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Research Article Open access CC BY 4.0

Influence of 2,4-dichloro Phenoxy Acetic Acid on Seeds Germination and Early Growth of Mesquite (Prosopis juliflora Swarz) DC Seedlings

Eltayeb Ahmed Hamad Suliman, Sayda Omer Elhewairis, Salah Atom Elamin

Asian Research Journal of Agriculture · pp. 6–16 · Published 27 Feb 2023

10.9734/arja/2023/v16i1378

Abstract

This study was conducted to evaluate the effect of 2,4-dichloro phenoxy acidic acid (2,4-D) on seed germination and the early growth of mesquite (Prosopis juliflora) seedlings. The three sizes of mesquite at the flowering stage (small, medium, and large) were treated with 2,4-D at different rates (0, 6×103, 12×103, 18×103 and 24×103 mg a.i. / L) dissolved in two solvents (diesel or water), the application method basal bark treatment was used in the two different seasons. The results showed that: the three factors (2,4-D rates, tree sizes, and solvent types) significantly decreased germination percentage with the increase of 2,4-D rate dissolved in diesel with all sizes of trees, while the emergence percentage, radical length, and shoot height were significantly decreased as 2,4-D rate increase dissolved in diesel or water. In the winter season, the root length of seedlings raised from seeds collected from the three tree sizes treated with 2,4-D dissolved in water was significantly decreased as a 2,4-D rate increased, while in the rainy season, the root length was affected with 2,4-D dissolved in diesel. In addition, the effect of 2,4-D rates and solvent types was evaluated for all parameters, the results found that: 2,4-D dissolved in diesel significantly decreased germination percent than the corresponding rates dissolved in water. Emergence percentage and shoot height and radical length were significantly decreased with 2,4-D dissolved in diesel or water compared to their control. In the winter season, the root length is affected by 2,4-D dissolved in water, while in the rainy season affected by 2,4-D dissolved in diesel.

Mesquite seedlings emergence 2,4-D shoot height and roots length germination radical length

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