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Nematodes

Photo by Vitalii Odobesku: https://www.pexels.com/photo/blooming-orange-marigolds-growing-in-nature-in-daylight-5651864/

You’re right about “stink afrikanertjies”—they are indeed a type of marigold, specifically the African marigold (Tagetes erecta). These plants are well known for their pungent aroma and are used in organic farming as a natural pest deterrent, including against nematodes. The method you described, using marigolds around vegetable beds and creating a “Jauche,” is a traditional and effective approach in integrated pest management. Let’s delve into how each part of this method helps combat pests and nematodes:

1. Planting Marigolds:
Marigolds are reputed to have biofumigant properties due to compounds they release, which are toxic to nematodes and other pests. By planting marigolds around your vegetable beds, you introduce these natural nematicidal agents into the soil. When marigold roots grow, they release these compounds, which help reduce the population of nematodes by either repelling them or inhibiting their reproduction.

2. Creating and Using Jauche (Marigold Tea):
“Jauche” refers to a liquid manure or plant ferment made from steeping plants in water. When made with marigolds, this concoction can be used as a foliar spray or soil drench. Here’s how you can make and use it:

  • Making Marigold Jauche:
    • Chop fresh or dried marigold plants into small pieces to increase their surface area.
    • Place these chopped pieces in a bucket or large container and cover them with water (preferably rainwater or non-chlorinated water).
    • Allow the mixture to ferment for about a week to two weeks, stirring daily. The mixture will start to ferment and break down, releasing beneficial compounds into the water.
    • After fermentation, strain out the plant material, and the remaining liquid is your marigold Jauche.
  • Using Marigold Jauche:
    • Dilute the Jauche with water, typically at a ratio of about 1 part Jauche to 10 parts water, though this can vary based on the strength of the original mixture.
    • Use this diluted mixture as a foliar spray on cucumbers, tomatoes, cabbages, and other susceptible plants. It can help deter pests like aphids, whiteflies, and even some fungal diseases due to its antifungal properties.

This method is particularly valued in organic farming because it avoids synthetic chemicals and leverages natural plant properties to manage pests and improve plant health. Using marigolds and their derivatives can be a holistic part of garden and farm pest management, contributing not only to pest control but also to the aesthetic and biodiversity of the garden environment.

Cabbage leaves:

Cabbage leaves dug into soil will eradicate nematodes.

Worthwhile videos:

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