The planting method of zinnia

The cultivation of zinnia can be carried out by seed propagation or cutting propagation. Seed reproduction needs to strictly disinfect the soil and seeds, sow seeds during April-June, keep the amount of water after sowing, and do not have too much water to rot roots. Cutting seedlings can choose 10 cm side buds for cutting, generally 5-7 days to take root.

Control of diseases and insect pests of zinnia

1. White star disease

The disease occurs on the leaves. It can strengthen the management and application of fertilizer, cultivate strong seedlings, prevent rain and shade, timely watering after planting, and prevent flood irrigation. Strengthen the ventilation of the shed and reduce the humidity. Remove the disabled body in time. In the early stage of the disease, remove the diseased leaves in time, and then spray immediately for prevention and treatment.

2. Black spot

The black spot of hundred-day grass is also known as brown spot. You can choose a well-arranged area to plant. Planting density should be appropriate. Avoid continuous cropping. The seeds should be disinfected before sowing (inoculated with 1000 times of carbendazim wettable powder for 10 minutes). After autumn, diseased leaves and stems were destroyed to eliminate the source of infection in the coming year. Leave seeds from healthy mother plants that are disease-free. Spray with 5000 times of mancozeb or mancozeb. When spraying, you should pay special attention to spraying evenly on the back surface of the leaves.

Generally speaking, the cultivation of zinnia is relatively simple, there is no need to worry about diseases and insect pests, just use the medicine in time.