Sunflower long insects how to do, sunflower pest control/need to correct medication

Sometimes we will find our hard-planted sunflower leaves yellowing or even withering and falling, such a scene is very distressing, then how to do sunflower leaves yellowing? In addition to mastering the correct sunflower culture method, there is another possibility is to grow insects, so what about sunflowers growing bugs? Today, I would like to introduce several commonly used sunflower pest control techniques.

What about sunflowers with worms?

There are many insects that may appear on sunflower plants, among which the more harmful and common ones are: grass borer, sunflower leaf miner, black velvet beetle beetle, net sand latent and yellow-bellied lamp moth. What should we do when we encounter sunflower worms? The worms can be removed by following the following methods.

1. Sunflower leafminer

Potted type: spray trichlorfon or borer-killing pine powder every 3 days until the worms are completely removed.

Nursery planting: dilute 90% trichlorfon emulsion to 1000 times the solution, and then spray it around the leaves and plants, you can successfully remove the leaf miner.

2. Net sand diving

Pot: sprinkle the soil surface with insecticide powder. Each sunflower should use 10-15 grams of insecticide powder.

Nursery planting: use 1.50% methyl 1605 or 0.04% insecticidal powder to remove insects, usually 30 kg per hectare; you can also use 50% methamidophos EC diluted to 1000 times the solution for spraying.

3. Meadow borer

Potted plants: this pest can be found with the naked eye and then scraped off. Of course, it should be noted that the eggs of the meadow borer may remain on the leaves, so pay attention to scraping them away when cleaning.

Nursery planting: spray with 50% phoxim EC or 50% fenitrothion EC, or spray seedlings with 2.5% trichlorfon powder or 0.04% insecticidal powder, 20-25 kg per hectare.

4. Black velvet beetle beetle

Potted plant: this is a very common pest, so what about sunflowers with worms? The answer is that elm leaves, which can be soaked in monocrotophos solution for more than 10 hours, are inserted next to sunflowers in the afternoon, with two per plant, so that the beetles dare not get close to the sunflowers.

Nursery planting: spray with 2% fenitrothion or 2% Baizhi butcher powder, the dosage is about 15 kg per hectare. It can also be sprayed with 35-50% methyl parathion EC diluted to a solution of 500 times.

5. Spodoptera litura

Pot: use trichlorfon powder or carbaryl powder, you need to be careful not to use too much.

Nursery planting: 90% crystal trichlorfon diluted into 1000 times solution for spray, the dosage is 300kg solution per hectare.

Disease and pest control of sunflower

After solving the problem of what to do with sunflower worms, we also need to pay attention to the disease. Among the diseases of sunflower, the most common threats are Sclerotinia sclerotiorum, powdery mildew, brown spot and downy mildew, and different diseases should take different control measures.

1. Sclerotinia disease

It needs to be controlled from the following aspects, namely, reasonable crop rotation, strict seed selection, intertillage sterilization and chemical control. At the initial stage of the formation of the disk, we can choose Sukeling, sclerotia net, Nongliling, Wankuli or carbendazim and other agents for spray control, focusing on protecting the back of the disk. Because the sunflower plant is tall and tall in the later stage, the spraying operation is more difficult, so we can also take the method of hitting in the field after rain to reduce humidity.

2. Powdery mildew

Large area rotation is used to reduce the source of infection; at the same time, chemical control can use 400 g / L flusilazole (Fuxing) EC 0.12-0.14 liters per hectare, but it should be noted that brassinolide plant growth regulators can be added when spraying. It can promote the normal growth of diseased plants.

3. Brown spot

In the prevention and control of sunflower diseases and insect pests, it is very important to strengthen the management of cultivation, such as reasonable close planting, timely weeding, increasing fertilization, and so on. Of course, we can also use pesticides for control. For example, add 0.01% Tianfengsu 150ml per hectare, and so on.

4. Downy mildew

If it is found that the diseased plant should be removed as soon as possible, and burned centrally, and pay attention to the remains of the diseased plant after the autumn harvest; if it is in the early stage of the disease, 72% frost urea can be used. Manganese and zinc wettable powder, 2.5 kg per hectare.

Conclusion: sunflower worms can be avoided, the premise is to understand the composition of sunflower pest control methods, and if you find sunflower insects, it should be removed in time, otherwise it will cause more and more damage to the plant.

Why do sunflowers face the sun? common pest control methods of sunflower

Sunflowers facing the sun is a fact known to three-year-olds, but why does it really stem from a steady stream of love and belief in fairy tales? Or is there any secret that no one knows? As a materialist, we should explore from a scientific point of view.

Why do sunflowers face the sun?

The main reason why sunflowers turn toward the sun is the influence of light.

The auxin of sunflower is distributed above the stem tip and is constantly transported downward, which will be affected by light. Generally speaking, the auxin of sunflower is distributed in backlight, and the concentration of auxin in Shengzhou is relatively low on the other side of the sun, but the concentration of auxin on the side of the backlight is relatively high, so the side of the backlight grows faster and grows slowly toward the side of the light, which makes the stem bend to the sun all the time.

In addition, it is also believed that the reason why sunflowers turn toward the sun has something to do with gravity and lutein. In terms of gravity, sunflowers rotate with the sun in the early stages of growth and in the young stage of the flowerpot; in terms of lutein, it means that this substance can hinder the growth of sunflower cells, and the concentration of lutein on the side of the light is generally higher, so it will cause the sunflower to grow more slowly on the other side of the light, resulting in bending.

Control methods of common insect pests in sunflower

1. Meadow borer

Pests can be scraped off directly when there are few pests, it is best that you have a pair of sharp eyes, pests can be found in the eggs and removed in time.

When the disease occurs, it can be sprayed with deltamethrin EC or fenvalerate EC, diluted with water and sprayed.

The disease of seedlings can be treated with trichlorfon powder or insecticide powder, which can be directly scattered on the bottom of seedlings and in the soil, 10 ~ 15g per plant.

2. Sunflower leafminer

Leaf miners are stubborn and can be sprayed with trichlorfon powder or borer-killing pine powder, once every 2 or 3 days, until they are completely removed.

Of course, you can also use spray to dilute the trichlorfon emulsion into a 1000-fold solution and spray around the plant and leaves.

3. Black velvet beetle beetle

Are you familiar with the common pests at this time? When the plant has dead leaves and rotten stems, the pest comes after it. Can use fenitrothion or Baizhi butcher powder spray soil surface, pay attention to spread evenly.

Spray with 50% methyl parathion EC solution, and the insects can be sprayed directly on the pests.

Select elm leaves with leaves, soak them in monocrotophos solution for 10 hours, then insert them next to sunflowers at 2: 00 p. M., 2-3 per plant. Naturally, bugs dare not come near.

4. Mongolian gray weevil beetle

The easiest way is to spray dichlorvos solution.

Drug-making soil. Mix methyl 1605 powder with wet soil, sprinkle it around the plant, and the pest will be poisoned when it comes close.

5. Net sand diving

Use methamidophos EC 500 times solution spray, spray attention to spray evenly, the back of the leaf should also be sprayed.

Sprinkle the soil surface with insecticide powder, 10g to 15g per plant.

Growth habits of sunflower

Sunflowers can be planted all the year round, and it is best in summer and winter. The growth rate of sunflower is very fast, it only takes about 2 months from planting to flowering, and the longest flowering time is more than two weeks.

How to fertilize sunflowers

1. Base fertilizer

Species: give priority to organic fertilizer and use less chemical fertilizer as much as possible.

Fertilization period and method: families do not need agricultural planting in short, usually mix fertilizer evenly in the soil a few seconds before planting. Or dig several holes 2cm to 3cm deep around the plant after planting and apply fertilizer to them.

Fertilizer dosage: 5: 10g organic fertilizer per plant, if the plant is larger, the amount can be increased appropriately.

2. Planting fertilizer

The main purpose of applying seed fertilizer is to strengthen seedlings, which should be applied in time after seed germination. Mainly choose calcium phosphate to add a small amount of uremia.

Usage: sprinkle fertilizer on the surface of potted soil 3-5 days after seed germination. Or apply 2 cm to 3 cm next to the seed. Combine sowing to apply organic fertilizer and chemical fertilizer 2-3 cm under the seed, or 2-3 cm next to the seed.

3. Topdressing

Species: nitrogen fertilizer is the main fertilizer, potash fertilizer is the auxiliary fertilizer. You can choose urea, potassium chloride and other expensive or mature human feces and urine, plant ash and so on.

Time: according to the plant growth, soil conditions, the application of base fertilizer, reasonable topdressing. But topdressing is mainly concentrated in the period from budding to flowering of sunflowers.

Methods: fertilize the small pit at a distance of 10-15 cm from the sunflower. Pay attention to the depth of fertilization, avoid direct contact with the root system, should be applied in the wet water layer, which is conducive to fertilizer efficiency.

4. Foliar fertilizer spraying

The foliar fertilizer of sunflower is mainly sprayed after budding. Spraying zinc, copper, manganese and molybdenum solution after budding, and spraying nitrogen, phosphorus and potassium solution after flowering can make the flowers bright and bright green.

The sunflower facing the sun is affected by the lutein in the body, which affects the growth angle of the sunflower, but the arrangement of the creator is indeed a miracle of the sunflower's existence. So no matter from which point of view, the existence of sunflowers is of great significance.

A complete Collection of Common insect pests Prevention and Control of Sunflower

Meadow borer

Pests can be scraped off directly when there are few pests, it is best that you have a pair of sharp eyes, pests can be found in the eggs and removed in time.

When the disease occurs, it can be sprayed with deltamethrin EC or fenvalerate EC, diluted with water and sprayed.

The disease of seedlings can be treated with trichlorfon powder or insecticide powder, which can be directly scattered on the bottom of seedlings and in the soil, 10 ~ 15g per plant.

Sunflower leafminer

Leaf miners are stubborn and can be sprayed with trichlorfon powder or borer-killing pine powder, once every 2 or 3 days, until they are completely removed.

Of course, you can also use spray to dilute the trichlorfon emulsion into a 1000-fold solution and spray around the plant and leaves.

Black velvet beetle beetle

Are you familiar with the common pests at this time? When the plant has dead leaves and rotten stems, the pest comes after it. Can use fenitrothion or Baizhi butcher powder spray soil surface, pay attention to spread evenly.

Spray with 50% methyl parathion EC solution, and the insects can be sprayed directly on the pests.

Select elm leaves with leaves, soak them in monocrotophos solution for 10 hours, then insert them next to sunflowers at 2: 00 p. M., 2-3 per plant. Naturally, bugs dare not come near.

Mongolian gray weevil beetle

The easiest way is to spray dichlorvos solution.

Drug-making soil. Mix methyl 1605 powder with wet soil, sprinkle it around the plant, and the pest will be poisoned when it comes close.

Mesh sand diving

Use methamidophos EC 500 times solution spray, spray attention to spray evenly, the back of the leaf should also be sprayed.

Sprinkle the soil surface with insecticide powder, 10g to 15g per plant.