How to do the cactus long spot?

The cactus ball plant is a succulent pet that everyone likes very much. although it is covered with thorns, it can not stop people from loving it, and it is also the best succulent plant to raise, but cactus spots are often found in the process of breeding. many people do not know what to do with cactus spots, let's take a look!

The cause of the long spot of the cactus

The cause of cactus long spot is generally cactus rust (cactus yellow spot), mainly due to improper cultivation and management, such as too barren basin soil, insufficient nutrients, or excessive use of nitrogen, resulting in tender and soft plant tissue, or basin soil is too sticky, drainage is not smooth, moisture is too large, or seedling basin is shaded for a long time, poor ventilation, or rust infection caused by environmental factors such as sudden cold and heat in winter and spring. In addition, water droplets on the ball when watering, will also cause bacterial breeding, the formation of spots, too much sun will also cause burn spots.

What about the cactus with long spots?

1. If it is caused by rust, the plant can be removed, the soil is disinfected with potassium permanganate (or steamed in a pot or heated in a microwave oven), and the sphere is disinfected with carbendazim, chlorothalonil or methyl thiophanate diluted solution.

2. at ordinary times, we should pay attention to control watering, do not water too much, maintain a well-ventilated environment, and do not expose yourself to the sun. When the plant changes the pot, the weeds should be removed, the bacteria-carrying soil should be shaken off, and the newly prepared culture soil should be put back on the basin. Those who have the conditions can add a lot of carbendazim or methyl thiophanate powder to the culture soil to sterilize. In the daily cultivation and management, a certain proportion of phosphorus and potassium fertilizer was applied to improve the plant disease resistance.

3. In the early stage of rust, 75% chlorothalonil wettable powder or 20% triadimefon EC 2500-4000 times can be sprayed to prevent and kill rust, and 80% Dysen zinc wettable powder 600 times 800 times, or 12.5% Suopoli wettable powder 6000 times, once every 7 to 10 days, the preventive effect is obvious.

Culture method of cactus

1. Configuration of cultivated soil: cactus is a desert plant, which is more suitable for acidic and weakly acidic soil environment. Because the root system of cactus is underdeveloped, the soil must be rich in organic matter and loose and breathable. General culture soil is to use humus soil exposed to the sun for 2-3 days to add phosphorus and potassium fertilizer, generally every 50 kg basin mixed with 1 kg of calcium superphosphate, 0.5 kg of potassium phosphate as base fertilizer.

2. Rational water management: the principle of watering is "dry rather than wet". Watering can not water the heart of cactus. Generally, it is always watered every half a month in spring and once a week in summer, but the growth slows down in autumn and winter. Watering more than 20 days is OK. It should be noted that it is best for Rain Water to water flowers. If it is tap water, it is best to be exposed to the sun for two days.

3. Reasonable fertilization management: Taolai water can be put in a closed container for half a month, and then poured. This kind of rice washing water is rich in nutrients and weakly acidic, so it is very suitable for watering cactus. Topdressing should be carried out when necessary, usually every spring and summer, combined with watering with 1% potassium dihydrogen phosphate, 2 to 3 times a year.

4. Control the placement of light: cactus is a plant that likes sunlight very much, but if the temperature exceeds 36 degrees Celsius, it should also be shaded. Cactus is not suitable for long-term display in the indoor environment, so it is easy to cause the cactus to turn black, usually every month or so, put it in the outdoor sunshine for 2 to 3 days, and then move back indoors, pay attention to the sunny place indoors.

5. Change the basin and change the soil in time: generally, if the cactus grows in the basin for 2 to 3 years, the nutrients of the soil will be confirmed, and it will also cause the consolidation of the cultivated soil, so it is time to change the basin. Carefully remove the cactus from the original flowerpot, put some fragments at the bottom of the new flowerpot to facilitate drainage, and then fill in the culture soil configured in the first step until 1max 3. With hand compaction, gently put the dug cactus (to cut off the rotten roots and diseased roots), fill in the culture soil around, gently lift the cactus, to facilitate the extension of the root system, and finally fill in the remaining culture soil and compaction.

6. prevention of diseases and insect pests: the diseases and insect pests of cactus are mainly anthracnose, canker, shell insects and whitefly, mainly to control moisture, timely ventilation and prevention. Carbendazim has a certain effect on anthrax, streptomycin is more effective for canker, but mainly prevention.