemical control measures within the entire crop rotation. This contributes to sustainable maize production and reduces the negative impact on the environment.

Keywords

maize, line 26A, herbicides, selectivity, phytotoxicity, yield

REFERENCES

Bao, J., Gao, Y., Li, Y., Wu, S., Li, J., Dong, Z., & Wan, X. (2022). Genetic Analysis and Fine Mapping of ZmGHT1 Conferring Glufosinate Herbicide Tolerance in Maize (Zea mays L.). International journal of molecular sciences, 23 (19), 11481.
Cao, M., Sato, S., Behrens, M., Jiang, W., Clemente, T., & Weeks, D. (2011). Genetic Engineering of Maize (Zea mays) for High-Level Tolerance to Treatment with the Herbicide Dicamba. Journal of Agricultural and Food Chemistry, 59 (11), 5830-5834.
Cotter, J. (2015). Development of Herbicide-Tolerant Maize (T25): Food Safety in Doubt. Greenpeace Research Laboratories Technical Note, 4, 1-4.
Delchev, G., (2021). Efficacy and selectivity of some herbicides in five field crops. Monograph, LAP LAMBERT Academic Publishing, Saarbrücken, Germany, 225.
Dragičević, V., Simić, M., Sečanski, M., Cvijanović, G., & Nišavić, A., (2012). Study of the susceptibility of maize lines to some sulfonylurea herbicides. Genetika, 44 (2), 355-366.
Ganeva, Z., (2016). Discovering statistics using IBM SPSS Statistics. Elestra, 265-427 (Bg)
Goranovska, S., & Kalinova, S. (2018). Influence of herbicide systems over the composition of weeds and grain yield of maize, grown under conditions of North-West Bulgaria. In: Proceedings of national scientific conference with international participation “Ecology and Health”, Plovdiv, 99-103.
Intergovernmental Panel on Climate Change (IPCC), (2001), https://www.ipcc.ch/
Moraes, P., Agostinetto, D., Panozzo, L., Oliveira, C., Vignoto, G., & Markus, C. (2013). Manejo de plantas de cobertura no controle de plantas daninhas e desempenho produtivo da cultura do milho. Semina Ciências Agrárias, 34 (2), 497-508 (Pt).
Nandula, V. (2019). Herbicide Resistance Traits in Maize and Soybean: Current Status and Future Outlook. Plants, 8 (9), 337-346;
Nogueira, C., Correia, N., Gomes, L. & Ferreira, P. (2019). Selectivity of bentazon and nicosulfuron in Crotalaria spectabilis intercropped with maize culture. Revista Caatinga, 32, 381-389.
Paltineanu, C., Tanasescu, N., Chitu, E., & Mihailescu, I. (2007). Relationships Between the De Martonne Aridity Index and Water Requirements of Some Representative Crops, International Agrophysics, 21 (1), 81-93.
Popov, А., Pavlov, К., & Popov, P. (1966). Plant growing: Technical crops, Zemizdat, volume III, Sofia, 449-462 (Bg).
Ravisankar, D., Chinnusamy, C, & Nithya, C. (2017). Weed Management in Herbicide Tolerant Transgenic Maize. Chemical Science Review and Letters, 6 (24), 2364-2372.
Richburg, J. (2019). Evaluation of Crop Tolerance and Weed Control in Corn and Grain Sorghum with Atrazine Replacements. Graduate Theses and Dissertations.
Shanin, Y., (1977). Methodology of Polish Experience. In: Block Method. Zemizdat, Sofia, 65-73 (Bg).
Soukup, J., Jursik, M., Hamouz, P., Holec, J., & Krupka J. (2004). Influence of soil pH, rainfall, dosage, and application timing of herbicide Merlin 750 WG (isoxaflutole) on phytotoxicity level in maize (Zea mays). Plant, Soil and Environment, 50 (2), 88-94.
Stoyanova, S., Ivanov, L. & Ilieva, D. (2021). Tolerance degree of maize hybrid LRL101x26A and its parental forms to Adengo 465SC, Laudis OD and Chemnico 25SC. Journal of Mountain Agriculture on the Balkans, 24 (5), 200-218.
Yu, X., Sun, Y., Lin, C., Wang, P., Shen, Z., & Zhao, Y. (2023). Development of Transgenic Maize Tolerant to Both Glyphosate and Glufosinate. Agronomy, 13 (1), 226-242.