The flowers in the greenhouse, is this a disease or a bug?

The agricultural technician replied: scale insects. Spray control with buprofezin, veratrine, sodium oleoresin, pyrimidinophosphate and spirozoate ethyl ester.

The agricultural technician replied: scale insects are harmful, it is recommended to use permethrin + bifenthrin, thiazide + cyhalothrin, spirochete ethyl ester combined with orange peel essential oil spray control.

The agricultural technician replied: scale insects are recommended to be sprayed with bifenthrin + enpyrethrin or thiazide.