What to Do About Seedling Rot in Rice Planting? The Latest Control Methods
Seedling rot includes seed rot, bud rot and seedling rot. Rice faces many problems during the planting process, but seedling rot is the most serious. It mostly occurs in the low-temperature season of early spring. At this time, seedling rot leads to missing seedlings and delays the best transplanting period, making normal planting impossible. So what should be done about seedling rot when planting rice? Below, Qinnong Web brings you its control methods. Let's take a look.
1. Causes of rice seedling rot
Seedling rot is the general term for seed rot, bud rot and dead seedlings
Seed rot: Poor storage during seed storage leads to a low germination rate of the seeds. Another cause is not changing the water during seed soaking, or the soaking water not being clean, which causes the seeds to turn sour and smelly. Too high a temperature during sprouting can also cause seed rot.
Bud rot: Bud rot occurs when planting in low-lying, waterlogged areas. After the seeds are sown and germinate, the seed roots are inhibited and cannot grow downward, leading to bud rot. Another cause is attack by disease, which leads to bud rot.
Dead seedlings: Dead seedlings are caused by temperature changes. Low-temperature environments are often unfavorable for the growth of seedlings, making root absorption weak. When the temperature suddenly rises, transpiration speeds up, and the water absorbed cannot keep up, causing a water imbalance and eventually death by drying out.
2. Symptoms of rice seedling rot
The symptoms vary greatly depending on the cause of seedling rot. Seed rot mainly appears as the seeds turning black after sowing in rice, and beginning to smell and rot. Bud rot occurs when the seeds have already germinated after sowing, but the young buds die before turning green. With bud rot, the affected parts show a milky white gelatinous substance that gradually turns into a yellow hairy substance, causing the young buds to die. Dead seedlings occur when the weather suddenly clears after a cold wave, and the young seedlings show green wilt or yellow wilt. At first, the tender leaves begin to wither and curl, the stem begins to change color, and finally the plant withers and dies.
3. Control methods for rice seedling rot
Before soaking the seeds, dry the seeds thoroughly, select better seeds and soak them in water. The soaking must be thorough, and disinfection treatment should also be noted. Choose a plot that is sheltered from the wind and faces the sun, has convenient drainage and irrigation, loose soil and relatively high fertility for planting. Use chemicals to control the diseases that cause seedling rot. If the temperature is low, plastic film technology can be used to keep warm. When the temperature rises, remove the plastic film in time. During the planting period, observe at all times and deal with any adverse reactions promptly.
The above is what Qinnong Web brings you about what to do about seedling rot in rice planting. There are many causes of rice seedling rot, so careful observation is needed to suit the remedy to the case. For more related agricultural knowledge, please stay tuned to Qinnong Web.