Nematodes are un-segmented worms that have elongated rounded body which is pointed at both ends. These nematodes feed on the plant roots. These nematodes then inhibit the plant from taking up nutrients and water and thus ultimately lead to the death of the plant.
Once your plant get infected with nematodes then it will be difficult to remove them. If you transfer the plant to another place then it only leads to the spreading of nematode to that area. Nematodes may also spread through infected tools and irrigation water. Here are some steps that may help you to avoid the nematodes.
Tips to Control Nematodes
Fumigation of the soil is the best practice to avoid nematodes. Fumigating the soil with vapam containing products is found to be beneficial.
For removing the nematodes from the infected soil you need to do fallowing which is the practice of leaving the land idle. If you leave the land with out planting for about one year then it may help you to reduce the nematode population.
Cover the infected soil with dark colored plastic sheet. This has to be done in late spring or in early summer. Leave this covering for about six weeks and this will increase the temperature of the soil. The eggs of nematodes and adults can’t live in the soil if the temperature rises above 125 degree F for more than 30 minutes. Remove the covering when the fall season begins so that the soil can breathe.
French marigolds are called nematode suppressive plant and hence planting French marigold near the affected soil will help you to reduce the population of nematode in the soil.
If any of your plant is infected with nematode then remove that plant from the site and destroy it, otherwise it will spread the nematodes to other areas too. Lack of water is a major factor that makes the plant nematode susceptible. Also add manure, compost and peat to the soil to make the damage caused by nematode insignificant.