Best Time to Apply Chlormequat to Soybeans and Root Rot Treatment Methods

As people's economic living standards continue to rise, their requirements for food choices are also getting higher and higher. Many people choose purely natural, pollution-free healthy foods when selecting food. Therefore, the prospects for the planting industry are also very good. Today, let's talk about a crop that is very popular with everyone: soybeans. So when should chlormequat be applied to soybeans? What pesticide should be used for soybean root rot? Next, the editor will answer these questions for you.

When to Apply Chlormequat to Soybeans

1. Whether to spray chlormequat on soybeans depends on the weather and the growth condition of the soybeans; it is not always necessary. It is generally because the planting is too dense or there are too many rainy days, causing the stems and branches at the seedling stage to be thin and elongated. Chlormequat is generally sprayed more than ten days before the flowering stage.

2. Chlormequat can be used on soybeans. It can make soybeans short and sturdy, with well-developed roots, thicker leaves, deeper leaf color, and enhanced photosynthesis, thereby promoting reproductive growth, increasing the pod-setting rate, improving quality, increasing yield, and improving drought resistance, cold resistance, and saline-alkali resistance. 3. Generally, when soybeans have 4 compound leaves, spray 0.1% chlormequat solution per mu, and at the early flowering stage, spray once more with 0.5% chlormequat solution, spraying 50 kg of solution per mu each time.

What Pesticide to Use for Soybean Root Rot

1. Seed treatment with 50% Anke wettable powder and 25% metalaxyl wettable powder at 0.2% of seed weight. After disease occurs in the field, spray 50% Anke wettable powder at 1500 times dilution or 25% metalaxyl wettable powder at 600 times dilution for control, spraying once every 7 days for 3 consecutive sprays.

2. Root rot mainly harms fruit trees, vegetables, flowers, crops, etc., and is mainly caused by bacteria such as Pythium, Phytophthora, Rhizoctonia, Thielaviopsis, and bacterial Erwinia species. The pathogen overwinters in the soil and in diseased plant residues. It generally occurs from late March to early April, and enters its peak period in May. In recent years, its degree of damage has continued to increase, control is difficult, and the recurrence rate is high, directly affecting farmers' economic returns. The main symptoms of root rot are: scorched leaf edges, new shoots stopping growth, leaf wilting, and leaves drying green, etc. It is prone to occur under high temperature and high humidity conditions in summer. Therefore, control work must be done well.

How to Prevent and Control Soybean Root Rot

1. Strengthen quarantine and use disease-free seeds.

2. Select disease-resistant varieties with resistance to local races.

3. Strengthen field management, carry out timely deep plowing and intertillage hilling; drain accumulated water promptly after rain to prevent moisture retention.

4. Because this fungus only infects soybeans, rotation in affected plots should be no less than 4 years.

Soil Conditions for High-Yield Soybeans

1. Soil conditions are the foundation for high-yield soybeans. Soil moisture status, nutrient status, and some physical properties of the soil are important factors affecting soybean yield.

2. Soybean seed germination requires more water than cereal crops. Soybean young roots are relatively tender and have high water content. Suitable soil moisture conditions are needed to promote young roots to extend deeper. The main root of the plant can reach about 1 m, and lateral roots can extend parallel to about 0.5 m. 3. When soil moisture is insufficient, it will affect their vertical and horizontal expansion growth.

4. Soybean roots are very sensitive to oxygen changes in the soil. Under oxygen-deficient conditions, root growth is significantly reduced. Therefore, moderate soil moisture content, deep plow layer, and moderate looseness and tightness can provide good moisture content and aeration conditions, which will promote the growth and development of the root system.

5. In soil science, soil compactness is used as a physical property indicator of moisture and aeration in the soil tillage layer, generally expressed as bulk density (grams of dry soil per cubic cm). The suitable soil bulk density for soybeans is 1.0-1.4. Loam soil is most suitable for soybean growth, and clay loam, clay soil, and sandy loam can also grow normally; sandy soil and clay soil, with weak water-holding capacity or poor aeration, are not conducive to growth.

From the above, we can know that chlormequat can be used on soybeans, which can make soybeans short and very sturdy, with well-developed roots, thicker leaves, and deeper leaf color. Therefore, chlormequat has many effects on soybeans.