Viability of Italian ryegrass (Lolium multiflorum) seeds under application of synthetic auxin herbicides

• Published in: Revista Ceres 2022-05, Vol.69 (3), p.323-329
• Main Authors: Novello, Bruna Dal’Pizol, Silva, Diecson Ruy Orsolin da, Cuchi, Marina Luiza, Silva, Álvaro Andre Alba da
• Format: Article
• Language: English
• Subjects: 2,4-D; AGRICULTURE, MULTIDISCIPLINARY; Auxins; Cereal crops; dicamba; emergence; germination; Herbicides; Laboratories; Lolium multiflorum; Lolium perenne; picloram; Plant growth; Progeny; Seed banks; Seeds; vigor; Weed control; Weeds; Wheat
• ISSN: 0034-737X; 2177-3491; 2177-3491
• DOI: 10.1590/0034-737x202269030010

ABSTRACT Italian ryegrass (Lolium multiflorum) is one of the main weeds in the wheat crop, and the application of synthetic auxin herbicides has the potential to reduce seed viability, therefore, restricting the input into the seed bank. [...]2,4-D is recommended in preplanting and post-emergence applications in wheat. [...]Italian ryegrass can invariably be affected by these herbicides over a long period throughout the plant cycle. Italian ryegrass plants have a high seed production capacity of up to 45,000 seeds m-2 (Bararpour et al., 2017); therefore, management strategies aimed at reducing the seed bank of weeds in the soil are important to mitigate the effects of interference on crops (Schaeffer et al., 2020). In this case, weed management strategies with selective and non-selective herbicides to make ryegrass seeds unfeasible has been a more accepted and practiced action aimed at reducing weed infestations (Schaeffer et al., 2020). [...]the application of synthetic auxin herbicides on Italian ryegrass plants can reduce the physiological quality of seeds and the initial growth of progeny plants.