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The method of using agricultural cupric sulfate in vegetable production
Agricultural use:
1. copper sulfate solution has a strong bactericidal effect, mainly used to control diseases such as fruit trees, rice and potatoes.
2. cupric sulfate can be used to kill fungi and mix with lime water to produce Bordeaux, which is used as a fungicide to control fungi on lemon, grape and other crops to prevent fruit from rotting.
3. diluent can be used for sterilization in aquarium. Because copper ion is toxic to fish, dosage must be strictly controlled. Most fungi can be killed only with very low concentrations of copper sulfate, and Escherichia coli can also be controlled.
4. copper sulfate is also a trace element fertilizer, which can improve the stability of chlorophyll and prevent chlorophyll from premature damage and promote crop absorption.
5. can also be used to remove algae from rice fields and ponds.
Lack of copper in crops:
The new leaves were green and yellowish, white and curly, and necrotic spots appeared between the veins. The plants were dwarf and the lateral buds increased. The grass plants often form empty spikes, and the flowering and Fruiting of fruit trees are often seriously affected.

1. Methods of use
1.1 a mu of copper sulfate 1.5-2 kg per mu and 8-10 kg of ammonium bicarbonate per mu with ammonium bicarbonate per mu with 8-10 kg of ammonium bicarbonate and 12-20 hours after mixing, that is, for 12-20 hours, that is, ammonium copper preparation, and can also be used alone. Before planting, it is evenly spread into the planting grooves or planting points, and then plant seedlings are then planted. Once, for 3-5 years.
1.2 after the seedlings were planted slowly, the prepared cupric ammonium preparation was dissolved in water, washed into the vegetable field with water, or directly poured into the vegetable field with 2-3 kg of copper sulfate per mu, or irrigated vegetable crops with 500 times the copper sulfate solution, and each plant used 250 ml of liquid to prevent and cure the dead seedlings caused by soil borne diseases.
1.3 in the middle period of vegetable growth, sporadic strains were found in the center of the disease. Root canal was added to the center of the disease with 500 kg of copper sulphate per kilogram of water or 100 times of copper sulfate solution.

2. Precautions
2.1 When using copper sulfate to prevent and control vegetable diseases, we should pay attention to the mixed use of pesticides or foliar fertilizers containing metal ions such as zine and zinc.
2.2, it can not be mixed with carbendazim, methyl benzimidazole and other benzimidazole fungicides, in order to prevent interaction, reduce or lose the bactericidal potency.
2.3 when using copper sulfate, peach, plum, plum, apricot, persimmon, Chinese cabbage, kidney bean, lettuce and water chestnut are sensitive to this product and should not be used. Apple and pear trees are sensitive to copper ions at flowering stage and young fruit stage.
2.4, the time and dosage of medication should be strictly controlled according to the ratio of concentration.
2.5, it can immediately irrigate and relieve symptoms. In severe cases, 0.006% brassinolide aqueous solution 800-1000 times or 1.8% sodium nitrate water solution 5000-6000 times.

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