Due to its use in human food, livestock feed and as a raw material in industry, maize is one of the most important crops, both globally and nationally. Romania is one of the European leaders in corn cultivation, being ranked second in EU in 2020. The high degree of weed infestation of croplands requires the use of herbicides applied in an integrated weed control management. Due to the slow growth in the first 4-6 weeks, maize is very sensitive to weed infestation, and due to the low density per square meter, a strong competition in favor of weeds is created from the beginning. In this context, the paper presents data on the efficacy and selectivity of 3 different pendimethalin formulations (EC, SC, CS) applied in pre-emergence and in early post-emergence stage, when maize was at BBCH 13 (3 leaves unfolded). out in 2019 in Romania at Didactic Farm Moara Domnească, Ilfov county. on a brown reddish The herbicide Pendimethalin 33% EC was applied at 3.0, 4.0 and 5.0 l/ha, Pendimethalin 40% SC at 2.0, 3.0 and 4.0 l/ha and Pendimethaline 45.5% CS at 2.0, 2.5 and 3.5 l/ha. In experimental field the predominant weeds were annual monocotyledonous and dicotyledonous: Echinochloa crus-galli (L.) Beauv., Digitaria sanguinalis (L.) Scop., Setaria sp. (L.) Beauv., Chenopodium album (L.), Amaranthus retroflexus (L.), Ambrosia artemisiifolia (L.) and Xanthium orientale subsp. italicum (Moretti) Greuter. Assessments made at 10, 28 and 42 days after treatments demonstrated a good efficacy of the different formulations of herbicide Pendimethalin in control of annual weeds in maize, the best results were obtained at the higher rates. No phytotoxicity symptoms have been shown in the trial
