Can spraying common insecticides kill corn aphids?

Corn aphids can be controlled with common insecticides. Insecticides such as imidacloprid and imidacloprid can be used to control corn aphids. Use 10% imidacloprid and deltamethrin spray 2 times.

40% dimethoate 3000 times night spray or 50% aphid wettable powder 15-20 grams, spray with 50-75 kg of water, 5-7 days, 2-3 times.

Corn pests can be controlled with common insecticides. Corn aphids are commonly treated with insecticides such as acetamiprid and imidacloprid. The nitrogen uptake of maize was relatively stable, reaching a peak during heading and silking, and the uptake rate slowed down during grain filling and maturity, and nitrogen fertilizer was absorbed throughout the growth period.

Maize absorbs phosphate fertilizer throughout the growth period, reaches the peak at the male plant pulling stage, and grows vigorously. In the later period, the absorption of phosphorus decreases, but still accounts for about 1 3. The potassium absorption of corn is mainly from jointing to booting stage, to flowering stage, and then stops absorbing potassium.

Conversely, potassium content tends to decrease due to potassium extravasation outside the plant.

Corn aphids can be used for both agricultural and chemical control. Rapid pesticides or imidacloprid are the most effective ways to control corn aphids. When corn is harmed by aphids, it will seriously affect its growth and should be controlled in time.

Imidacloprid and carbazine can be sprayed once a week, three to four times, and are completely controllable. Chemicals can also be incorporated into the fertilizer to control pests during regular fertilization. In addition, when sowing, the medicine and seeds can be mixed together to prevent pests.

Corn aphids usually occur in late July to mid-August. During this time, imidacloprid wettable powder can be used for spray control. For the root system, phoxanthion EC can be used to mix fine soil at the seedling stage of corn to prevent and eliminate weeds.

In the adult emergence stage or the period of 3-5 nymphs per plant, 10% imidacloprid wettable powder 1000 times or 10% nimipramine soluble solution 1000 times or 5% acetamiprid wettable powder 1500 times can be used to control corn fields. Ladybugs and other natural predators are released, which can also be controlled with chemicals.

OK. Spraying ordinary insecticides can eliminate corn aphids, because ordinary insecticides will be effective against corn aphids, and the ingredients in it can destroy aphids.

Spraying ordinary insecticides cannot eliminate corn aphids, or you need to add some high-strength solvents to completely eliminate them.

Of course, many farmers now use this method, and I feel that the effect is really obvious, so I should buy it immediately.

Of course, many farmers will now solve this problem in this way, and the final effect can be said to be very obvious and very effective.

Pesticides can be sprayed moderately during the flowering period of corn, but it should be limited, otherwise it will affect pollination and cause the corn cob to not be full.

The flowering and fruiting period of corn is generally 45-55 days, which is the key period of flowering and pollination, grain filling and enrichment, and if this period is well managed, it will increase the number of ears of corn, the number of grains per ear and the grain weight. So how should the flowering and fruiting period of corn be managed? I would like to share with you 6 management tips!

1. Water enough heading and flower water, promote flowering and pollination, improve seed setting rate, prevent premature aging of stems and leaves, and strive for multi-grain weight of panicles.

2. Watering the grouting and tapping seed water: the leaves of the plant are yellow from bottom to top during the grouting period, and the premature senescence of the plant should be fertilized and watered to increase the grain weight.

3. Drainage: Due to heavy rainfall, the stagnant water in the field should be removed in time.

4. Reasonable dense planting can make full use of light energy, soil power and space, so that the plants can be well ventilated and transmitted, so as to reduce empty poles.

5. Scientific fertilizer and water management, according to the characteristics of each growth period, special attention should be paid to the water and fertilizer management of the ear, such as the topdressing of potassium dihydrogen phosphate, so that the corn can get sufficient water and nutrients during the growth and development of the plant growth and development of good development, reduce empty poles.

6. Do a good job of artificial assisted pollination to ensure that the pollination of female ears completely reduces baldness and grain deficiency.

No, it will affect corn pollination.

1. Reasonable drainage and irrigation: this period is the period when corn needs the most water in its lifetime, if it is dry early and the soil is short of water, it should be irrigated in time to improve the field microclimate, increase the relative humidity of the atmosphere, and be conducive to high yield. In case of excessive rain and waterlogged soil, the ditch should be cleared and drained in time to prevent premature root senescence and reduce the harm of corn sheath blight.

2. Do a good job of artificial emasculation and pollination according to local conditions, reduce the rate of bald tips and empty bracts, and improve the seed setting rate. When one-third of the panicle is extracted, artificial interlaced emasculation or early emasculation is used. When two-thirds of the female spike filaments are extracted, manual pollination 1 2 times can be used.

3. Apply granular fertilizer as appropriate: apply when the female spike filaments begin to be withdrawn. 50 kg of kilogram of urea mixed with water and 2-3% superphosphate solution or spray with 50 kg of potassium dihydrogen phosphate solution per mu.

4. Pest control: too much rain during the flowering period, aphids should be controlled: after heading and flowering, spray the lower leaves or apply rods to prevent sheath blight.

Yes, but pay attention to the application time, the pollination time is generally in the morning, and it is better to spray after 3 o'clock in the afternoon, and do not use organophosphorus and other toxic pesticides. The flowering period is generally 7 days. No matter what crops, flowering is more sensitive, if the pest is not very serious is not recommended to apply, usually pay attention to the occurrence of pests and diseases, seize the critical period of application, prevention first, comprehensive control.

During the flowering period of corn, insecticides can be sprayed to control corn insects.

The flowering and pollination period of corn mainly prevents the occurrence of aphids and corn borers.

Corn can be sprayed with pesticides during the flowering period.

During the flowering period of corn, it mainly controls aphids, armyworms, red spiders and fall armyworm. The use of pesticides for prevention and treatment has a good effect.

Yes, you can use pesticides during the flowering period to ensure the healthy growth of corn.

It should be best not to use pesticides in your flowering machine, because if you use pesticides, it should be possible that you will eat corn about some toxins, and this should use some drugs these days, I think this should have a certain effect.

First of all, we have to look at what kind of worm it is, so that we can prescribe the right medicine, the following are some worms that often appear in corn, I hope it can help you.

1. Corn borer.

Corn borer, commonly known as corn borer, is one of the main pests of corn. Spraying Bacillus thuringiensis preparations at the end of corn heart leaves can control corn borer, if sprayed with thiamethoxam, chlorantraniliprole and other pesticides and emamectin salt, it can not only improve the control effect of corn borer, but also control aphids, leaf mites and other pests. In the large bell mouth stage of corn, it can be mixed according to the ratio of phosphine granules plus fine sand 2 per mu, and then sprinkle 2-3g in the large mouth of each plant to control corn borer.

2. Aphids. Aphids not only damage the heart leaves at the seedling stage of maize, the panicle part after heading, and affect pollen at the flowering stage, but also can transmit corn dwarf mosaic virus disease, thereby threatening maize yield. Spraying 3% Tianda acetamiprid 1500 times, imidacloprid, acetamiprid and other pesticides on corn plants can control aphids.

3. Armyworms. Armyworms, commonly known as colorful insects, especially like corn leaves, are one of the main pests of corn seedlings. When the armyworm infestation is serious, the leaves can be eaten up, leaving only the corn stalks, resulting in a bad harvest. Spraying 2000-2500 times of cyhalothrin solution or 1000-2000 times of 20 fenozide suspension on corn plants can effectively control corn armyworm.

Fourth, grubs. Grubs are commonly known as white soil silkworms and walnut insects, and the adults are all kinds of beetles, which are the most serious underground pests that harm corn. Grubs not only like to eat freshly sown seeds, but also bite off the corn taproot, which causes the lack of seedlings to break in severe cases. On the one hand, 3-4 kg of chlorpyrifos per mu can be used for control during land preparation, and on the other hand, insect pests can be controlled by applying insecticides such as trichlorfon and phosphine.

Fifth, the ground tiger.

The larvae of the ground tiger are commonly known as rootworms, and their larvae often bite off the base of corn seedlings near the ground, and it is also one of the underground insect pests that seriously harm corn. The diluted trichlorfon is easy to mix on the chopped gray cabbage, and sprinkle it evenly near the roots of corn seedlings in the evening, which can effectively control the ground tiger larvae before the third instar, and the elderly ground tiger larvae need to be controlled with phosphine emulsifiable concentrate.

The demand for sweet corn in China is growing, so many growers are also choosing to grow sweet corn. So in the process of sweet corn planting, how to control pests at the seedling stage?

How to plant sweet corn to control pests and diseases, to achieve high yield caterpillar is a sweet corn seedling stage of the main pest, the main damage to the sweet corn leaves, and even lead to a serious lack of seedlings to increase bite, there are two options to solve, on the one hand, the main manual control, in the morning when the insects are captured, this method is very troublesome, the second aspect is to use poison bait trapping, 50 grams can be used 90% of the crystals between an acre of land, dissolve 250 ml of liquid and fry peanut butter in warm water, stir well, sprinkle around the corn at night.

The big borer mainly harms the heart of corn leaves, affects photosynthesis, affects growth, and reduces the pollination rate, which can be detected at the mouth of corn horns, and can use 3% Miller granules, 2 catties per mu or 50 grams of 98% Bataan wetting powder, or use 150 grams of 90% trichlorfon crystals dissolved in warm water and mixed with fine sand, sprinkled on a core of corn leaves. Corn aphids mainly affect gum powder and are small in size and reproduce quickly. We can spray them with 2500 times more imidacloprid or 1500 times more urine worms.

Dry sheath disease is a serious disease of sweet corn. First of all, at the milky stage, the 1-2 leaf sheaths on the ground mainly damage the leaf cover. Organic fertilizer can be applied, nitrogen fertilizer should not be applied, nitrogen fertilizer should be applied, nitrogen fertilizer should pay attention to drainage.

Alternatively, spray 3,000 times of 25% pipralar, 600 times of 70% methyl topzine wettable powder, or 500 times of 40% cotannin suspension.

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These pesticides are, Bordeaux liquid, anti-aphid, difenoconazole, thiamethoxam, and you can also use some potassium fertilizer or use some chemical fertilizers, these pesticides can eliminate aphid damage.

Low-purity pesticides, medium-purity pesticides, high-purity pesticides, pesticides for pesticide dressing, and pesticides for insecticides. These types of pesticides are able to eliminate the harm of corn aphids.

Acetamiprid, imidacloprid, thiamethoxam, dimethoxam, pymetrozine, thiamcloprid, dinotefuran, etc., these pesticides can be used interchangeably, the cost is relatively low, and the effect is good.

High-efficiency cypermethrin EC, Compendoxin, Emilone, imidacloprid, cyfluthrin, these are all OK.