Control of Diseases and insect pests of Salvia miltiorrhiza

Sclerotinia sclerotiorum

It's a fungal disease. The pathogen first invaded the base of the stem, the head of the bud and the rhizome, making these parts gradually rot and turn brown. Grayish-black mouse fecal sclerotia and white mycelia often occurred on the surface of the diseased part, near the soil surface and inside the base of the stem. At the same time, the upper stem and leaves of the diseased plant gradually yellowed, and finally the plant died.

Prevention and control methods: the land with Sclerotinia sclerotiorum disease does not collect seedlings; rotation is carried out in the land where the disease has occurred, and it is not suitable for continuous cropping, but can be rotated with rice; chemical control, 50% chloronitramine wettable powder 0.5kg plus lime 7.5~10kg is used in the initial sporadic disease and scattered on the stem base of the diseased plant and the surrounding soil. However, the roots can not be dug up until more than 10 days after application to ensure medicinal safety.

Salvia miltiorrhiza leaf spot

It is a bacterial disease that harms leaves. There are nearly round or irregular dark brown spots on the leaves of the diseased plants. in severe cases, the disease spots expand and converge, resulting in the death of the leaves. The disease usually begins in May and lasts until the end of autumn.

Prevention and treatment methods: clean up the countryside, bury the diseased and residual plants deeply, pay attention to drainage, and improve the ventilation and light transmission conditions.

Root rot of Salvia miltiorrhiza

The disease can occur throughout the growth period. The roots of the diseased plants rotted and the aboveground parts gradually withered.

Prevention and control methods: select high dry land planting, pay attention to drainage and waterlogging, do not make the field stagnant water; not continuous cropping; select disease-free seed planting; at the initial stage of the disease, irrigate the roots with 50% topiramate 500 times 800 times solution.