What are the common pests and diseases of purple potato? How to do a good job in the prevention and

Purple sweet potato is very popular with the public, the color is good-looking, and it is relatively easy to plant, but purple sweet potato also has some more common pests and diseases, so we must do a good job of prevention and control, which is also a very important food crop, with a wide planting area and high nutritional value.

It is more common that in the seedling period of purple potato, it may be infected with black spot disease, which will make the root of the stem of purple sweet potato have brown spots, and it will slowly turn into oval black spots, and then the whole seedling will slowly turn black, which is very difficult to survive. If you want to prevent this disease, you must choose a variety that is relatively resistant to disease and suitable for planting, and before that, you must use some drugs to soak the seedlings first to improve the ability to resist disease.

Root rot is also very easy to appear, when it appears, it will show growth, very slow, and brown lesions will also appear at the tip of the virtual root, after this disease, the emergence time of purple potatoes will become very late, and when this is serious, the roots will slowly rot, so that the purple potatoes will become deformed, and even crack.

At this time, the seedlings cultivated are very important, and field management is also very needed, in terms of medication to achieve uniform efficacy, you can buy some professional prevention and control of root rot agents, and then spray to achieve the prevention and control effect.

The appearance of soft rot will make the purple potato pieces appear spotted, and the whole purple potato will become rotten, this disease will generally appear in a high temperature and particularly humid environment, so when harvesting, it must be carefully stored to reduce epidermal damage, and to prevent water accumulation in the field.

In addition to these diseases, the most common insect pest is the nematode, this kind of city will let the purple potato tuber of these flesh to be eaten away, and the ready-made reproductive ability is particularly strong, but also produce excrement, when the number reaches a certain level, it is likely to lead to bacteria, so that the purple potato is infected with other diseases, so when the nematode appears, it must be eliminated with drugs in time.

Nematode disease, black spot, soft rot, root rot, spot disease, these are all very easy to occur. It is necessary to choose excellent varieties for planting, and at the same time, it is necessary to prevent pests and diseases in advance, spray pesticides, and pay attention to the rational use of fertilizers.

Common pests and diseases include soft rot, root rot, weevils and black spot; After soaking the seedlings planted to improve the disease resistance of purple potatoes, it is necessary to strengthen field management and use professional pesticides for spraying and control, and must be evenly used.

After purple potato seedlings are infected with black spot disease, the base of the stem will produce fusiform brown spots, which will gradually develop into oval black spots and depressions, and all the seedlings will turn black in the later stage, which will be difficult to survive, and the root will have black spot disease, which will gradually expand and develop, and finally lose its edibility.

Control methods: the implementation of crop rotation, and the selection of disease-resistant varieties, planted seedlings, with 50 Tobujin wettable powder mixed with water 500 times of the liquid soaking, after soaking, can easily improve the disease resistance of purple potato.

1. Black spot disease: When preventing and controlling sweet potato diseases, it is necessary to choose varieties with good disease resistance for planting. 2. Root rot:

Watering carbendazim or chlorothalonil to the roots of the seedlings to eliminate the germs. 3. Sweet potato jumping blind bug: spray trichlorfon every 10 days, 2 times in a row.

4. Sweet potato moth: Place insect trap lamps on the sweet potato field to trap and kill insects.

1. Black spot disease

The common disease of sweet potato is black spot, black spot will cause fusiform brown spots on the leaves of seedlings, and later will cause all the leaves of the plant to turn black, when controlling sweet potato diseases, it is necessary to choose disease-resistant varieties, which can prevent the disease from the root, and apply sulfur powder to the tuber for disinfection.

2. Root rot:

In the early stage of sweet potato root rot infection, the leaves will become light yellow, and the tubers will rot and blacken in the later stage, resulting in a decrease in yield.

3. Sweet potato jumping blind bugs

Sweet potato jumping blind bug mainly sucks the sap in the leaves of the plant for food, in severe cases, it will lead to small brown spots on the stems and leaves, when controlling the sweet potato jumping blind bug, it is necessary to release parasitic wasps around the field, so that parasitic wasps can catch pests, and to spray trichlorfon every 10 days, you can spray 2 times in a row.

4. Sweet potato moth

The larvae of the sweet potato moth will burrow into the young leaves to eat, and spin the silk inside, which will cause the young leaves to die in serious cases.

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 mothYou 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.

Sweet potatoes are susceptible to underground pests, forming insect paths, making sweet potatoes rot, reducing quality, and strictly enforcing Gongguang flail to contain lotus when it is heavy, resulting in reduced yield and loss of harvest. In production, the following methods can be taken in time to prevent poisoning and improve the yield and quality. 1.

During the rapid expansion of sweet potatoes, the roots are drenched once every 10 15 days with 25 30 times superphosphate mixed with dry and pure plant ash to leach the clarifying solution. Or 15 20 times tobacco leaf leaching clarifier, etc., 2 3 times in a row, each time about 5 6 kg per square meter of soil is appropriate. Or the root is drenched with 40 50 times tea bran aqueous solution, every 7 10 days, 2 3 times in a row, each time 10 15 kg per square meter.

2.During the growth and development of sweet potatoes, spray 1000 times Lesben aqueous solution on the foliar surface every 10 15 days, evenly spray all the leaves, and spray 3 5 times continuously to start with water droplets flowing down the stems and leaves to the roots.