Do you know what methods are effective in controlling cedar pests and diseases?

There are some effective methods to control cedar plant pests and diseases, different pests and diseases have different control methods, such as maintaining drainage and ventilation, such as not using too dense plants, pruning plants properly, and spraying some chemicals in time to prevent insects.

The main pests and diseases of cedar are gray mold, leaf blight and root rot, scale insects, aphids, etc., and different pests and diseases have different control methods.

First of all, let's introduce gray mold and its control. This disease mainly causes the young shoots of cedar to wither and the twigs to wither. Prevention and control is to be planted in a place with good drainage and ventilation and sufficient sunlight, and it should be sparse and not too dense when planting.

If it is found that pests and diseases have appeared, it is necessary to cut off the diseased branches in time, and spray chemical pesticides to kill insects in time, so as to be able to carry out effective control. <>

Secondly, there are measures to prevent and control leaf blight. In terms of planting, do not choose areas with arid woodland and poor soil. We need to strengthen management to strengthen the resistance of cedars and remove diseased leaves as much as possible to avoid expanding the pests and diseases.

After maturity, spray chemicals for control, every 10 to 15 days or so, two to three sprays each time is enough.

In addition, there are measures to prevent root rot. This disease mainly occurs in the roots, which can cause the roots of the plant to appear water-stained and deteriorate, and even the needles fall off, and the whole plant will wither. We need to improve cultivation techniques, water chemical agents on the roots when we are sick, etc.

In addition, if you encounter some insect pests, such as scale insect damage, etc. During the winter, we need to spray chemicals on the branches. In the winter and summer seasons, prune the plants properly, do not make the plants too dense, and at the same time remove some insect branches, pay attention to maintain ventilation, and strengthen light transmission, which can inhibit the development of insect bodies.

If the insect infestation has occurred, we must remember to spray the corresponding chemical agent to achieve the effect of timely control.

These are some of the measures to control cedar plant pests and diseases.

In the spring, properly disperse some nutrient solution for cedar, and do a good job in field management, remove the surrounding dead branches and weeds, avoid serious pest and disease infections, and spray a certain concentration of pesticides, but also loosen the soil in time, and plough the land.

To do a good job of drainage and ventilation, the sun must be sufficient, the temperature must be suitable, and the disinfectant and nutrient solution should be sprayed in time, so that this disease can be effectively prevented.

Choose a place with fertile soil, remove diseased leaves as soon as possible, choose a place with plenty of light, choose a place with more moisture, and spray chemical pesticides in time.

It is necessary to choose the right varieties for planting, pay attention to ventilation, pay attention to drainage, use too many chemical fertilizers, and try to pay attention to density when planting.

Cedar should be placed in a sunny, ventilated and moist place. In summer, it can be properly shaded when it is hot, and it is more cold-tolerant in winter, and the area north of the Yangtze River should be moved to indoor wintering.

2. Watering: Cedar has a certain drought tolerance, afraid of water stains, the potting soil should be kept moist as well, and the potting soil should be watered only when the potting soil is dry, and watered thoroughly. When it rains for a long time, it should be noted that no water can accumulate in the basin, and the basin can be tilted down to facilitate drainage, and the basin will be restored in time after the rain stops.

3. Fertilization: Cedar should use fermented and rotted human manure and cake fertilizer, and household fertilizer should be mainly cake fertilizer. Fertilization time in April and May is appropriate, pay attention to fertilizer water should not be too thick, the number of times should not be too much, 2 3 times a year can be applied.

4. Pruning: The pruning of cedar can be carried out during the dormant period in winter, and the overlapping branches, cross branches, dead branches and long branches can be pruned. Cedar needles grow in clusters at the tips of short branches. During the growth period, the overly long branches can be pruned at any time, and the straight branchlets on the side branches can be topped to make them germinate more short branches and clusters of needles, so that the thickness of the cloud sheet is increased to maintain a certain tree shape.

5. Repotting: It is advisable to repot every 3 or 4 years to germinate in the spring in March and April. When turning the pot, remove about 1b2 of the old soil, cut off the rotten roots, replace it with loose and fertile culture soil, cover it with moss and water it, and put it in the shade for half a month.

6. Pest control:

Cedar diseases mainly include standing blight, leaf blight, etc., which can be sprayed with 500 800 times of Dixon or 50 800 times of antibacterial special solution for control. The insect pests mainly include big bag moth, pine poison moth, red wax scale, red spider, skin worm, etc., which can be sprayed with 80 dichlorvos 1000 1500 times for control, and can also be sprayed with 50 marathon emulsion 1000 times.

Botrytis is mainly harmful to the annual shoots and two-year-old twigs of cedar, which can be divided into three types: shoot wilt type, ulcer type and twig wilt type. The prevention and control methods are as follows:

1. Cedar should be planted in a place with good drainage and ventilation and sufficient sunlight, and should not be too dense when planting.

2. Cut and destroy diseased branches in time.

3. When the disease occurs, it is necessary to spray 1000 times of benzelat wettable powder and other chemical agents in time for effective prevention and control.

Leaf Blight Drought of woodland, poor soil, pests and diseases and improper management can all contribute to the occurrence of leaf blight. The prevention and control measures are as follows:

1. Strengthen management and enhance the disease resistance of cedar.

2. Remove diseased leaves as much as possible to reduce infection**.

3. After the ascomycetes are matured, spray chemical agents such as Baumé stone sulfur mixture, or 65% wettable Decente 8 times liquid for prevention and control, and need to be sprayed 2-3 times, every 10-15 days or so.

Root rot occurs in cedar roots, especially new roots. The initial lesions are light brown, and then gradually turn dark brown and black-brown, and the cortical tissue is water-stained necrosis. When the disease is severe, the needles fall off and the whole plant dies. The prevention and control methods are as follows:

1. Improve cultivation technology and strengthen management.

2. At the onset of the disease, the roots are watered with ethylphosphine aluminum, Ruixin mold, dixone and other agents.

Cedar insect pests include red turtle wax scales, scale insects, etc. The general measures that can be taken are as follows:

1. Spray 3 5 Baumé Salix mixture on the branches during the wintering period.

2. In winter and summer, it is necessary to properly prune the plants, remove overly dense branches and insect branches, and strengthen ventilation and light transmission to inhibit the development of insect bodies.

3. When insect pests occur, spray corresponding chemicals to prevent and control them.

Cedar root rot.

Bai1. Symptoms: Occurs in the roots of cedar du, with the occurrence of new roots.

There are many DAOs. The initial lesions are light brown.

The color of the plate is right, after dark brown to black-brown, and the cortical tissue is water-stained and necrosis. After the tree is infected, the resin overflows above the base of the stem, and the diseased part is not dented; After the young tree is infected, the endothelial tissue of the diseased part is water-stained, softens and decays without foul odor, sometimes it is standing and withering, the aboveground part is green and yellow, and the cortex is dry and shrunk. The symptoms of infection are not obvious at the beginning of the infection, and when the needles fall off in severe cases, the whole plant dies.

2. Occurrence law: soil-borne diseases are mostly infected from the root tip, cut and wound. High groundwater level, stagnant water, deep planting, heavy soil clay and poor soil are prone to disease, and too many roots are injured during transplantation, which is very easy to disease.

3. Prevention and control methods:

Improve cultivation technology and management level.

At the onset of the disease, the roots are watered with ethylphosphine aluminum, Ruixin mildew, dixone and other agents.

Red turtle wax scale. 1. Occurrence law: one generation occurs a year, and the delicate female adults overwinter on the branches, and the peak period of the first hatching nymphs in Nanjing is in the early to mid-June.

2. Appropriate period for prevention and control: early to mid-June.

3. Prevention and control agents:

During winter overwintering, spray 3 5 Baumé determinant on the branches.

In winter and summer, the plants should be pruned appropriately, and overly dense branches and insect branches should be pruned, which is conducive to ventilation and light transmission, and is not conducive to the development of scales.

In early to mid-June, spray chemical agents such as flower protection or petroleum emulsion for control.

The life of the cedar is limited, and the snow comes.

Anyone who has ever known the origin of the pine knows that the life limit of the cedar is only a few decades, and the exhaustion of the life of the cedar will cause the cedar to die

2. At the turn of the four seasons, it is easy to cause the occurrence of some pests and diseases, and many cedars die and it is best to find that pests and diseases are the culprits.

3. Caused by the environment in which the cedar grows, the environment around the cedar is serious.

Kill with enemies, click for details.

1. What kind of insect pest is cedar dripping oil?

2. What to do if the cedar insect pest produces oil.

3. Insect pests and control of cedar.

4. What pests does cedar have?

1.Cedar oil dripping is mostly due to infection with scale insects.

2.Scale insects suck the sap of plants, causing leaves to turn green, and the secretions can also induce coal stain disease.

3.When its components accumulate to a certain extent, small droplets will form on the needles, which is the so-called oil dripping phenomenon.

4.In this case, it is recommended to spray as soon as possible, and imidacloprid can be sprayed for elimination.

5.It is also necessary to prune properly, and cut off the branches that are infected with insect pests and those that are too dense.

Cedar is a cedar plant of the family Pinaceae, it is an evergreen tree with a pinnacle-shaped crown, flat branches, and slightly drooping branches, which is a common landscape tree species.

Today we will talk about the key points of cedar cultivation management, focusing on the cedar planting time and planting method.

1. Cedar planting time.

For cedar, it is more suitable to plant in early spring, the climatic conditions are better, and sowing in March and May is suitable for the growth of cedar seedlings.

Or sow in October-November, the germination rate of cedar seeds sown in these two time periods is the highest, and the climate temperature is basically about 10-25 degrees, which is suitable for the growth of cedar seedlings.

2. Planting and transplanting methods of cedar.

Cedar flowers need to be pollinated manually due to the different formation times of male and female cones.

Propagation is mainly based on cuttings, especially hard branch cuttings are suitable for spring cuttings, and sowing can also be used.

The transplant is usually carried out from November to 34 of the following year, but it is necessary to avoid freezing.

When transplanting, you need to bring soil balls, you need to choose a high dry and well-drained place when planting, the tree hole should be slightly larger, the soil ball should generally be higher than the ground 1 4, the soil should be tamped, watered thoroughly and covered with soil, and the surrounding of the root should be piled into a steamed bun shape, and the pile should be fixed to prevent the wind from shaking and affecting the survival.

3. Key points of cedar cultivation management.

In terms of management, attention should be paid to the protection of the top tips and the lower branches and small columns of the tree canopy.

The top tip grows faster, the texture is soft, often curved, and it is easy to be blown by the wind and damage the tree shape, so it should be guided by a thin bamboo pole in time; The lower part of the curved large branches and small branches make it naturally arch close to the ground to form a beautiful and natural posture.

Fourth, the garden use of cedar cedar tree is tall, beautiful and magnificent, and Araucaria, Japanese Hop Pine Gold is known as the world's three famous garden ornamental trees, and the Golden Pine, Japanese Golden Pine, Araucaria, Giant Sequoia together known as the world's five major park tree species.

Cedar is best planted alone on lawns**, in front of buildings, in the center of a garden or next to major buildings and at the entrance of garden gates, etc., and is also an excellent street tree.

Because it can secrete fungicide, it is an excellent material for building health forests.

Cedar wood is solid, dense in texture, resin, aromatic, less warping, durable for construction, bridges, shipbuilding, etc.