Rot-knot Nematodes

Class: Nematodes

Common Name

Rot-knot Nematodes

Scientific name

Specie of the genus Meloidogyne

Potential Hosts

Thousands of different plants species for farming and gardening, including field crops, vegetables, herbs, grasses, and ornamental plants.

Who am I?

Rot-knot nematodes are microscopic worms and are an obligatory parasite (organism that relies on its host for reproduction). These worms live in the soil and can severely damage plant roots.

As infestations progress, galls will gradually form along the roots of infected plants. Typical symptoms are chlorosis of new foliage, impaired growth, and reduction in yields.

Control measures

Cultural

First and foremost, prevent the spread of nematodes from contaminated land plots to other regions by strictly prohibiting the transfer of any agricultural ground processing tools that came in contact with the soil in contaminated fields. Properly disinfect all tools that came in contact with infected soil with bleach or alcohol before using them in uncontaminated fields.

Organic

Bacillus firmus

Conventional (chemical)

Successfully managing rot-knot nematodes requires fumigating with specific chemicals. Fumigation will take place prior to planting and in between seasons. Depending on the specific product, implementation can take place before or after a soil disinfection, or as part of a standard soil disinfection application involving the use of metam - sodium.

Work in accordance with the product label and keep in mind that some products can only be used by trained professionals. The following are generic names for nematicides products: 1,3-dichloropropene, Dimethyl disulfide (DMDS), and Fluensulfone.

In addition to the above, there are several products designed for use during the growth season. In cases where the duration of the growing season takes most of the year, additional nematodes suppression may be needed. The following are generic names for such products: Oxamyl, cadusafos, Fenamiphos, and abamectin (only specific product designed especially to combat nematodes).

Caution and careful notice should be taken when using any plant protection products (insecticides, fungicides and Herbicides). It is the grower’s sole responsibility to keep track after the legal uses and permissions with respect to the laws in their country and destination markets. Always read the Instructions written on the label and in any case of contradiction work with accordance to the product label. Keep in mind that information written on the label usually apply only to local markets. Pests control products intended for organic farming are generally considered to be less effective in comparison to conventional product. And so one must keep in mind that when dealing with organic, biologic and, to some extent, small number of conventional chemical products, a complete eradication of a pest or a disease will often require several iterations of a specific treatment or combination of treatments.

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