Methods and precautions of root irrigation with chemicals for vegetables in winter

After entering winter, the temperature in the greenhouse is low and the humidity is high, which can easily lead to diseases. To control root diseases, choosing chemical root irrigation is one of the most effective measures, but attention must be paid to skills when root irrigation is carried out, otherwise it may be counterproductive. Let's take a look at it with the editor.

1. The method of root irrigation of vegetables in winter

1. Soil biology should be taken into account.

Choosing medicament to irrigate the root can not destroy the biological population and ecological balance in the soil, such as the greenhouse where bacterial fertilizer has been applied, try not to use fungicide to irrigate the root, so as not to kill the beneficial microorganisms in the bacterial fertilizer and make the bacterial fertilizer lose its fertilizer effect. If the vegetable has become ill and must be treated with chemical irrigation, it is not necessary to consider whether the beneficial microorganisms are damaged or not, so as to avoid losing the big because of the small.

2. It is not suitable for irrigation before root irrigation.

Most of the root diseases will spread with water, resulting in a large area of plant disease, in addition, watering will also lead to the decline of soil permeability, resulting in lack of oxygen in vegetable roots, retting roots, reducing disease resistance, accelerating pathogen infection and causing dead plants.

3. It is not suitable to water immediately after root irrigation.

If the root is watered immediately, the solution will be diluted quickly, thus reducing the germicidal effect. if there is a lack of water and drought, you can pour small water in the ditch, the water surface to the ridge height of 1/3, do not spread over the ridge surface.

II. Points for attention

1. The choice of medicine should be reasonable.

In the selection of chemicals, we should choose those with strong pertinence and good control effect, and should not use drugs blindly so as not to delay the prevention and control period.

2. the concentration should be appropriate.

When using chemicals, we must pay attention to the concentration, especially in the mixed application of fungicides and humic acid liquid fertilizers or hormones that stimulate root development, the concentration of the solution must not be higher than 800 times, so as not to cause drug damage due to excessive concentration.

3. Pay attention to watering before and after root irrigation

It is not suitable to sprinkle water before and after root irrigation, mainly because root diseases have already occurred. At this time, sprinkling water will make germs spread areally with the water, causing more vegetables to get sick.

4. It is not suitable to apply bacterial fertilizer before and after root irrigation.

Fungicides will more or less affect the microorganisms in bacterial fertilizer, so try not to apply bacterial fertilizer before and after root irrigation. In the land where bacterial fertilizer has been applied, fungicides are used as little as possible in the prevention and control of diseases, so as not to make bacterial fertilizer lose its due effect.

5. Timely remedy of drug damage

If yellowing occurs after root irrigation, the obvious symptoms of drug injury need to be remedied in time so as not to cause greater losses. Can immediately irrigate a lack of water, dilute the concentration of the solution, at the same time can spray relief agents to promote the root system to recover as soon as possible.

The above is the introduction of vegetable chemical root filling methods and matters needing attention in winter. I hope it can help you. If you want to know more about it, please follow us.