What to do if lavender grows aphids, lavender pests and diseases

Pepper water: take 50 grams of red dried chili peppers, add 1000 grams of water and boil for 15 minutes, filter and spray with its supernatant. It can control whiteflies, aphids, red spiders, etc.

Wind oil essence: dilute 600-800 with wind oil essence and spray with liquid. It can control aphids, scale insects, red spiders, moths, butterflies and other larvae.

Garlic: Take 250 grams of purple garlic, soak in water for 30 minutes, mash to extract juice, dilute about 10 times with water and spray immediately to prevent aphids, red spiders, earthworms, etc.

After killing twice, change the method, because aphids are particularly resistant to pesticides.

If the above gentle methods do not work, then you have to go to the flower market to buy insecticide spray, be careful not to spray too much, it will also dry up the leaves.

Aphid control: In summer and autumn, especially after flower cutting, some lavender gardens have swarms of aphids that eat the leaves of lavender and hinder healthy growth. Use 40% dimethoate emulsion 800-1000 times to spray the whole garden once.

can achieve a good prevention and control effect.

Spider mite:

Lavender's red spider is a type of mite. The main encroachment damages the leaves, so that the leaves lose their vitality, showing wilted and dry yellow rust spots, the rusted leaves can not carry out normal photosynthesis, and the whole lavender garden can not bloom and head in serious cases.

After cutting the flowers every year, spray the whole garden with avermectin 3000 times, and spray carefully when spraying, and spray the leaf surface and the back of the leaf. After 10 days, spray again to achieve a good control effect.

Lavender leaf spot The symptoms of annual seeded seedlings and cuttings are wilting, dehydration, dull color, crooked branches, and in severe cases, the roots are wilted and rotten, and the stem ducts turn brown. In addition to the above symptoms, seedlings that are more than three years old also have wilting symptoms, which expand from the inside to the outside in the center or edge of the plant, and the branches wilt and die until the whole plant dies.

The main prevention and control methods are to spray Bordeaux liquid 1:200 to prevent 2 3 times, or 500 800 times of zebze.

Lavender root rot Because the lavender seedlings do not return to spring in spring or do not return to spring well, dry up and die, or can return to spring normally in spring, but in the early flowering of the bouquet wilted, continue to drop flowers until all fall off, the diseased plant autopsy can find a large number of vascular necrosis of the rhizome.

There are many ways to prevent this kind of disease, mainly choosing the soil with flat terrain and good drainage and irrigation conditions; When planting seedlings, the seedling shoots of disease-free fields were collected and treated with methyl tobuzin or carbendazim; application of organic fertilizer; Pay attention to the pruning of old branches and diseased branches; Prepare before wintering, bury the soil tightly and evenly; The most important control method is foliar spray with 400 times of 70% methyl tobuzin wettable powder or 500 times of carbendazim wettable powder.

Red spider The red spider mite of lavender is a mite that eats away at leaves, causing them to appear wilted, dry and yellow rust spots.

Its prevention and control methods mainly include timely treatment of litter and leaf litter, cleaning up the environment to destroy the living place of leaf mites; correct tillage methods, reasonable crop rotation, and strengthened water and fertilizer management; Protect natural enemies, release natural enemies, and treat insects with insects. In addition, there are prevention and control methods: in the early stage of the disease, spray evenly with matrine 1000 times, and when it occurs in a large area, spray evenly with 20% dicofol EC 1000 2000 times, or avermectin EC 3000 4000 times, and the control effect is better.

The main control method is to use 50% phosphine EC, 50% pine borer EC, 12% crown insecticide EC and other pyrethroid agents.

Soak the flower branches of the insects in water made from laundry detergent. Spray the plants with pyridoxin or avermectin solution in July, once every 10 days, generally 2-3 sprays are fine.

Aphids are also one of the pests that infest lavender, mostly in summer and autumn, usually in July when a large number of adults gather, they will suck the plant's sap and affect its health. Generally, it is necessary to carry out control in mid to early July, and spraying it once with marathon solution can well eliminate pests. Proper fertilization can also increase the disease resistance of plants.

Lavender planting precautions.

Lavender prefers to grow in warm environments, so it is recommended to plant it in spring or autumn. The temperature in summer is too high, the light is too strong, it is easy to sunburn the seedlings, and the temperature in winter is too low, and the low temperature will affect the seed development. If you want to plant in summer and winter, you must have a good temperature control.

In order to promote a higher germination rate of lavender seeds, it is recommended to promote germination treatment before planting. Soak its seeds in clean water first, and then take them out and put them on wet wipes after a day or two, and cover them with a thin layer of freshness, and poke a few holes on them to ventilate. After processing, put it in a cool, warm environment to promote germination, and wait for white roots to grow before sowing.

If you don't deliberately promote germination, it may take more than a month to germinate when planted directly.

Lavender pests and diseases are prone to occur in the middle of July every summer. That's when you have to manage them well. If you manage them well, the incidence of lavender pests and diseases will decrease.

So what kind of pests and diseases does lavender cause? Are there any ways to control pests and diseases? Here is a brief introduction to the two types of pests that can occur on lavender, mainly red spiders and aphids.

Introduction to lavender pests and diseases.

Lavender's red spider is a type of mite. It mainly damages the leaves, makes them lose their vitality, and presents yellow rust spots, which can not carry out normal photosynthesis, which will seriously hinder the flowering and heading of the entire lavender garden.

The following methods can be used to control spider mites:

After cutting flowers in early July every year, the whole garden is sprayed with avermectin 3000 times once. Be careful when spraying and spray on the back of the leaves. Spray again every 10 days to achieve a good control effect.

Hazards of aphids and control methods:

In summer and autumn, especially after cutting flowers in July, swarms of aphids gather on some lavender plants. These aphids eat the leaves of lavender, hindering the healthy growth of the plant. In the middle and upper part of July, the whole garden was sprayed with 800-1000 times of 40% dimethoate emulsifiable concentrate once.

It can achieve a very good control effect.

Lavender pest prevention method.

Lavender has few pests and diseases, and if managed properly, there are basically no pests. Root rot can occur if not properly managed.

Lavender has few pests and diseases, and if managed properly, there are basically no pests. Root rot can occur if not properly managed. The main pests of red spiders and aphids occur.

The focus of lavender pest control. The following symptoms and prevention methods of red spider mites and aphids are mainly introduced.

Lavender of the spider mites. The main invasion of leaves, the loss of life leaves, shows wilt, dry yellow rust, leaf rust is normal, photosynthesis can not be serious can make lavender flower beds unable to advance.

The following methods can be controlled for leaf mites:

After flowering in early July, cut annually with avermectin sprayed throughout the garden 3,000 times, spray carefully, and the leaves should be sprayed on the suction surface. 10 days after separation, then spray once, you can achieve good control.

Aphid damage and control methods:

In the summer, autumn, especially after July, fresh cut flowers, garden plants have some lavender gathered on aphids, groups, on aphids, leaf lavender feed, hindering the healthy growth of ** with 40 plants in mid-July, fruit emulsion 1000 times, 800 full-time garden sprinkling. Good control can be achieved.

Try not to use toxic pesticides for home potted insects. If a plant with a long worm is found, it is best to isolate it as soon as possible. Some non-toxic solvents can be used to assist in insect control.

1. Aphids. Symptoms: The leaves may be deformed, sticky, curled or turn yellow. Aphids produce sweet, sticky honeydew that attracts ants. Honeydew itself can also grow mold.

Treatment: Touch aphids with cotton soaked in alcohol.

Spray aphids with strong peppermint juice (one part mint to four parts water).

Move the plants outdoors, spray [lavender extract], and then move them back indoors. Apply every seven days, spraying two or three times in a row.

2. Pink scale insects.

Symptoms: The pink shell is oval, with white wax attached, and looks like a hairy insect with a very slow movement. It gathers in the leaves and stems of the plant and sucks the sap of the plant. As a result, the leaves of the plant turn white, the leaves fall off, and the growth is stopped. The mealscale insect itself often carries pathogens and can infect plants.

Treatment: If the quantity is not large, you can use your nails to turn it off the bottom, or you can use a cotton swab dipped in alcohol to kill insects.

Take it outdoors and spray it with soapberry essence before moving it back indoors.

3. Red spiders.

Symptoms: Spider mites are so small that they need a magnifying glass to see them clearly. The leaves of a plant with a red spider plant will curl and fall into the bend, and growth will also stop. The back of the leaf will see the weaving web, and the red spider often hides under the web, and it is not easy to spray the agent

Treatment: Isolate from other plants as soon as possible, spider mites are easily infected and difficult to treat.

Spray skim milk solution: Dissolve 1 2 cups of skim milk with 4 cups of flour and 5 gallons of water.

Spray alcohol solution: 3 times alcohol and 4 times water after application.

Move the plants outside and spray [lavender extract] after spraying. Apply every seven days, spraying two or three times in a row.

Four: scale insects.

Symptoms: Scale insects are white, yellow, brown, gray or black. It appears to be a crust stacked on the stems and leaves, and because it is tightly attached to the plant, it sometimes looks like it is part of the plant. It often turns the leaves yellow and then leaves.

Treatment: If the quantity is not large, it can be removed by hand. However, it is more difficult to get rid of than the pink scale insect and can be scraped off with a knife. You can also use a cotton swab dipped in alcohol and rubbed on the insect to kill it.

Take it outdoors and spray it with soapberry essence before moving it back indoors.

Spray alcohol solution: 3 times alcohol and 4 times water after application.