Buying clean healthy plants
If you buy clean and healthy plants, you can avoid getting nematodes in your garden. However, if you want to discourage root knot nematodes in your already planted vegetables and other kinds of plants, you should make sure that you clean your garden soil from old roots and debris. You should also mulch your garden soil as it will also help in avoiding these troublesome creatures. Not only just mulching, but overall cleanliness of your garden certainly gives a good outlook of your planted vegetables. Rotation of your crops will also not attract nematodes and other types of worms. You can also grow plants which are not susceptible to nematodes.
Use French marigold
French marigold will work as a guard against nematodes and other types of worms. Research has shown that French marigold not only looks good in the garden but it also prevents nematodes from growing.
Soil sterilization will also help you in avoiding nematodes. There are many types of methods available in the market to sterilize your garden soil. One way of sterilizing soil is to spread black plastic over the bare soil. You can find this at any gardening type store in large quantities.
Remove and replace soil
Removing and replacing the soil is also a very good idea for getting rid of nematodes from your garden. Though many say that most pesticides are highly toxic but now some pesticides guarantee removal of all types of nematodes. Be sure to read the label of the pesticide to see if it is safe for your particular type of garden. Also, visit a nursery and ask someone there for their advice on how to remove nematodes from your plants. They will be in a better position to guide you with all the latest natural techniques that are currently being used.