What are the effective control measures for planting sweet potatoes when encountering pests and dise

Sweet potato virus disease causes the surface of sweet potatoes to crack and blacken, losing their commercial value.

Viral diseases. The occurrence of sweet potato virus disease is aggravating year by year, especially in the main sweet potato producing areas, with large planting area, wide range of virus transmission, many virus transmission vectors, and poisonous seed potato seedlings are common in the field.

In the prevention and control of virus diseases, the commonly used methods are as follows: the selection of detoxified seedlings, crop rotation, robust cultivation, pesticide control, etc., in production practice, the effect of all ** virus diseases is very poor, therefore, sweet potato virus disease is focused on prevention, the best way is to choose detoxified seed potato seedlings, the performance is very outstanding that year, the yield increase is large, the shape of the tuber is correct, the appearance is smooth, and the color is pure.

<> soft rot. Sweet potato soft rot mainly occurs in the storage period, which is characterized by fast onset, large range of mycelium, soft and rotten potato nuggets, strong wine smell, the surface of the diseased part is covered with white and gray-black fili, and the non-diseased part can be eaten normally. The cause of the disease is low temperature frost damage and excessive humidity, the prevention method is timely harvesting, strict prevention of field frost damage, fully drying before entering the cellar, reducing the moisture in the cellar, doing a good job in the temperature and humidity control of the potato cellar, to ensure that the cellar temperature is stored at 12-15 degrees Celsius, and the humidity is controlled at about 80%.

Sweet potato moth. The larvae of sweet potato moth are large and eat a large amount, and the amount of food of mature larvae increases dramatically, and when it occurs, the entire field potato leaves are quickly eaten clean, leaving only potato vines and petioles, resulting in a large reduction in yield. The key to control is the young instar of larvae, and the best agent is avi.

Chlorpyramide is non-toxic and non-residue, and the prevention and control effect is particularly good.

In the prevention and control of sweet potato moth, there are often farmers complaining that the pesticide purchased is fake, and it does not work several times, the main reason is that the control is too late, the insect resistance is enhanced, and the choice of pesticide is not suitable, always think that the more poisonous, the better, and the result is counterproductive.

There are many sweet potato diseases and insect pests, and it is necessary to focus on prevention, combine prevention and treatment, mainly physical control such as crop rotation and seedling detoxification, supplemented by chemical pesticide prevention and control, pay attention to the selection of high-efficiency, low-toxicity and low-residue pesticides, pay attention to the safety interval, strictly prevent pesticide residues, and ensure food safety.

It is possible to put them in a warm room suddenly. Promotes respiration, exothermic healing. If you find stagnant water, drain it in time to reduce sweet potato rot.

1) Choose disease-resistant varieties.

2) Cultivate strong seedlings and plant them early at the right time.

3) Deep soil ploughing and increasing net fertilizer.

4) Crop rotation and stubble.

5) Clean the field and remove the remains of diseased potatoes.

6) Establish disease-free farmland.

Choose disease-resistant varieties and control them from the roots. After harvesting, wood chips are mixed with sulfur and fumigated in the storage cellar on fire. In order to produce sweet potato acetone, inhibit the germination of black spot spores and reduce the occurrence of diseases.

Soaking with 50% multi-step jin wettable powder and 500 times the amount of water before transplanting can effectively prevent and control the occurrence of diseases.

Pesticides can be sprayed because pesticides can kill some pests and make the plants grow better.

Sweet potato black spot disease can be sprayed on the roots of green bag fertilizer strong mildew remover, remove the source of disease in the field, select disease-resistant varieties, crop rotation and stubble, cultivate disease-free potato seedlings, do not apply macro change disease-free manure, strict quarantine system, if there are moths and other insect pests, you can deep irrigation in the village, eliminate the winter moth pupae, and at the same time can use insect trap lamps to trap or use natural enemies to prevent and control, or spray pesticides.

Common diseases in sweet potato cultivation.

1. Sweet potato black spot disease:It is also known as black scarring, which mainly harms potato seedlings and tubers, and the base of seedling stems, especially in the white part of the diseased spots, black-brown, and slightly concave.

2. Sweet potato stem nematode disease:It is also called chaff heart disease, chrysanthemum heart, bran bang, hollow heart disease, etc., the surface is normal or some black, and the inside is brown and white into chaff heart.

3. Sweet potato root rot:It is also called root rot disease, the root tip is black, slowly expands upward, the seedlings are short, the leaves turn yellow, fall off from the bottom up, and die of severe dryness.

Cultivated sweet potatoes are the main insect pests.

Sweet potato moth:Concentrated in the young leaves of sweet potatoes that have not yet been cleared, they will also spin silk in them and turn them into small leaf buds, which will harm the growth of leaves, and may cause the young leaves to die.

Sweet potato pest control.

1. Sweet potato black spot disease:You can spray green bag fertilizer strong mold remover on the roots, pay attention to the need to avoid rainy weather, so rainy days may cause the product to be diluted twice, it is difficult to achieve the desired effect.

2. Sweet potato stem nematode disease:Eliminate the source of disease in the field, select disease-resistant varieties, rotate crop stubble, cultivate disease-free potato seedlings, do not apply disease-free manure, and strictly quarantine the system.

3. Sweet potato root rot:Select disease-resistant seeds, cultivate strong seedlings, plant early in a timely manner, deeply turn over the soil, increase net fertilizer, and rotate crops.

4. Sweet potato moth:You can irrigate deep water in the village to eliminate the moth pupae in winter, and at the same time, you can use insect traps or natural enemies to prevent and control, and you can also use pesticides to prevent and control.

In the process of sweet potato planting, common diseases include black spot, root rot, potato blast, etc. It is necessary to breed good varieties and pay attention to the management of the growing season to prevent diseases.

The larval grubs of the beetle gnaw off the roots and stems of the ground, causing the seedlings to wither. Needleworm bites fetal buds, young roots, and tubers, causing bare root seedlings to wither or tubers to rot. Mole crickets, bite the roots of the tubers into a mess, so that the bare root seedlings wither.

The larvae of ground tigers like to gnaw off sweet potato stems, resulting in dead seedlings and lack of seedlings. In addition, there are more than a dozen underground pests such as root bugs, root aphids, root scales, root beetles, white ants, etc., which have great damage to sweet potatoes. Sweet potato pest control:

1. Clean and sterilize the soil with quicklime. 2. Organic chemical control. 3. Prevention and control of agriculture and animal husbandry.

The larva grubs of the beetle eat the roots and stems of the ground, causing the seedlings to wither. Needleworm bites germs, young roots, and tubers, causing roots and seedlings to wither or the tubers to rot. Where conditions permit, water-drought rotation can be used to eliminate insect sources in the soil, improve soil moisture content, and inhibit the reproduction of pests.

Apply well-rotted organic fertilizer and mix trichlorfon powder insecticide to cut the transmission route of eggs.

Dear, hello, sweet potato pest control technology is as follows: 1. Quicklime disinfection * soil. After harvesting sweet potatoes in autumn, more than 1,000 kilograms of straw and straw are spread on each acre*, sprinkled with 50 to 100 kilograms of quicklime, and then deep ploughing is carried out to bury the quicklime into the ground, because quicklime can heat up when it encounters water, kill underground pests, and can also make straw and straw rot and turn into organic fertilizer.

What are the pests of sweet potatoes? How can it be prevented? 2. Before chemical control and land preparation, 5% of the phosphine particles can be evenly sprinkled on the ground, and then the shallow hoe is turned, and the agent is fully mixed in the soil, which can kill underground pests, and the use of 50% phosphine EC, 90% crystal trichlorfon 800 times, 50% phosphine EC 500 times can also be prevented, but it is not recommended to use pesticides at high concentrations, and the pollution is very serious.

3. Where there are conditions for agricultural control, water and drought rotation can be used to eliminate the insect source in the soil, improve the moisture content of the soil, and inhibit the reproduction of pests. Apply well-rotted organic fertilizer and mix with trichlorfon powder insecticide, cut into sections and prepare the transmission route of the insect egg culture. The above is all about the introduction of sweet potato pest control, if farmers want to plant sweet potatoes with high yield, pest control must be done carefully to avoid a large number of pests affecting sweet potato yield.

It is necessary to observe whether there is any lesion on the appearance of sweet potatoes, spray pesticides in time, clean up weeds frequently, keep the nutrients of the soil from being lost, and do a good job in water and fertilizer management.

It is necessary to spray drugs in advance, do a good job in epidemic prevention, rotate crops with rice, and also choose better sweet potato seeds.

It is necessary to strictly quarantine the rice, carry out rice rotation, select some fine varieties, and remove some remnants from the fields.

Common pests in sweet potato fields generally have mole crickets, grubs, needleworms, root maggots, ground tigers and other underground pests, from the seedling stage, until the sweet potato harvest period, will face the harm of underground pests, either will cause lack of seedlings and broken ridges, or will harm the underground roots, if the pests and diseases are not stopped, will cause the quality of sweet potatoes to be greatly reduced, and the yield is even greatly reduced, because the resistance of underground pests is increasing year by year, and even the pesticides used before, now do not increase the dosage, are not ideal for the control effect of pests. So, how to quickly kill sweet potato underground pests?

After plowing the land in the sweet potato field, before planting sweet potatoes, you can use cornmeal, soybean cake powder, put it in the pot to fry the fragrance, and then mix it with 100 times of the liquid of phosphine acetamiprid, after stirring, evenly sprinkle on the road surface at dusk when there is a hat in the rainy mountain, the underground pests smell the fragrance, they will come out to feed, as long as they eat the insect pests of the poisonous bait, they will die and whimper. This method is very effective before planting sweet potatoes and can greatly reduce the total number of underground pests.

200 times of thiamfenoxam + 200 times of chlorantraniliprole, mix the bait, spread it evenly, carry out stirring with a micro-cultivator, and then plant sweet potatoes, which can prevent and control most of the insect pests during the overall growth period of sweet potatoes, and chlorantraniliprole 1000 times liquid + thiamethoxam 1000 times liquid, after mixing and symmetry, spray sweet potato seedlings evenly, and the drug will be transmitted to the whole plant along the leaves, and there will be a certain control effect on insect pests such as beetle larvae grubs, ground tigers, and small ground tigers hidden in the ground.

You can use 500 times of thiamethoxam + 1000 times of deltamethrin to spray evenly when the soil is subsoiled, which can control a variety of underground pests, and the effective period is still very long.

Li Laohu is a very cunning underground pest, hiding in the soil during the day, only to drill out at night to gnaw a part of the ground, often close to the ground above two or three centimeters of the area, the plant gnawed off, resulting in the occurrence of dead seedlings and broken ridges, at this time the rapeseed cake can be fried out of the fragrance and ground and reserved, the crystallized trichlorfon is melted with warm boiled water, with 500 times the liquid, and the rapeseed cake that is fried out of the fragrance is stirred, in the dusk, evenly sprinkled in the periphery of the sweet potato seedlings, as long as the tiger smells the smell, it will go out to take it at night, It has the effect of exterminating ground tigers.

Take 5 kg of the waste solution of pickled sweet, garlic and vinegar, add 200 grams of crystalline trichlorfon to dissolve, and place the insect control solution in a small basin. At dusk, placed in the chest-high area of the field, the ground tiger nymphs will fly up when they smell the smell at night, and they can spray some ground tiger nymphs.

When underground pests are more rampant, use irrigation water to irrigate, and apply matrine aqueous agent along the water, 700 1000 ml per mu, which can effectively control most of the sweet potato underground pests. The above 6 points should be comprehensively applied and flexibly mastered, which is very effective in preventing underground pests in sweet potato fields.

Physical control methods can be used, chemical control methods can also be used, some pesticides can be used, and sweet potatoes can also be irrigated.

If you want to effectively control underground pests of sweet potatoes, you must do a good job of pest control in advance, spray some relevant pesticides appropriately, and also properly control weeds.

For the treatment of these underground pests, physical control methods can be used. This method is generally started in early spring, mainly for the eggs in the soil, every year at the beginning of winter, the soil should be deeply cultivated, the eggs can be turned out, and it will be frozen to death at a low temperature. For the pests brought by farm fertilizer, high temperature insecticidal eggs can be used, and the rotting treatment of farm fertilizer must be in place before fertilization.

1. The organic fertilizer is fully decomposed to eliminate pests.

Farmers must be fully decomposed according to the requirements when decomposing organic manure, and only after high temperature treatment can the eggs and germs in the manure be killed together, so as to reduce the pests and diseases caused by organic fertilizer. Organic fertilizer can also cause phenomenon such as seedling burning if it is not fully decomposed, which is not conducive to the growth of crops.

2. Chemical control methods.

Chemical control methods are mainly divided into soil disinfection, seed dressing, root irrigation and other methods.

First of all, you can turn the soil deeply, and then rotate the operation to manage the growth and development period of sweet potatoes, and usually apply fertilizer and watering reasonably, so that you can control underground pests.

When planting, the soil needs to be disinfected and sterilized first, and then the soil is cultivated, so as to prevent some underground pests.