What pesticides should be used to treat eucalyptus trees eaten by insects 30

1. Disease prevention Scorch blight, bacterial wilt, stem rot and gray mold are common diseases of fast-growing eucalyptus. Scorchroida is mainly manifested as gray-green water stains at the junction of healthy tissues and diseased spots, and the leaves are dried and shed. Bacterial wilt can occur throughout the growth cycle of fast-growing eucalyptus trees, which is mainly manifested by wilting, wilting, drooping and dying within a few days.

Stem rot is characterized by white water-stained spots at the base of the plant's stem, which then turn brown and black. Botrytis is characterized by the formation of fungal molds on the surface of plants. The prevention and control of fast-growing eucalyptus diseases should adhere to the principle of prevention first and combination of prevention and control.

First of all, thorough disinfection should be carried out during the planting process to prevent the introduction of germs with the seedlings, and the drainage system of the planting area should be kept normal to cut off the transmission route of germs. Also pay attention to reasonable fertilization. In addition, chemicals such as Bordeaux liquid, chlorothalonil, methyl tobuzin and other substances can also be used for sterilization.

2.Pest PreventionTerrestrial termites are a common pest of fast-growing eucalyptus trees and usually occur in the young forest stage. Termites first damage the roots and stems of young trees, then turn to the surface and ground, stripping the taproot and root clough along the topsoil, and eventually the seedlings are unable to deliver nutrients and die.

The prevention and control of ants should focus on prevention, and they should be trapped. During afforestation, 3 4g of carbofuran can be placed in the hole, mixed with soil-based fertilizer, and then filled in the hole, and the drug is used every 667m2. After afforestation, 2g of carbofuran can be placed at a distance of 5m from the tree pocket, and the dose is each, and attention should be paid to avoid contact between the powder and the sapling when using the medicine.

Fast-growing eucalyptus is one of the fastest-growing tree species in the world. Reasonable cultivation techniques are of great significance to improve eucalyptus yield. Every aspect of fast-growing eucalyptus cultivation and management affects its final yield.

The use of scientific planting technology and strengthening the prevention and control of pests and diseases will surely achieve the purpose of rapid increase in yield. 3.Weeding artificially lay a layer of black film with a thickness of 1m2 of 5 lines, and then press the surrounding edges with soil, which shall prevail if the wind blows.

Or use thinner agricultural film (1 1 or. It is recommended to lay the agricultural film in strips with meter width, which saves labor and time. It is estimated that the cost of 1m2 black film (non-degradable) is per plant; Agricultural film (degradable)** is per plant, and the life span can generally reach 10 to 12 months.

The method of using farmland film does not need to be weeded within one year, and at the same time has good heat preservation, water retention and insect prevention functions.

Summary. Hello, hello, you can use 600 times of trichlorfon plus a small amount of kerosene or 1000 times dimethoate or inulin (according to the concentration used) to spray and kill.

Hello, hello, you can use 600 times of trichlorfon plus a small amount of kerosene or 1000 times dimethoate or inulin (according to the concentration used) to spray and kill.

What's going on with such a press tree.

The leaves are yellowish. Caused by external factors, such as high winds, excessive exposure to wheels, or watering not dried in time. If it is caused by lack of water (generally the leaves will roll up, and the new leaves will be slightly realized), replenish the water in time, and if it is caused by strong winds and excessive storms, it may resume after a period of time to continue to observe.

Lack of fertilizer will also cause the leaves of the plant to turn yellow, first supplement nitrogen fertilizer, and then supplement the fertilizer with the balance of the wax liquid, which can be supplemented with flushing fertilizer fast shirt bending speed. If the pH value of the soil is too high, the EC salinity is too high, and the pH value is too high, which will cause the absorption of Fe iron in eucalyptus trees. The same is true for high EC.

Or supplement nitrogen fertilizer first, and then supplement balanced fertilizer, you can use flush fertilizer to quickly replenish, try it.

A lot of the heart in the middle is broken.

Have you been windy lately?

It is also possible to scorchroid, eucalyptus scorch wilt can be sprayed with pesticides such as Bordeaux liquid, chlorothalonil, methyl tobuzin and other pesticides for sterilization. In addition, 3-6 ml of 30% soil bacteria can be diluted with water per square meter and then sprinkled for disinfection of Jane's bottom; Maintain the normal drainage system of the planting area and cut off the transmission route of the disease; Remove the diseased branches in the ward in time, and collect the oranges to be scattered and burned.

Prevention and control of diseases and insect pests in young forests: timely uprooting of blight and wilt plants, disinfection of disease holes with lime powder; Branch and leaf diseases such as scorch blight, shoot blight, and red spot should be prevented and controlled when the occurrence area is small and the harm is not too serious, and appropriate fungicides can be selected and sprayed according to regulations; Termites that are harmed again on the forest land should be diluted with termite medicine and controlled step by line, and appropriate fungicides can be selected and sprayed according to regulations; For termites that are harmed again on the forest ground, it is advisable to dilute the roots of the seedlings with termite potion, row by row, and plant by plant; For newly occurring aphids and other stinging and sucking pests, spray them equally with systemic insecticides as soon as possible; For leaf-eating pests such as inchworms and bouch moths that are about to or have become seriously infestation, they should be sprayed with poisoning, contact chemicals or biological pesticides; For tall and large trees, it is advisable to use a high-horsepower forest sprayer to operate, or use a suitable powder to reach the tip end of the forest by mechanical spraying.

Abstract Hello, eucalyptus has insects, you can apply lime water one meter to one meter high on the body of the eucalyptus tree, and put a little lime powder and lime paste on the surface of the soil.

It can also be mixed with lime + sulfur, and it is also possible to paint trees.

Lime, sulfur, will kill bacteria, insecticide.

How to spray eucalyptus trees if they are too high.

Hello, eucalyptus trees have insects, you can apply lime water one meter to one meter high on the body of eucalyptus trees, put a little lime powder on the surface of the soil, lime paste can also be lime + sulfur mixed with water, and trees can also be lime, sulfur, sterilization, insecticide.

Eucalyptus trees are bitten by nameless insects.

Apply a little lime to kill insects.

Spraying has no effect.

Try with lime powder.

Summary. Dear, I'm honored to have your question The information that the teacher found for you here is: How to spray eucalyptus trees with insects that are too high:

How to spray eucalyptus with insects is too high before afforestation, under the nutrient cup, apply 5-10 grams of carbofuran 3% granules per plant, or use the same method to apply 5-10 grams of green worm green per plant. Insect pest control Soil-dwelling termites are common insect pests of fast-growing eucalyptus, which usually occur in the young forest stage, termites first damage the rhizomes of young plants, and then turn to the surface and above ground and strip the taproot and inverted roots along the topsoil, and finally make the seedlings unable to transport eucalyptus termites can be controlled by Metaverium aeruginosa with pharmaceutical preparation; Grubs can be diluted with pesticides trichlorfon and methamidophos into 600-800 times and sprayed on the leaf surface; Eucalyptus microcurly moth can be controlled with 1000 times dimethoate; Eucalyptus big bag moth can use 80% dichlorvos emulsifiable concentrate and 40% kill borer.

Dear, I'm honored to have your question The information that the teacher found for you here is: how to spray eucalyptus with insects that are too high: How to spray eucalyptus with insects that are too high The method is to apply 5-10 grams of carbofuran 3% granules per plant under the nutrient cup before afforestation, or use the same method to apply 5-10 grams of green worm green per plant.

Pest control Soil-dwelling termites are common insect pests of fast-growing eucalyptus, which usually occur in the young forest stage, termites first damage the rhizomes of young plants, and then turn to the surface and above ground and strip the taproot and inverted roots along the topsoil, and finally make the seedlings unable to transport eucalyptus termites can be quietly formulated with Metarhizium aeruginosa for pharmaceutical control; Grubs can be diluted with pesticides trichlorfon and methamidophos into 600-800 times and sprayed on the leaf surface; Eucalyptus slag moth can be controlled with 1000 times dimethoate; Eucalyptus sachet moth ear code can be used 80% dichlorvos emulsifiable concentrate, 40% borer.

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Yes

(1) The symptomatic manifestations of eucalyptus bacterial wilt can be divided into two types:

1 Acute type.

The leaves of the diseased plants lose water and wilt rapidly, and the leaves hang on the branches without falling off, showing typical symptoms of "wilt". For this type of diseased strain, the time required from the onset of the disease to the death of the whole plant is relatively short, generally only 2 to 3 weeks.

2 Chronic.

The diseased plants are stunted and short, and the lower leaves first turn purple-red, then gradually deepen and develop upwards, and finally the leaves dry up and fall off. Some stems and lateral branches have irregular black-brown necrotic spots, and the whole plant dies in severe cases. This type takes a long time from the onset of the plant to the death of the whole plant, generally 3 to 6 months.

Bacterial wiltPrevention and control measures:

1. Choose disease-resistant strains;

2. Do a good job of seedling quarantine out of the nursery, and try to avoid going up the mountain with illness;

3 Try not to create eucalyptus forests on woodlands prone to Fur solanacearum (soils where plants such as peanuts, tobacco, potatoes, tomatoes, mulberry, kapok, casuarinas and cannas have been planted);

4 Do not apply unrotted organic fertilizer;

5. Strengthen tending management and improve the disease resistance of forest trees.

Scorch wilt (ii) scorch blight.

Scorch blight, commonly known as defoliation, is a disease caused by high temperature and humidity conditions, mainly affecting the leaves and shoots of eucalyptus trees. In the early stage of leaf infection, water stains appeared, and with the gradual expansion of the lesions, the necrotic tissue showed a burning shape, accompanied by a reddish-brown halo on the edge, and the lesions gradually turned gray-brown in the middle stage, and the leaves were scorched and fell off. In the later stage, it will infect the branches, and the epidermis of the branches will appear round or elongated spots, and gradually shrink to form longitudinal cracks, which can seriously expand to the entire trunk, causing the whole plant to dry up and die.

Prevention and control measures:

Choose well-drained land for afforestation, do a good job of drainage ditches in low-lying land, and the planting density should be appropriate, not too dense;

Choose Bordeaux liquid, chlorothalonil, methyl tobuzin and other chemical agents for sterilization.