There must be no orchard in the orchard, and the "first line of defense" in the spring garden will be greatly combed!
Spring garden work is the foundation of all orchard management, and it is also the first line of defense for fruit trees management throughout the year. It can kill dozens of pests and kill one.
It seems to be a simple matter, but it is not easy to operate. The Qingyuan Garden is not clear, the germs are not killed, the pests and diseases are serious, and the management of the year will become more troublesome.
At present, the weather is getting warmer, and it is time to go to the Orchard Clearing Garden. What questions do we need to know about the Spring Garden? Let’s see it together!
Question 1: After the cold winter, most of the pests have frozen to death, is it necessary to carry out the spring clearing?
Reply:
The Qingyuan has two main times in a year, one is autumn and early winter, and the other is spring.
Many people think that the winter has been cleared, and after a cold winter, the germs have been killed, and it doesn't matter if the spring clears the garden.
This is actually a wrong concept.
When the temperature rises to about 16 degrees in early spring, the insects will be unearthed and there are many germs that are hidden in the branches or soil for wintering. They can not completely freeze them in winter, and they will re-infect the plants after the spring temperature rises.
Therefore, the spring garden is very important. Even if it is carried out in the early winter, it is necessary to continue the garden in the spring.
Question 2: When is the Qingyuan better?
Reply:
Although the temperature changes in different regions are slightly different, they are probably concentrated in the middle of March and the end of March.
note:
This period of time often has a round of cold springs, so always pay attention to the weather changes, choose the appropriate Qingyuan time.
Question 3: What do you want to do in the Orchard Clearinghouse?
Reply:
(1) Thoroughly cut off the pests and branches
Thoroughly remove the decaying diseased branches, powdery mildew branches, smashed branches and dead leaves and dead fruits on the trees, clean the fallen leaves, fallen branches, diseased fruits and packaging wastes, and burn them in a concentrated manner. thorough.
(2) scraping the old skin
Scrape the old skin, completely scrape the old skin and disease spots caused by rot disease, branching wheel disease, and apply the medicine (stone sulphur mixture) in time.
(3) Tree spray
Grasp the key medication period (described later) and pay attention to the underground and underground spraying.
(4) Tree tray processing
The soil in the range of 1 m around the trunk is treated with chemicals to control pests such as the heartworm, the chafer, and the apple aphid.
(5) timely topdressing
Before germination to flowering, according to the age of the tree, the tree potential and the target yield, combined with the application of the base fertilizer, the method of applying the radiation ditch or spreading and shallow turning to topdress the tree in the tray, with nitrogen fertilizer as the main, promoting the growth of spring shoots and young fruit. development.
Question 4: When is the Qingyuan Pharmacy sprayed?
Reply:
Grasp the key period of spraying.
It is usually done after the convulsions (probably the bud cracking period).
According to the local temperature rise, the situation is strictly clear. If the temperature is less than 18 °C, it can be postponed for a few days. In short, the spraying effect is better.
Grapes are in the pompon period.
Apples and pears are sprayed during the red period of the flower.
This period is mainly to prevent some diseases and insect pests such as red spider, leaf curler, grape green scorpion, black pox, anthracnose.
Question 5: How to choose the Spring Clearing Pharmacy?
Reply:
Spring temperature fluctuates greatly, and it is hot and cold.
The time of emergence of pests and pathogens often tends to be long, which requires a long-lasting effect of the clearing potion. If the agent can quickly pass through the protective layer, it will lurk in the bark, diseased branches, and disease. The pests or pathogens in the buds will also be better.
Therefore, the Qingyuan Pharmacy not only has a long-lasting effect, but also has a strong permeability.
When selecting a drug, it is necessary to look at the active ingredients of the drug, and also to see if the dosage form of the drug has the above two points.
Qingyuan common pharmacy
For most fungi, bacteria, viruses, wintering pests and eggs, the most commonly used is the stone sulphur mixture (although it does not work well for rot and rough skin disease).
For orchards with severe dermatosis, you can choose:
Methyl thiophanate cream (scrape smear), tebuconazole, carbendazim and other agents.
For orchards with severe rot disease, you can choose:
Copper humate (paste application), copper rosinate, thiazolone, spirulina, prochloraz, and oxazolol, tebuconazole or epoxiconazole for stalk application and spraying, together with triazole The fungicide can prevent powdery mildew and reduce the base of powdery mildew.
Question 6: How is the general stone sulphur mixture controlled?
Reply:
(1) Raw materials and ratio
The stone sulphur mixture is made of quicklime, sulfur and leeches. The ratio of the three is 1:2:10~12.
(2) Method of tanning
First, weigh the high-quality quicklime into the pot, add a small amount of water to digest the lime, then add enough water, heat to boil, filter the residue, and then slowly pour the sulfur paste prepared with a small amount of hot water from the pot. While stirring constantly, write down the water line and cook it with fire.
When the water boils, it starts to count and keep boiling for 40~60 minutes. The water lost in the cooking should be replenished with hot water in time, and it should be added 15 minutes before the ceasefire.
When the solution in the pot is dark brown red and the slag is yellowish green, the heating is stopped.
After cooling filtration or precipitation, the supernatant is the stone sulphurizer stock solution.
Usually, the concentration of the stone sulphur mixture is expressed in terms of Baume, and the higher the Baume degree, the higher the active ingredient content.
Question 7: How to use stone sulphur mixture?
Reply:
(1) Drying
Brush 0.5~1 Baumeite sulphur mixture or 45% crystal sulphur mixture 100~150 times evenly on the dried fruit branches, which can effectively control the dried fruits and diseases of fruit branches, such as rot disease, dry rot, Ulcer disease, scale insects, spider mites, and beetles.
(2) Spray
Before the fruit tree is germinated, it can be controlled by spraying 3~5 Baumeite sulphur mixture or 45% crystal sulphur mixture 25~30 times to control fruit mites (red spiders), scale insects or aphids.
Note that when spraying, spray all over the ground and underground.
(3) Irrigation
Centering on the trunk, dig 3 to 5 radial grooves with a width of 35 to 40 cm and a depth of 25 to 40 cm. The inside is shallow and deep, and the length is up to the periphery of the canopy. The root is filled with a wave of sulphur sulphur mixture, and then the soil is covered. It is applied once a year in early spring to effectively control root rot of fruit trees.
(4) doing wound treatment agent
The sulphur sulphuric acid solution is sterilized and scratched or coated with large kerf and mechanical wounds to reduce the infection of harmful bacteria and prevent the occurrence of fruit tree rot, ring rot, ulcer disease and gum disease.
Pay special attention to:
It is easy to cause phytotoxicity to young tissues of grape, peach, pear and other fruit trees, and should be used with caution.
Source: Daily agricultural materials
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