1. Rooting time
Growing vegetables to be less disease, prevention is important. Irrigation root is also the same, must not in the vegetable onset reirrigation, in general after the vegetable planting slow seedling stage will be used 800 times of jiamei bonus + oxilin irrigation root to prevent disease.
2. Matters needing attention
①Watering should not be done before root irrigation with fungicides. One is that plant root diseases have already occurred, if water, the bacteria will spread with the water, causing more dead plants. Second, irrigation can easily lead to soil permeability decline, root hypoxia, production of retting root, retrograde reduction, making pathogenic bacteria more susceptible to infection. In addition, irrigation of roots after watering can make it more difficult for the liquid to infiltrate into the soil. Excessive use of medicine can also make the soil more permeable, which can cause the retting of roots of crops and aggravate the occurrence of dead trees. Therefore, watering should not be carried out before irrigation of roots.
②Do not water immediately after root irrigation. After irrigation root immediately watering, will make the soil in the liquid quickly dilute, sterilization and disease prevention effect. Therefore, try not to water the roots for a few days after using the fungicide. If water is short of water, a small amount of water can be poured in the planting ditch, to the surface of the dam to a third of the appropriate.
③The fungicide should be mixed with jiamei bonus as much as possible, and the concentration of the liquid should not be higher than 1000 times, so as to prevent the excessive concentration of the liquid in the soil around the root system of vegetables.
④Make sure the liquid reaches the site. The diseases occurring at the base of the stem, such as phytophthora root rot and stem basal rot, can be sprayed by drug directly at the base of the stem and then irrigated. For main root and capillary root diseases, it is best to open the root and apply the medicine directly to the root with a root-irrigation device, so as to achieve better results.
⑤In the use of fungicides after root irrigation, if the symptoms of drug damage, water can be remedied to avoid large losses. The measure is to quickly remove small water to dilute the concentration of the soil solution, and then to spray or spray jiamejin point in time to help restore growth. Potion root irrigation and water irrigation are the same, the weather has certain requirements. Potting root must be selected for several consecutive days when sunny weather, to be more appropriate after 10 am.
