
photo credit: Hair Squared
Scientists have recently discovered a new kind of natural pesticide, namely oils from some of the herbs widely used for spices, such as thyme, rosemary, mint etc.
Apparently, the oils from such herbs sprayed onto the garden plants repel insects quite efficiently because they interfere with the insect’s nervous system causing spasms leading to its death. Some herbs disrupt the cellular membranes causing a fatal leakage of essential fluids. The researchers claim these herb oils work best with small soft-bodied insects that suck on plant juices, e.g. spider mites, whiteflies, aphids etc.
Moreover, since the chemical structure of such plant-derived oils is much more complex that that of chemically engineered pesticides, it is more difficult for the insects to develop defense mechanisms against them, thus making plant oils a far more effective pesticide. Not to mention a far safer one both for the consumers and the environment.
Because these herbs are already widely available on the market as flavoring for food and perfume ingredients, it is estimated that these new all-natural pesticides should hit the shelves fairly quickly. There is one flaw, however, the researchers state. The oils evaporate and disintegrate in the sun quite quickly thus need to be reapplied ever few days as opposed to every few weeks for the chemical counterparts.
However, taking into consideration the fact that these herbs are an inexpensive and a natural way of getting rid of these pesky bugs, it should be a win-win situation for the farmers, consumers and, more importantly, the planet.




