What are the characteristics of peanut root knot nematode disease? How can it be prevented?

It will cause some problems in the roots of peanuts, will form irregular root knots, will affect the development of young shoots, will affect yields, and will also cause some diseases in peanuts. Some pesticides can be used to exterminate them, so that they can be prevented.

It can damage the roots of peanuts and cause the roots to form clumps. It will cause yellowing of the leaves, which will lead to the dwarfing of the plant and will not bear fruit. It is necessary to use well-rotted organic fertilizer, and it is also necessary to carry out crop rotation reasonably.

The transmission route of peanut root-knot nematode disease generally has the following aspects:

1.Soil transmission: Since root-knot nematodes can overwinter on diseased roots in the soil, they can be transmitted in the soil, for example, some peanut roots are normal, and through a certain period of transmission, normal nematode disease can also occur.

2.Current-spreading: Current-spreading, which can also be carried by nematodes in the event of rainfall or human irrigation, is also common.

3.Spread of agricultural activities: Harvesting, ploughing, etc., all have the potential to bring nematodes from other locations into the field. There is also land that is not rich in nutrients, sandy soil, and dry weather is also possible.

4.Soil fertilizer spread: Peanut harvest soil or leaf litter is buried with diseased soil. It is possible for nematodes to infiltrate into the field and then pass on to the field with the farmer's manure.

5.Weed spreading: If a weed that has been invaded by nematodes is planted with peanuts, it is very easy to spread from weeds to peanuts.

Practical Prevention Key Points:

1.Seeds: Prevention starts from the time of purchasing seeds, and if you buy seeds from agricultural stores, it is recommended to buy varieties that are resistant to insects and diseases, and do a good job of prevention from the source.

2.Field management: Use farmhouse organic fertilizer as much as possible to reduce the need for chemical fertilizer.

At the same time, we should pay attention to eliminating weeds in the fields and maintaining the cleanliness of the countryside. It is also necessary to ensure that the disabled body in the disease plot is immediately removed. Dried in situ and burned intensively.

Then he was taken out of the field.

3.Crop rotation stubble: It is observed that for many years, the long-term planting of peanut plots, the situation of root-knot nematode disease is more serious, and the damage is also large, therefore, crop rotation stubble planting, on the one hand, has the effect of prevention, in addition, on the other hand, if the plot of nematode disease has been very serious, after more than 3 years of crop rotation stubble planting, nematode disease will be alleviated a lot.

4.Pesticide control: In the case of peanut sowing, add an appropriate amount of sand and soil with root nematode medicine and stir evenly. Sprinkle in the sowing furrow. Special care must be taken that the agent must not come into direct contact with the seeds.

It can be spread through the soil, through the flow of water, through fertilizer, through weeds, and some farm tools will also carry it for transmission.

Generally, it will be spread by seeds or soil, it will also be spread by flood irrigation, and it will also be spread through agricultural tools, such as machinery, and it must be done a good job to prevent the spread of diseases and ensure the fertility of the soil.

Soil transmission, agricultural activities, soil and fertilizer transmission, water flow transmission, weed transmission, these are all possible infections.

Answer]: The transmission route of peanut root-knot nematode disease. Infected plots:

Soil with nematodes can be carried by people, animals, and agricultural tools, and spread in the fields destroyed by brigades. Soil manure: Using the crushed soil and fallen leaves brought by the peanut harvest or the soil gasket of the diseased plot, the nematodes may be mixed into the manure and then passed on to the field with the manure.

Running water: In summer, the rain is noisy, and the nematode can be widely spread with the washing of running water. Weed:

Peanut root nematodes can infect and damage a variety of weeds, parasitic weeds are the natural reservoir of pathogenic nematodes, if peanuts are planted in the area of the infested weeds, the nematodes can easily be transmitted from weeds to peanuts.

The prevention and control of peanut root-knot nematode should adopt a comprehensive control method combining pesticide control and agricultural measures. Crop rotation and crop rotation for more than 2 to 3 years with peanuts and corn, wheat, millet and other grasses. It can significantly reduce the density of nematodes in the soil and reduce the damage.

Deep ploughing and soil modification: Deep soil ploughing can change the distribution of nematodes in different soil layers in the soil, especially reducing the density of nematodes in the 10 20cm soil layer. Reducing sources of transmission:

There is no need to collect manure from diseased soil, and wild hosts are removed from the field. Dig drainage ditches in the field to prevent nematodes from spreading over long distances after heavy rain. After the peanut is harvested, the roots of the diseased plant are deeply cut up and fully dried, which can kill the nematodes in the gall and reduce the density of the worm population in the soil.

Pesticide control: When sowing peanuts, use 5% Shennongdan granules or 5% stem thread spirit granules, 25 30kg per mu with water, combined with sowing and applied to the sowing ditch or hole, and then cover and sow the seeds.

Peanut root-knot nematode disease is a devastating disease of peanut, which is widely distributed and harmful. Prevention and control is very important, and the general prevention and control methods are: strict quarantine of old peanut areas; clean up the countryside and eliminate the source of the disease; rational crop rotation; strengthening field management; Biocontrol; The focus is on biological control, which is through the microbial preparation Penicillium lavender, and I will introduce how to use it

1. After dressing seeds according to 1% of the seed amount, they can be sown by covering for 2-3 hours and drying in the shade. 2. Treat the seedbed Mix the Lebeifeng brand lavender penicillium agent with an appropriate amount of substrate and sprinkle it into the seedbed, sow and cover the soil. 1 kg of microbial agent treats 30-40 square seedbeds.

3. Treat the seedling substrate Evenly mix 1 kg of fungus agent into 2-3 square substrates and load it into a seedling container. 4. Hole application near the root system of seeds or seedlings, with a dosage of kilograms per mu. Hope it helps.

Answer: Peanut root-knot nematode control method 1, crop rotation & clean rotation with non-host crops or poor host crops for 2-3 years; Clean the garden, dig deep diseased roots, concentrate burning, increase fertilizer and soil, increase the application of rotting organic fertilizer 2, strengthen field management to eradicate weeds, seriously diseased fields can be changed to summer sowing, build drainage ditches, avoid string irrigation, and prevent the spread of water flow; Strengthen quarantine, protect disease-free areas, and strictly prohibit the transfer or introduction of seeds from diseased areas. 3. Biological control of Penicillium lavender and Verticillium pachysporum can obviously play a role in reducing the nematode population and dissolving its eggs, and the use of thread warping with it as the main component can play a role in killing insects and killing threads.

Thank you for your question.

Prevention and control methods of peanut root-knot nematode disease: (1) Do a good job of quarantine.

Do not transfer seeds from diseased areas, and establish breeding bases in disease-free areas. It is forbidden when the water content of peanut pods exceeds 8% at the time of replanting.

2) Agricultural control.

The implementation of 2 to 3 years rotation of gramineous crops and peanuts, the application of organic fertilizer, and the improvement of soil can reduce the damage of nematodes.

3) Pharmaceutical prevention and control.

In the mildly diseased area with a susceptibility index of peanut roots 20 25, the seed coating agent No. 4 was used to mix seeds with 2% of seed weight, or 3% carbofuran 667 m2 with 5 kg, or 3% methyl isosulfonate 667 m2 with 10 kg of soil; Moderately indicative areas and plots with a disease index of 50 60 were alternately used to treat the soil with agents with high virulence against nematodes, 667 m2 with 1 kg of 15% iron, or 2 kg of 10% gram of nematode, or kilogram of Yishuibao granules (30 days before sowing, do not delay); Severely ill plots with a disease index of about 90 are rotated, or 667 m2 are treated with 15% iron gram kilograms, or gram phosphorus kilograms. The above agents need to be mixed with 15 20 kg of fine soil and sprinkled into the sowing furrow. The ditch is 15 cm deep, and the soil is covered after application, and the seeds are not in direct contact with pesticides.

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He mainly harms the root system of the crop, and a lot of nodules grow on the root system when infected. When the damage is more serious, the plants on the ground will slowly become very slow to develop, and the leaves will become dull and yellow, which will directly affect the yield of the later fruits. There are also some roots that will rot, causing the plant to die, which is really very harmful.

The prevention and control has high temperature prevention and control, and the high temperature stuffy shed will kill all the bacteria and harmful bacteria in the soil.

Chemical control of avermectin has a fast effect, but there are pesticide residues, and it is easy to produce resistance, and the effect is becoming less and less obvious.

Although the effect of biological control and control line is not as fast as chemical control, there is no pesticide residue.