How should rice seedling damping-off be prevented and controlled?
How do you prevent and control rice damping-off in seedlings? What effective control methods are there? Please give an introduction. Rice damping-off is the number one disease of rice seedlings. Generally, rice damping-off can be divided into two types based on its cause: first, fungal damping-off; second, physiological damping-off, also known as bacterial wilt. The following focuses on damping-off...
How do you prevent and control rice damping-off in seedlings? What effective control methods are there? Please give an introduction.Rice damping-off is the number one disease of rice seedlings. Generally, rice damping-off can be divided into two types based on its cause: first, fungal damping-off; second, physiological damping-off, also known as bacterial wilt. The following introduces the prevention and control methods for damping-off (for everyone's reference).
Prevention method one:
Strictly carry out seed coating and seedbed soil disinfection, and reduce the sowing rate. Before sowing, treat the seeds properly: first sun the seeds for 1-2 days, soak them in clean water for 12-24 hours, remove them, rinse with clean water, then air-dry until no water drips. Mix 0.35 kg (1 packet) of Hanyu Baomu with 1-1.2 kg of seeds, mix the seeds evenly, and then sow.
For seedbed soil disinfection, various multifunctional seedling-strengthening nutrients can be used, or 50 g of 25% Dexon can be mixed with 30 kg of water and poured over 20 sq m of seedbed surface.
Prevention method two:
Adopt low-tunnel seedling raising. The seedbed should have high ridges and low beds, apply sufficient base fertilizer, and increase phosphorus and potassium fertilizer to improve the disease resistance of the seedlings, reduce the moisture in the seedbed soil, and raise the temperature of the seedbed soil.
Control method one:
At the 1.5-leaf stage of rice, carry out chemical control. Choose 25 g of 50% "Likujing" or 30 g of 38% "Ekuling", mix with 30 kg of water, and pour over 20 sq m of seedbed. This has a good preventive and therapeutic effect on fungal damping-off of rice.
Once the disease occurs, in the early stage of onset, spray with a 1000-fold solution of 70% Dexon or splash with a 1500-fold solution. The control effect reaches more than 95%, and the seedlings resume growth after 5 days.
Control method one:
In the early stage of onset, spray the leaves with a "rooting powder" solution to promote rapid rooting and abundant rooting in rice, and prevent the occurrence and spread of damping-off.
Click to get more rice cultivation techniques
Click to get more food crop cultivation techniques