Effect of different herbicides on weed control and yield of Panicum miliaceum

This study aimed to explore the control effect of different herbicides on the field and on the yield of proso millet (Panicum miliaceum) and provide a basis for the safe use of herbicides in the proso millet field. The proso millet variety “Yumi-2” was used as the material for the experiment. The pre-seedling herbicide 330 g·L⁻¹ pendimethalin cream and 10% monosulfuron wettable powder were selected after sowing. In the three-leaf stage of proso millet, 36% carfentrazone-tribenuron wettable powder and 55% of two methyl sodium wettable powder were sprayed. Each herbicide was sprayed at the recommended dosage. After 15 days of spraying, the control effect of fresh weight on weeds was investigated. After heading stage, we investigated the effects of herbicides on dry matter accumulation, chlorophyll content of functional leaves, agronomic traits, and yield. The results showed that monosulfuron and two methyl sodium have the best control effects on weeds, and the fresh weight inhibition rate is over 99.7% and over 88.4%; the dry matter accumulation and the relative content of functional chlorophyll in the ground part of proso millet have different degrees of influence. Four herbicides increased the main ear weight of proso millet and significantly increased the yield of proso millet (P < 0.05). Monosulfuron and two methyl sodium levels increased the most significantly, reaching 271.66% and 275.34%, respectively. The herbicide monosulfuron and two methyl sodium had the best weed control, and the fresh weight control effect was higher in the whole growth period, and the yield of proso millet increased significantly. In summary, these two herbicides are the safest herbicides for proso millet fields.