What are root-knot nematodes most afraid of? What is the easiest and most thorough way to treat root-knot nematodes?

Root-knot nematode damage

Root-knot nematodes, commonly known as root nodules , are a type of obligate biotrophic parasite. They have a wide range of hosts and are one of the most serious diseases in agricultural production. Root-knot nematodes are most harmful to a variety of vegetable crops such as cucumbers, watermelons, melons, tomatoes, peppers, and eggplants .

Plant root-knot nematode disease is a widespread disease worldwide. Most food and cash crops can be infected, and the yield is generally reduced by 20%-30% or even completely eliminated after infection. However, poplars are most afraid of root- knot nematodes, which are generally not infected by them.

Root nematode pictures

What pesticide is good for killing root-knot nematodes?

Thiazole is definitely the nemesis of root-knot nematodes . Some traditional nematode control agents, such as cypermethrin and aldicarb, have been banned due to toxicity and residue issues. This has allowed the highly effective and low-toxic thiazole to gain a firm foothold.

Thiazophos is an organophosphorus insecticide. Its effectiveness in controlling root-knot nematodes is mainly reflected in its contact killing effect and systemic effect.

On the one hand, it can directly kill the root-knot nematodes in the soil it comes into contact with. On the other hand, it can be absorbed by the roots of plants and kill the nematodes that have already formed nodules in the roots!

How to use thiazolyl

The first method is to spread granules before planting for prevention , generally 10% thiazolyl granules 1500-2000g/mu;

The second method is to prevent it by applying fertilizer in holes , but it is recommended to mix it with some organic fertilizer or sand in advance, which is safer;

The third method is to apply with water . After the root-knot nematodes occur, 750-1000ml of thiazolyl suspension of 20% is applied per mu of land for prevention and control, depending on the severity of the occurrence.

Precautions for using thiazophos to treat root-knot nematodes

Scientific use of thiazophos to control root-knot nematodes will show changes in the roots in 5 to 7 days , and the insect control effect is about 30 days ! Although thiazophos's high efficiency in killing nematodes has been recognized by many users, there are also many problems when using thiazophos.

1. Root burn

As we mentioned at the beginning, excessive use will cause root burn and plant death. So here we remind everyone to use it according to the instructions. Generally, the amount used for 20% of the mu should not exceed 1.5 kg. Do not blindly increase the amount of thiazophos, otherwise it will have the opposite effect.

2. Pay attention to root maintenance

When using thiazophos to control root-knot nematodes, attention should be paid to the maintenance of the root system. When the concentration of thiazophos is high, it will inhibit the growth of the root system , and the tenderer the root system, the more sensitive it is.

In addition, the root nodules will be damaged during the process of eliminating nematodes. If the root nourishing ingredients are not used, there is a certain probability that the plant growth will stagnate, wilt, or die.

Therefore, it is generally recommended to use sodium nitrophenolate, brassinolide, amino acid fertilizers , etc. when applying fertilizers to treat nematodes to promote the recovery of the root system!

3. Do not use continuously

Do not use thiazothiazide continuously, as root-knot nematodes are now very resistant to thiazothiazide. In order to prevent root-knot nematodes, some growers have even used 3-5 kg ​​of 10% thiazothiazide granules per acre.

On the one hand, the cost is too high, the effect may not be good, and it may also inhibit growth. It is recommended to use it with avermectin or rotate with avermectin for better results!