What herbicide works well for weed control in Salvia miltiorrhiza fields

Most of the current cultivation methods for Salvia miltiorrhiza use seed propagation. It is a biennial plant with a relatively long growth cycle, so weed control in the field is very important. So what herbicide should be used for Salvia miltiorrhiza?

1. Trifluralin: For chemical weed control, trifluralin is used for soil treatment during the weed germination period. Because the dosage is small and trifluralin is a low-grade herbicide, its impact on the growth of Salvia miltiorrhiza is relatively small, but trifluralin's pharmacological effect is only relatively good against monocotyledonous weeds, while its efficacy against dicotyledonous broadleaf weeds is relatively poor and weed killing is not thorough. Growers urgently hope for an herbicide that can both control grass-family broadleaf weeds relatively well and have no side effects on Salvia miltiorrhiza.

2. Quizalofop-p-ethyl: Among the two optical isomers, the inactive L-isomer is removed, leaving the active isomer (R-isomer). Therefore, its mechanism of action and weed-killing spectrum are the same as those of quizalofop, but because plant absorption and mobility are improved, it acts quickly, has stable efficacy, and is not easily affected by environmental conditions such as rain, temperature, and humidity. The solution is absorbed through weed stems and leaves, conducts bidirectionally upward and downward within the plant, accumulates at the tips and intercalary meristems, inhibits the synthesis of cellular fatty acids, and thereby causes the weeds to die.

For Salvia miltiorrhiza, it is best to use traditional manual pulling for weed control, as this is more beneficial to the growth of Salvia miltiorrhiza. The effect of manual pulling for Salvia miltiorrhiza is relatively low, and it is prone to recurrence. Both weed control methods have their own advantages.