Jujube sprayed with Bordeaux mixture
Bordeaux fluid is a protective bactericide that inhibits spore germination or mycelial growth by releasing soluble copper ions. Under acidic conditions, when copper ions are released in large quantities, they can also solidify pathogenic cell protoplasm and act as a bactericidal agent. In the case of relatively high relative humidity and dew or water film on leaves, the efficacy is good, but plants with poor copper tolerance are prone to phytotoxicity. It has a long duration of validity and is widely used in the prevention and control of various diseases of fruit trees. It is particularly effective for leaf diseases such as downy mildew and anthracnose.
Bordeaux fluid is the most commonly used protective agent in orchards at present, and it occupies an extremely important position in the prevention and control of fruit and vegetable pests and diseases. Especially in rainy years, the leaves that do not spray Bordeaux mixture tend to fall off early, while those that spray 2 or 3 Bordeaux solutions generally do not fall off early. Bordeaux liquid sprayed on the tree after the whitish, there is a repellent effect on the peach, leaf leafworm, Tianni, etc., pests do not lay eggs on the tree, so as to achieve control purposes. Each agent is also a fertilizer. Bordeaux's solution also sterilizes calcium and copper in the fruit tree.
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