What persimmon trees are most afraid of? what medicine persimmon trees are most afraid of?

Many families will plant some persimmon trees, after all, the nutritional value of persimmon is also relatively high. Persimmons are actually very rich in pectin, vitamin c, and carotene, and people like constipation or high blood pressure are very suitable for eating persimmons. So what are the persimmon trees that people are most afraid of? What kind of pesticide is better for persimmon trees?

What do persimmon trees fear most?

The main results are as follows: 1. The older persimmon is most afraid of transplanting, and the root system will be greatly damaged. Due to the oxidation caused by the tannin cells in the wound after root cutting, the impervious isolation layer is formed. If the persimmon roots forming the isolation layer are not watered immediately after transplanting, there is a relief space for the persimmon roots that form the isolation layer. It is easier to absorb water better.

2. Persimmon trees are most afraid of waterlogging. The newly transplanted older persimmon trees have weak root water absorption function and small demand for water, so keep the soil moist properly. Immediate or continuous irrigation will affect soil air permeability and inhibit root respiration, which is disadvantageous to rooting and, in serious cases, will lead to rotten root death.

What kind of medicine does persimmon tree take?

1. Persimmon corner spot: from June to July, the pathogen was transmitted by Rain Water. August is the peak of the disease. 1 (cupric sulfate) ∶ 2: 5 (lime) ∶ 600 times Bordeaux solution should be sprayed in the middle of June.

2. Persimmon round spot: the ascospores formed by the hyphae of the disease matured in the middle of June and spread by wind and rain. The disease began to occur from August to September and was sprayed with 1 (cupric sulfate) ∶ 2n5 (lime) ∶ 600x Bordeaux solution in the middle of June to prevent infection. Round spot, angular spot, anthracnose and powdery mildew can also be controlled by Baume 0.3: 0.5 degree stone sulfur mixture or 50% methyl topiramate 800-1500 times spray.

3. Persimmon stalk worm: 5 from early June to early June, the first generation larvae were harmful from late May to early July, and the second generation larvae began to harm until harvested in mid-July. In mid-late June and mid-August to early September, be sure to pick the damaged fruit and bury it deeply. In the peak period of adult occurrence, spray with 1000 times liquid of 90% trichlorfon.

How to control diseases and insect pests in persimmon trees

The main pests of persimmon are shell worm, persimmon stem worm, persimmon caterpillar and so on. The main diseases are angular spot and round spot, comprehensive control measures:

1. In early winter, thoroughly clean the orchard, remove the persimmon stalks on the residual trees, and clean the fallen leaves, diseases, pests and branches around the persimmon trees, so as to remove the overwintering places of diseases and pests such as round spot, corner spot and persimmon stalk moth, and reduce the harm in the coming year.

2. In winter, the old thick warped skin on the trunk and big branch is scraped and destroyed, and the trunk is painted white after scraping, which can eliminate persimmon stalk worm and grass paramecium.

3. Chemical control, persimmon trees should be carefully sprayed with 5 Baomedu stone sulfur mixture before germination, and alternately spraying multi-dose Bordeaux solution, mancozeb and methyl topiramate from early June to early August for disease control, and according to the occurrence of insect pests, timely spraying control.

Planting environment of persimmon trees

1. Temperature: persimmon likes temperature and is cultivated in places where the average annual temperature is 10-21.5 ℃, but the most suitable annual temperature is 13419 ℃. In the south, where the average annual temperature is 19-21.5 ℃, the fruit quality is poor and sunburn is easy to occur. In the north, where the average annual temperature is 10-13 ℃, freezing injury occurs in a few years, and it has strong cold tolerance in dormant period and can withstand short-term low temperature of-20 ℃. Sweet persimmon prefers warmth to astringent persimmon, and its cold resistance is not as strong as astringent persimmon.

2. Moisture: persimmon root system distributes widely and deeply, with strong drought resistance, where annual rainfall is more than 450 mm, generally does not need irrigation, but long-term drought will also affect root, branch, leaf and fruit growth, aggravate fruit drop, northern spring and autumn drought, if timely irrigation, it can significantly increase yield, continuous rain in summer can easily lead to disease epidemic, persimmon rootstock root respiration is small, strong tolerance to anoxic environment, more tolerant to moisture.

3. Light: Persimmon is a light-loving tree species. When the light is sufficient, the shoots are stout, the flower bud differentiation quantity is good, the fruit setting rate is high, the fruit color is good, the organic nutrients are accumulated, and the sugar content is high.

4. Soil: Persimmon has strong root system, wide range of fertilizer and water absorption, and lax requirements on soil. no matter mountain, hilly, river beach, plain, fertile and barren soil, or sand and clay can grow, but the growth results are the best on loam and clay loam with soil depth of more than 1 meter and groundwater level below 1 meter, and can be cultivated within the range of pH5~8. PH6~7 is the most suitable for cultivation. The growth of pH > 8 salt content 0.026gb is poor.

In the above, the editor also popularized some methods about persimmon planting. Have you all learned it? In fact, many fruits in the market are treated with ripening agents and pesticides, so if there are conditions at home, it is also a very good thing to plant some fruit trees.