Root rot is a disease caused by fungi, which causes root rot, and the function of absorbing water and nutrients is gradually weakened. Finally, the whole plant dies, mainly because the whole plant leaves are yellow and withered. The onset time is usually from late March to early April, and May enters the peak period.
How to prevent root rot?
1. Selected varieties: select and improve the nursery plots. Choose high-quality varieties, and soak the seeds with seed coating agent and plant them at the appropriate time.
2, seed, cuttings disinfection: before sowing, the seed can be used 0.3% of the weight of the seed or the seed weight of 0.1% of the powder rust, or 80% of the 402 antibacterial emulsifiable 2000 times solution soaked for 5 hours; the cutting base can also be used The same concentration of the drug solution was immersed for 1 hour and then inserted.
3, seedbed soil disinfection, the use of nail cream, carbendazim, carbendazim and other soil disinfection, and can cure both rickets and blight.
4. Field management:
1 Intensive cultivation of fine land, careful cultivation of strong seedlings, try not to damage the roots during transplantation, carefully sorted, ensure that no water is accumulated, and the base fertilizer is applied.
2 After planting, according to the temperature change, watering should be timely and appropriate to prevent evaporation of water on the ground, transpiration of seedlings, and isolation of viral infection.
3 Spraying phosphate fertilizer in the flower bud stage, young fruit stage and fruit expansion stage respectively, enhancing the nutrient matching function of the plant, making the fruit stalk thicker, promoting the healthy growth of the plant and enhancing the disease resistance.
5, chemical control. It can be controlled by copper preparation or metformin. When it occurs, it can be rooted with metformin or copper preparation.
6. Timely prevention and control of underground pests and nematodes.
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