Some science behind the scenes
Nematicide
A nematicide is a type of chemical pesticide used to kill plant-parasitic nematodes.
Artificial Nematicides - have tended to be broad-spectrum toxicants possessing high volatility or other properties promoting migration through the soil. Human health safety and environmental concerns have resulted in the widespread deregistration of several nematicides. Prior to 1985, the persistent halocarbon DBCP was a widely used nematicide and soil fumigant. However, it was banned from use after being linked to sterility among male workers.
Natural nematicides - An environmentally benign garlic-derived polysulfide product is approved for use in the European Union (under Annex 1 of 91/414) and the UK as a nematicide. Another common natural nematicide is obtained from neem cake, the residue obtained after cold-pressing the fruit and kernels of the neem tree. Known by several names in the world, the tree was first cultivated in India in ancient times and is now widely distributed throughout the world. The root exudate of marigold (Tagetes) is also found to have nematicidal action. Nematophagous fungi, a type of carnivorous fungi, can be used as a nematode, Paecilomyces being one example.
See also the Alan Woods Compendium of pesticides
Observations
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