When is the most suitable time to plant Astragalus membranaceus?

Astragalus membranaceus, also written as Huangqi, has roots that can be used as medicine, with a long history of medicinal use. Ancient herbal books such as "Mingyi Bielu" and "Compendium of Materia Medica" all consider it to have the effect of tonifying qi and replenishing deficiency. So when is the planting time of Astragalus membranaceus generally? Friends who are not familiar with it might as well take a look together.

I. Planting Time of Astragalus membranaceus

Astragalus membranaceus is divided into spring sowing and autumn sowing, generally mostly using spring sowing, with the time from late April to early May, emergence in early May, and about 1 month for full emergence.

II. Pest and Disease Control of Astragalus membranaceus

Diseases

1. Powdery mildew: Powdery mildew of Astragalus membranaceus generally occurs after July during the flower bud and pod-setting stage, mainly damaging leaves and pods, and mostly occurs under high temperature and high humidity conditions.

Symptoms: White powdery spots initially appear on both sides of the diseased leaves and on the surface of the pods, and in severe cases the leaves are covered by white powder. Affected plants shed leaves early, seriously affecting growth.

Control method: At the early stage of the disease, spray 2-3 times with 25% triadimefon 1500-fold solution or 1:1:120 Bordeaux mixture; you can also use 50% amobam aqueous solution 1000-fold solution or 50% thiophanate-methyl wettable powder 1000-fold solution for spray control.

2. Fusarium wilt: Fusarium wilt of Astragalus membranaceus is a root disease caused by fungi. It begins to occur in June, and is severe from July to September. High temperature and rainy conditions, high groundwater levels, and heavy clay soil make it prone to occur.

Symptoms: The fibrous roots turn brown and rot, the main root develops reddish-brown or scorched-brown rotten spots, and the leaves of the diseased plants turn yellow and fall off. The aboveground parts wither and the roots completely rot.

Control method: Do not plant on acidic soil, do not cultivate in low-lying land, and do not practice continuous cropping. You can use 5% lime water or 50% carbendazim wettable powder 1000-fold solution to drench the diseased holes.

Insect pests

1. Small weevil: The adults and larvae of the small weevil of Astragalus membranaceus damage the seedlings and young roots of Huangqi, and in severe cases eat all the aboveground parts, causing missing plants and broken rows.

Control method: After emergence, spray with trichlorfon 2000-fold solution every 10 days to kill the adults.

2. Pod borer: The larvae of the pod borer of Astragalus membranaceus bore into the pods to feed on the seeds, and when the damage is severe, the seeds lose their germination ability.

Control method: During the adult hatching period, use light traps to kill the larvae, or during the flowering period use dichlorvos or deltamethrin according to the dosage and spray once every 7 days, continuously spraying 3-4 times, until the seeds mature.

The above is the related content on the planting time of Astragalus membranaceus compiled by Tuliu.com. We hope it is helpful to you.