What to Do About Herbicide Damage in Soybeans? Read This to Understand the Remedial Methods

Soybean is a common crop in our country, grown in many regions, but mainly in the north, and every year a certain amount of subsidy can be obtained. During soybean cultivation, various types of herbicide damage can occur, so what should be done about herbicide damage in soybeans?

1. What to do about herbicide damage in soybeans?

1. Increase fertilizer application. When plants show symptoms such as yellowing and herbicide damage, apply an additional 3.3 kg of urea per mu to increase nutrients, strengthen cultivation to enhance soybean growth vigor, and promote early development.

2. Spray plant growth regulators. Spray 2 g of Yunda 120 agent + 13 mL of concentrated yield-increasing bacteria liquid per mu, or agents such as rooting powder. The commonly used naphthylamine on the market also has a certain effect on alleviating herbicide damage.

3. Take measures to promote early maturity and increase yield. By spraying foliar fertilizer, strengthening field management in the middle and late stages, and other measures, promote the affected plants to recover growth early and mature normally. Spray 170 g of potassium dihydrogen phosphate + 100 g of Tailongbao foliar fertilizer (biological bacterial agent) + 500 g of urea per mu. In addition, appropriate micro-fertilizers can be used, such as 150 g of ammonium molybdate, 100 g of borax, and 200 g of zinc sulfate per mu as foliar fertilizer.

4. For the agent that caused the herbicide damage, spray gibberellin or scatter plant ash, activated carbon, etc. to alleviate it; for damage from photosynthesis inhibitors and certain contact herbicides, apply quick-acting fertilizer to promote soybean recovery growth; for damage from soil treatment agents, reduce residues as much as possible through plowing and other treatments.

2. Why do soybeans suffer herbicide damage?

1. If inappropriate types of pesticides such as insecticides, fungicides, herbicides, and plant growth stimulants are selected for soybeans, or the application concentration is too high, the spraying time is wrong, pesticides are used during the flowering period, or herbicides to which soybeans are sensitive are used, herbicide damage can occur.

2. During the entire growth and development process, soybeans suffer relatively many diseases and insect pests. Pesticides are used frequently in production, so herbicide damage is unavoidable. Any adverse consequence of a pesticide on crop growth and development is called herbicide damage.

3. For example, improper application of dichlorvos, dimethoate, nitrofen, etc. can easily cause contact-type herbicide damage. For example, with dichlorvos damage, the leaf mesophyll first turns purple, then bright red or light yellow, while the veins remain green, and later the veins also turn yellow; with Bordeaux mixture damage, scorched spots of varying sizes, hardening, and early falling occur on the leaves, and the plant shrinks; with lime sulfur mixture damage, scorched patches appear on the leaves and pod shells, and the leaves dry up and fall off easily. Application of herbicides such as 2,4-D, MCPA, and 2,4,5-T often causes systemic-type herbicide damage, also called chronic herbicide damage. Only after a relatively long time of use do symptoms such as plant dwarfing, deformity, thickened mesophyll, dark green leaf color, and leaf wrinkling appear. In severe cases, lateral branches cluster and growing points necrose. After soybeans suffer 2,4-D damage, the leaves appear chicken-claw-shaped, and the leaves become smaller and narrower.

4. Herbicide damage caused by excessive trifluralin leads to tumor formation on the main root of soybeans, etc. Excessive concentration of chlormequat can also produce similar symptoms. Pesticide use during the flowering period often affects pollination, causing ovary infertility or flower drop.