1. To control downy mildew on cucumber, melon, watermelon and other crops, before downy mildew occurs, brown sugar (100g)+ potassium dihydrogen phosphate (50g) and 30kg water can be evenly sprayed on the leaves of the whole plant, which can effectively control downy mildew.

2. The virus diseases of tomatoes, peppers and other crops can be controlled before the crops blossom and bear fruit. Spraying brown sugar (100 ~150g)+urea (50 ~ 80g) and 30kg of water evenly on the leaves of the whole plant can prevent the occurrence of virus diseases.

3. When rape, cotton, peanut and other crops are used in flowering and fruit-setting period, brown sugar (100g)+boric acid (20-30g) and 30kg of water are used per mu. After completely melting, the whole plant can be sprayed evenly, which can improve the fruit setting rate and prevent the phenomenon of falling flowers and fruits.

4. After wheat, corn, peanuts, soybeans and other crops suffer from phytotoxicity, add 0.0 1.0% soluble brassinolide powder (1.5g) per mu, add 30kg of water, and spray the whole plant evenly, once every 7 days, 2-3 times.

5. Wheat, rice and other crops should be sprayed with brown sugar (150g)+potassium dihydrogen phosphate (80g) and water (30kg) at the grain filling stage once every 7 days for 2-3 times, so as to prevent premature plant aging, plump seeds, increase 1000-grain weight, significantly increase yield, and generally increase yield1.

Advantages of foliar fertilizer

1, fast absorption

After soil fertilization, various nutrients are first absorbed by the soil, and some fertilizers go through a transformation process in the soil, and then are absorbed by crop roots through ion exchange or diffusion, and then reach the leaves through the vascular bundles of roots and stems. Nutrient transport is long and slow. Through foliar fertilization, various nutrients can be quickly absorbed by crop leaves, directly enter plants from the leaves and participate in crop metabolism. So its speed and effect are faster than soil fertilization.

2, the role is strong

The advantage of foliar fertilizer is fast absorption, because nutrients directly enter from leaf products, which can greatly increase the nutrient elements in crops in a short time, quickly alleviate the fertilizer shortage of crops and give full play to the maximum benefit of fertilizer. Foliage fertilizer can effectively promote the progress of various physiological processes of crops, significantly improve the intensity of photosynthesis, improve the activity of enzymes, promote the synthesis, transformation and transportation of organic matter, be conducive to the accumulation of dry matter, and improve the yield and quality.

3, the dosage is saved.

Foliar fertilization is generally less, especially trace element fertilizers such as boron, manganese, molybdenum and iron, and root fertilization usually needs a lot to meet the needs of crops. However, foliar fertilizer is sprayed on crop leaves, which is generally one-tenth or one-tenth of soil fertilization, and satisfactory results can be achieved.

4. High efficiency

Foliage fertilizer has the advantages of fast fertilizer efficiency, high utilization rate, remarkable effect, simplicity and so on, and is increasingly welcomed by farmers.

Refer to Baidu Encyclopedia-Foliage Fertilizer for the above contents.