I planted crape myrtle in the field ... that is, zinnia ... can I use herbicides? What kind of herbicide can I use? .. be more specific ... give points.

Selective herbicides, such as Gaicaoneng and quizalofop-p-ethyl, can only kill monocotyledonous crops, which can greatly reduce the labor force and will not affect Lagerstroemia indica, but the dicotyledonous weeds in them will not die, so manual weeding must be used.

If Lagerstroemia indica has grown tall, glyphosate and paraquat can be sprayed to kill weeds, and be careful not to spray them on crops to prevent phytotoxicity.