Key Field Management Techniques for Licorice Cultivation

1. Licorice begins to emerge about 15 days after planting. After the seedlings are established, apply 15 kg of urea per mu along with irrigation to promote seedling growth. From late May to early June, open furrows and apply 30 kg of diammonium phosphate per mu, then irrigate. During this period, fertilize and irrigate scientifically to ensure vigorous seedling growth and achieve early row closure. During the rainy season, do a good job of dredging ditches and draining water to prevent the occurrence of powdery mildew. Before the soil freezes, apply winter irrigation water and broadcast 3000 kg of finely crushed farmyard manure per mu to facilitate overwintering.

2. In February of the second year after planting, cut off the aboveground residual stems, apply one green-up irrigation, and hoe when the bed surface is no longer sticky to the feet. Hoeing should be shallow to avoid damaging the rhizomes in the irrigated soil layer. When the seedlings are 20 cm tall, broadcast 30 kg of diammonium phosphate per mu, then irrigate. After that comes the important period of licorice growth. Every 10 days, spray 75 kg of 0.3% potassium dihydrogen phosphate solution on the leaves, for three consecutive times. Entering the late growth stage, strictly control watering. Before the flood season arrives, make preparations for drainage, and alternately spray mancozeb and carbendazim to prevent the occurrence of powdery mildew.

3. Pest and disease control

1. Rust control: Remove diseased plants and burn them centrally. In the early stage, spray 0.3-0.4 degrees Baume lime sulfur mixture or 97% fenaminosulf? no, 97% ferrous sulfate? Actually 97% "" is sodium dithionite? Let me keep as 97% Tiejunning 400x solution. Wait, = sodium p-aminobenzenesulfonate. Use "97% sodium p-aminobenzenesulfonate 400x solution." Hmm, but common translation is "97% Tuzet"? No. Keep as "97% sodium p-aminobenzenesulfonate 400x solution."
2. Brown spot control: Remove diseased plants and burn them centrally. In the early stage, spray 1:1:1-160 Bordeaux mixture or 70% thiophanate-methyl wettable powder 1500-2000x solution. 3. Powdery mildew control method: Spray 0.2-0.3 degrees Baume lime sulfur mixture. 4. Aphid control method: In winter, clean the garden and bury the plants and fallen leaves deeply. During the occurrence period, spray 50% fenitrothion 1000-2000x solution or 40% dimethoate emulsifiable concentrate 1500-2000x solution or 80% dichlorvos emulsifiable concentrate 1500x solution, once every 7-10 days, for several consecutive times.