What to do if a eucalyptus tree gets a dry blight What to do if a eucalyptus tree gets bacterial wil

In recent years, eucalyptus.

The area of fungal diseases such as shoot blight has increased year by year, and has become the focus of eucalyptus pest control.

There are certain rules to follow in the onset of eucalyptus tree blight

It is easy to occur in areas with high humidity, such as gullies, reservoirs, ponds, and rivers at the foot of mountains.

Areas with poor ventilation conditions such as mountain nests and foot of mountains are prone to occur;

In the early stage, the main occurrence area was below the middle of the mountain, and the disease rarely occurred on the top of the mountain. In the later stage, the disease occurred in the whole mountain.

In the early stage of the disease: the edge of the leaf is yellow, the leaf has yellow spots, and there are yellow fungal spores on the back of the leaf.

Middle stage of the disease: With the aggravation of the symptoms of eucalyptus leaf spot, the branches and shoots begin to secrete gelatin, the epidermis of the young shoots appears colloidal crusting, the conduction tissue is affected, and the tender shoots begin to appear dehydrated and dry after the symptoms are aggravated.

Later stage of the disease: with the aggravation of the symptoms of dry shoots, the conduction system of eucalyptus is further damaged, the symptoms of leaf spots are aggravated, the leaves turn yellow further and begin to fall off, the dry shoots and young shoots are aggravated, the phenomenon of top shoots and whole branches die, the growth of eucalyptus is hindered, and finally, the whole leaves fall off, the branches dry up, and the growth is basically stagnant.

Prevention and control recommendations. 1. Eucalyptus treetip blight is a fungal disease, and fungal fungicides should be used for prevention and control;

2. Fungicides are divided into protective agents and first-class agents, and the early protective agents have a certain prevention and control effect, and the first-class agents should be selected after the aggravation of the disease in the later stage, and can be supplemented with antibiotics and strengthen fertilizer and water management.

Protective fungicides: methylcarbendazim, methylcarbendazim.

carbendazim, azoxystrobin, pyraclostrobin.

Wait; **Fungicide: difenoconazole.

Wait; Antibiotics: polyantimycin, etc.

3. Technical essentials of powder spraying prevention and control:

Pre-spraying (3-5 months) should be carried out in the early stage of the disease, focusing on the prevention and control of mountain nests, gullies, ponds and other prone areas, protective agents, ** agents have a certain prevention and control effect. Prevention and control methods: young forests can be sprayed, mature forests can be sprayed with powder, and spraying should be sprayed before 9 o'clock in the morning.

Medium-term spraying (6-7 months) due to the large area of the disease area, it is advisable to spray from the foot of the mountain upwards, the foot of the mountain should be sprayed heavily, the top of the mountain can be appropriately reduced the amount of spraying, the agent should be selected ** agent, at this time the protective agent prevention and control effect is greatly weakened.

Later spraying (8-9 months) because the branches and leaves have been seriously damaged, the recovery period after the control is longer, the tree body is weak, you can consider top dressing after October, the control agent should be selected ** agent + antibiotic.

Eucalyptus has bacterial wilt, and there are several main ways to control it.

1.At present, the most effective control measures for this disease are to breed resistant varieties, and avoid the use of high-susceptibility clones in afforestation in areas where bacterial wilt is common.

2.Crops that have been planted (or indirectly planted) before are planted in the woodlands such as peanuts, tobacco, eggplant, peppers, potatoes, tomatoes, cassava, etc.

3.Seedlings that have died of disease should be taken out of the woodland and burned after the root system should be dug up in time, and quicklime should be applied around the perimeter of the outbreak point to prevent the spread to the periphery.

4.At the beginning of the disease, the lesion was drenched with quicklime water; Or potassium permanganate 1000 times liquid, 75% dixone 200 times liquid irrigation roots.

5.In forest areas where the incidence of bacterial wilt is severe, it is recommended to plant other tree species.

Summary. Hello, eucalyptus in the air humidity, high temperature, sultry environment, the most susceptible to infection, general scorch blight will not lead to the death of eucalyptus, and when the air is dry in autumn, eucalyptus will resume growth, but particularly serious plants will also die. The best time to combat this disease is at the beginning of the disease, mainly by spraying pesticides and clearing woodland to enhance ventilation.

Eucalyptus trees are slowly dying, what's going on?

You disturb the forest, eucalyptus in the air humidity, high temperature, sultry environment, the most susceptible to infection, general scorching blight will not cause eucalyptus death, and when the air is dry in autumn, eucalyptus will resume growth, but particularly serious plants will also die. The best time to control this disease is in the early stage of the disease, and the treatment method is mainly to spray pesticides and clean up the Lin Chang Li stove to improve ventilation.

Does sprinkling quicklime on the roots kill germs?

Pesticides can be sprayed with quicklime, and the effect is not too great.

What pesticides are good to spray?

You can choose 20% thiomycete copper-dissolved limb fluid, 72% agricultural streptomycin, and 20% leaf lifting pyticozole spraying for prevention and control, spraying 2-3 times continuously, and spraying 1 time with positive difference at an interval of 7-10 days.

Are these pesticides expensive?

Not very expensive. Is it a combination of three pesticides? Or is it one of the three?

Together.

Hello pro-noiss, strengthen the technical measures of eucalyptus forest: timely tending, cutting miscellaneous materials, enhancing the ventilation and permeability of eucalyptus forest, applying professional eucalyptus fertilizer, enhancing tree potential, promoting the growth of forest trees, enhancing disease resistance, and effectively reducing the occurrence of diseases. Timely detection:

Eucalyptus farmers need to visit the woodland frequently, prevent and control the affected areas in time, and cut off the diseased branches and leaves during the onset period to prevent them from spreading. Pesticide control: In the past, the young forests and the surrounding woodlands of the severe disease of withered oranges should be sprayed with drugs in advance to prevent the occurrence of diseases.