What causes gelatinous crystals on jasmine pages? How to prevent it?

It's white silk disease, and it mostly happens at the base of the stem. The susceptible plants turn brown and rot, and the cortex of the diseased part is easy to peel off, and white silky hyphae are produced on the surface. In the later stage, the diseased part grows rapeseed-like sclerotia.

Pathogens overwinter in soil or on diseased remnants with sclerotia or mycelium. When there is a lot of rain in May to June and August to September every year, it is easy to repeat the infestation. The method of prevention and control is :

1) Remove the remains of diseased plants in time and destroy them in a centralized manner. (2) Strengthen management, strict quarantine, and eliminate the source of disease. (3) At the beginning of the disease, disinfect the surrounding soil with 70 pentachloronitrobenzene soil, or spray 1 Bordeaux liquid or Baumé stone sulfur mixture, or 50 wettable antibacterial special soil for prevention and control.

When the disease is severe, spray 800 to 100 0 times of chlorothalonil wettable powder of 75 or 800 times of zinc wettable powder of 65 days. In this case, it can generally be prevented.

The red spider is infested, the leaves are yellow, and there are small red spots on the front and back of the leaves.

My jasmine tricked the American white moth, and the leaves were also sticky, as if they were coated with a layer of oil, is it the secretion of the white moth?

I've been raising jasmine for a few years, and I haven't seen this phenomenon? Move outside and sprinkle some water in the sun, hold on for a few days, and see how it goes?

This phenomenon occurs in jasmine leaves, as you said, because the concentration of foliar ferrous sulfate is too high, and you should spray off the ferrous sulfate crystals on the foliar surface with clean water, or remove these leaves. Ferrous sulfate is an inorganic chemical trace element, which is not a commonly used fertilizer and cannot be applied frequently, if used excessively, it will lead to yellow leaves and death of plants. Generally, when the plant is seriously deficient in iron, foliar application of ferrous sulfate can promote the synthesis of chlorophyll in flowers and trees, and the concentration of spraying is , .

At the same time, it can also neutralize the alkalinity in the soil. In fact, there is no need to fertilize in winter, some yellow leaves are normal, and organic fertilizer should be applied to them. Winter is mainly based on heat preservation, because jasmine is afraid of cold, more frost-resistant, when the temperature is lower than 3, the branches and leaves are prone to frost damage, such as a long duration will die.

It is better to have a moist and slightly dry soil.

Drink plenty of water, often do some jumping exercises, such as skipping rope, and drinking too little water will also increase the factor of stones.

It's not a crystal.

That's just secreted.

It's just one thing.

Nothing else.