What are the pests of soybeans? What pesticides to fight soybean pests

There are many insect pests that soybeans are prone to, for example, the most typical is this root rot, also known as root rot. Root rot occurs when there is too much water or the seeds are affected by mold, which is prone to root rot. The occurrence of root rot is often easy to cause a large-scale reduction in soybean yield, which must be focused on prevention and control, in the planting period to carry out a certain disinfection of seeds, and to do a good job of drainage of the planted plots, do not cause large-scale water accumulation.

If the temperature rises suddenly after continuous rain, then root rot is prone to occur, and it is necessary to take corresponding precautions in time for such weather to avoid affecting crops.

Soybean nematode disease is also one of the more common insect pests. Once this insect pest occurs, then the soybean leaves are prone to yellowing, and will grow very slowly, a whole bean seedling flowering will be very delayed, even if the fruit will be very small, if it is a more serious period, then it will die, like a fire scorched. <>

In this case, you can also choose to use some fungicides to spray control, because fungicides can effectively inhibit this kind of insect, of course, when we plant soybeans, we can not plant on a piece of land for a long time, but rotate, which can effectively reduce the occurrence of soybean nematode disease. <>

Soybean gray spot disease mainly affects the leaves, which will affect the growth of soybeans. Leaves play a very important role, one is photosynthesis, the other is to promote flowering and fruiting, once the leaf is harmed, then it will affect its photosynthesis and nutrient absorption. For ileal disease.

Whether it is a seedling, a seed, or a leaf, there will be some semi-circular, or slightly sunken lesions, which are relatively easy to distinguish because those spots are often brown.

Fungicides are also used for the prevention of this disease, such as carbendazim, which can effectively kill this bacteria.

Soybean insect pests mainly include: soybean root loon, two-leaf beetle, soybean moth, soybean heartworm, bean pod borer, soybean aphid, bridge-building insect and so on. These pests are very damaging and can be suppressed by spraying pesticides.

Grubs, underground insect pests, bridge-building insects, soybean root loon flies, mole crickets, two-leaf beetles, and bean pod borers are all harmful to soybean pests.

Soybean pests include: soybean gray spot, soybean carbon koji disease, soybean purple spot, soybean virus disease, soybean root rot, soybean downy mildew, etc.

Eliminate sweeping: use 20% sweep 1000 times liquid to control the ground tiger on soybeans. Tetraacetaldehyde:

After soybeans are attacked by snails, 6% tetraacetaldehyde granules are sprinkled along the ridges near the roots of the crop. Thiamcloprid: Bemisi tabaci can be sprayed with 22% spiro-thiamacloprid suspension.

1. Wipe out the profits

After soybeans cause tiger insect infestation, you can use 20% 1000 times of the liquid to spray in the evening, or use 90% trichlorfon 800 times to spray on the green material to trap and kill, pay attention to wearing gloves and masks when spraying, so as not to splash the agent into the eyes.

2. Tetraacetaldehyde

After soybean is attacked by snails, for plots with high insect density, it is necessary to sprinkle 6% tetraacetaldehyde granules along the ridges near the roots of crops, 300 grams per mu, or spray 22% thiamis perchlorofluorine microcapsule suspension on the plants, 20 ml per mu.

3. Thiamcloprid

Soybean is easy to suffer from whitefly, when the disease in the field is serious, you can choose 22% spiroworm thiamethoprid suspension, 40 ml per mu, in addition, 10-13 grams of 50% sulfoxapyr water dispersible granules can be sprayed per mu to effectively prevent and control whitefly.

4. Precautions

In order to avoid the invasion of pests during soybean growth, it is necessary to coat the seeds before sowing, and the commonly used pesticides are 70% thiamethoxam suspension seed coating and fludioxonil suspension seed coating, which can effectively prevent pests and diseases such as spot bee bugs, seedling aphids and root rot.

The main pests and diseases of soybeans are as follows:

1. Diseases include: soybean gray mold, soybean bacterial spot disease, soybean downy mildew, cataplexy disease, blight, purple spot, gray spot, brown spot, leaf spot, shy wilt, black spot disease, rust, gray star disease, sclerotinia disease, ring disease, charcoal blight, harrow point disease, wilt, sheath blight, pod blight, stem blight, black pox, black spot disease, scab mold, powdery mildew, blight, bacterial spot disease, bacterial horn spot, bacterial spot, mosaic disease, cyst nematode disease, root-knot nematode disease.

2. Insect pests include: alfalfa blind bug, three-spotted blind bug, forage edge bug, spotted whisker bug, spotted peak edge bug, soybean aphid, large green leafhopper Hua A gill beetle, large black gill beetle, dark gilll beetle, black velvet beetle, sand diver, millet scale leaf beetle, Mongolian earth elephant, large gray elephant, two leaf beetles, Chinese bean corian, spotted bean leaf beetle, double spotted fluorescent leaf beetle, bean stalk black loon fly, bean root snake loon, small ground tiger bean roll leaf borer, large bridgeworm, snow lamp moth, kidney poison moth, silver striped armyworm, spodoptera exigua, spodoptera exigua, red brown gray armyworm Spotted bean butterflies, soybean heartworms, bean leaf moths, bean leaf borers, flame leaf moths, blue gray butterflies, bean gray butterflies.

Soybean pest control methods:Prevent in advance, select disease-free and excellent varieties, and carry out soil sterilization and insecticide treatment during land preparationSpraying sterilization and insecticide + 800 times of new high-lipid film before the onset of disease can effectively prevent the occurrence of pests and diseasesIn the occurrence period of pests and diseases, it is necessary to spray targeted agents + 800 times of new high-fat film according to plant protection requirements for killing.

The main pests and diseases of soybean are: soybean root nematode disease, soybean heartworm, soybean aphid and so on.

Soybean root nematode disease: the first noisy foundation beam is selected disease-resistant and disease-resistant varieties;Implement the rotation of fronts and cereal crops. Organic fertilizers are added to the management to promote growth.

Appropriate irrigation of more water, resulting in an anoxic environment, so that the nematode dies, the amount of seeds used for pesticide control Shennongdan seed dressing, can also be used aldicarb, applied into the sowing furrow.

Soybean heartworm: In addition to the selection of disease-resistant varieties and crop rotation and stubble, 5% cypermethrin emulsifiable concentrate can be used for pesticide control.

Soybean aphid: 10% imidacloprid with 10 grams per mu for control.

<> common soybean diseases include gray mold, soybean bacterial spot disease, soybean downy mildew, cataplexy, blight, purple spot, gray spot, brown spot, leaf spot, wilt, black spot, rust, gray star disease, etc.;Common soybean insect pests include alfalfa blind bug, three-spotted blind bug, forage edge bug, spotted whisker bug, spotted peak edge bug, soybean aphid, large green leafhopper, Chinese gilll beetle, large blackgill beetle, dark gill beetle, sand diver, etc.

1. What are the soybean diseases and pests?

1. Common soybean diseases are: rake spot disease, wilt disease, pod blight, pod blight, stem blight, black spot disease, powdery mildew, blight, bacterial spot disease, bacteria, etc.

2. Common insect pests of soybean are: Spotted Leaf Beetle, Spotted Whisker Bug, Spotted Peak Bug, Kidney Poison Moth, Spotted Soybean Powder, etc.

3. It should be noted that blight, root rot, sclerotinia disease, gray spot, mosaic disease, cyst nematode disease and early frost chilling injury are the most difficult to prevent and control for soybeans.

2. Soybean pest control and medication

1. Bean moth.

In the larval stage spraying treatment, you can use 50 octathion emulsion 1000 times liquid or 20 pyrethrin 2000 times solution, 50 kg of medicinal solution per mu for spraying.

2. Bridge-building insects.

You can use 20% pyrethrin EC or deltamethrin EC 2000 times liquid, spray 40 kg per mu.

3. Weevils.

Spray evenly with 1500-2000 times of 50 phoxanthion EC or 20 2000 times of pyrethrin solution, and spray the agent onto the leaves of crops.

<>1. Bean moth: The general larvae are pests, eating leaves and bean plants, affecting the yield. It can be sprayed with 50 phosphine emulsion 1000 times, 20 pyrethrin 2000 times, etc.

2. Bridge-building insects: larvae will harm bean leaves, cause flower drops, and affect yields, so you can use 20% to kill pyrethroid emulsifiable concentrate and other agents, and spray them. 3. Weevils.

To gnaw on the stems and leaves of plants, you can use 1500-2000 times of 50 phosphine emulsifiable concentrate and spray it evenly.

1. Bean moth

1. Bean moth insects, also known as bean insects, larvae will harm soybean leaves, resulting in leaf gaps or holes. When the symptoms are mild, the leaves will be eaten into a mesh shape, and in severe cases, the bean plants will be eaten into a bare rod, resulting in the inability of the plant to set pods and affect the yield.

2. It can be sprayed in the larval stage before the 3rd instar, with 50 phosphine emulsion 1000 times, 20 pyrethrin 2000 times, 20% pyrethrin EC, deltamethrin EC 2000 times liquid isopress, 50 kg of liquid per mu, spray.

2. Bridge-building insects

1. There are many species of bridge-building insects, among which Spodoptera exigua is the main one. The larvae of the bridge-building insect will harm the bean leaves, gnaw on the tender tips, flowers and young pods, and in severe cases, they will eat up the leaves, resulting in flower and pod dropping, and the seeds are not full, which seriously affects the yield.

2. 2000 times of pyrethrin EC and deltamethrin EC can be used to spray 40 kg per mu.

3. Weevils

1. Weevils will bite the stems and leaves of plants, affecting the growth of plants.

2. You can use 1500-2000 times of 50 phoxanthion EC, or 20 2000 times of pyrethrin and spray evenly.

Fourth, heart-eating insects

1. The larvae of heart-eating insects will eat the pods, and the larvae will bury through the seams of the pods, biting the beans into grooves and broken shapes.

2. 10% cypermethrin EC can be used, and 35-45 ml per mu can be used. You can also use dichloride emulsifiable concentrate, grams of active ingredients, mixed with 40 kg of water, and sprayed evenly.

5. Aphids

1. Aphids will begin to be harmful in the soybean seedling stage, they will eat the growth point, young leaves, young stems, and young pods of the plant, which can spread the virus, causing the leaves to shrink, slow down the growth, and reduce the number of pods. When the infestation is severe at the seedling stage, it may cause the whole plant to die.

2. You can use 1500-2000 times of 50 phoxanthion emulsifiable concentrate, or 20 2000 times of pyrethrin can be used, and spray evenly.

6. Root rot

1. Fusarium root rot generally occurs at the seedling stage, and the adult plant is generally able to resist the disease. At the onset of the disease, brown oval, elongated or irregularly shaped lesions will form at the base of the diseased root and stem, with slight depressions.

2. Measures such as timely ploughing, leveling and fine harrowing, reducing water accumulation in the field, and cultivating soil in a timely manner can be taken to improve the soil aeration state, make the root system of plants thrive, cultivate strong seedlings, and enhance plant disease resistance.

3. You can use 35 Duokefu, 50 soybean micro-compound fertilizer No. 1 and 30% Fudofu to treat seeds, which also has a good effect.

First of all, we should choose the right pesticides, be sure to prescribe the right medicine, spray pesticides regularly, remove pests in time, and then we should also keep the light sufficient, keep the temperature appropriate, the temperature should be controlled at about 23, prune some residual branches in time, avoid rotting, and do a good job of drainage and ventilation.

It is necessary to prevent in advance, to use some pesticides, but also to pay attention to the amount of pesticides, and to pay attention to the method of prevention and control.

The main control measures are the use of pesticides, the management of water and fertilizer, and the increase of light time, so that pest control can be controlled.