How to prevent and control pests and diseases of Polygala tenuifolia? Latest technical method tutorial

Polygala tenuifolia, also known as xiaocao, gangye polygala, shancha leaves, etc. It is a commonly used traditional Chinese medicine, first recorded in the Shennong Bencao Jing, listed as a superior grade, and regarded as an important tonic for nourishing life. It has the functions of calming the mind and improving intelligence, dispersing stagnation and resolving phlegm. During its growth process, it is easily harmed by pests and diseases, so it needs to be prevented and controlled. Let us take a look at the pest and disease control techniques for Polygala tenuifolia!

Root rot

[Damage characteristics] In the early stage of root rot, the roots and rhizomes partially turn brown and rot, the base of the petiole develops brown, prismatic or elliptical rotten spots, and finally the base of the petiole rots completely, the leaves wither and die, and the rhizome rots.

[Control method] Remove and burn as soon as it is discovered, disinfect the diseased holes with 10% lime water. In the early stage of the disease, 50% carbendazim 1000 times solution can also be used for spray irrigation, once every 7-10 days, for 2-3 consecutive sprays.

Leaf blight

[Damage characteristics] The disease starts on the lower leaves of the plant and gradually spreads upward. In the early stage, small brown round spots appear on the leaf surface, then the lesions continue to expand, the center becomes grayish brown, and finally the leaves scorch and the plant dies.

[Control method] Spray the leaves with mancozeb 800-1000 times solution or ridomil 800 times solution, generally once every 7 days, and two sprays can control the damage.

Aphids

[Damage characteristics] They harm the young leaves of the plant from late May to early June.

[Control method] Spray-kill with 40% dimethoate emulsion 2000 times solution, once a week, and 2 sprays can control the damage.

Bean blister beetle

[Damage characteristics] It occurs from June to August and harms leaves and young stems.

[Control method] Spray-kill with 5-10 mg/L decis, 2 consecutive sprays, 5-7 days apart, can kill them all.