Which pesticides work well for controlling soybean root rot?

Soybean, also known as shu and yellow bean, is one of China's important food crops, cultivated in all regions and widely grown around the world.So which pesticides are used for soybean root rot? What are the symptoms?

1. Which pesticides are used for soybean root rot?

For soybean root rot, spray with 50% Anke wettable powder at 1500 times dilution or 25% metalaxyl wettable powder at 600 times dilution; it can also be applied as a soil drench with 10% Shuangxiaoling aqueous solution at 300 times dilution, 70% hymexazol wettable powder at 1000-2000 times dilution, 50% carbendazim wettable powder at 800-1000 times dilution, or 20% Longkejun suspension concentrate at 500-600 times dilution.

2. What are the symptoms of soybean root rot?

Soybean root rot mainly occurs on the roots of soybean, and both seedlings and mature plants can be infected. However, the symptoms differ slightly at different stages: in the early stage, small irregular light reddish-brown spots appear on the epidermis of the stem base or radicle, later becoming reddish-brown sunken necrotic spots that spread around the root stem and cause the root bark to die; affected plants have poorly developed root systems, few root nodules, short and weak aboveground growth, pale green leaves, and markedly fewer branches and pods.

3. How is soybean root rot prevented?

1. Persist in carrying out crop rotation with grass-family crops for more than three years, and strictly prohibit continuous soybean cropping or soybeans following soybeans; choose ridge tillage, as this helps the soil lose moisture and warm up, thereby reducing the disease; choose timely late sowing, starting sowing when the ground temperature steadily passes 8°C-9°C, and require the depth not to exceed 5 cm; apply sufficient base fertilizer and seed fertilizer and topdress in time, and use multi-element compound liquid fertilizer for foliar feeding, which can make up for the insufficient uptake of fertilizer and water caused by root disease; carry out intertillage and hilling in time to promote the formation and recovery of new lateral roots at the base of the aboveground stem.

2. After rain, drain standing water from the field in time to reduce soil moisture. Plow in time, and the land should be finely tilled and leveled to improve soil aeration. Apply more organic fertilizer, cultivate strong seedlings, enhance disease resistance, and control underground pests. When spring temperatures are low, plots with heavy clay soil are areas where root rot frequently occurs, so the level of cultivation should be further raised, which is also an important disease-prevention measure.

Therefore, taking good preventive measures is still very necessary to prevent the occurrence of soybean root rot, and growers should pay attention.