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Herbicides & Pesticides
Agriculture, Food Chain, Fertilizer, Roundup. Health Effects, Safe Natural Products, Alternatives to Poison

Safe Natural Herbicides for Weed Control

There are a number of natural pesticides available to gardeners for insect control, but relatively few natural herbicides for the eradication of weeds or other invasive plants. What natural herbicides do exist can do more harm than good if applied under the wrong conditions. However, there are plants that act as natural herbicides, such as black walnut, sunflowers, sagebrush and spotted knapweed. These plants excrete chemicals that can kill off another plant species growing nearby. The process of certain plants acting as natural herbicides is called allelopathy.

Researchers are very interested in the allelopathic qualities of plants, since the chemicals responsible for natural herbicides can often be isolated and refined for commercial use. For example, scientists were able to extract an herbicidal chemical called catechin from the roots of spotted knapweed, an invasive weed found in the western United States. This chemical can be synthesized on a larger scale and applied to a number of other invasive plants. Many natural herbicides are selective, which means that their chemicals only kill specific plants, not everything they touch.

Other natural herbicides are used primarily to control weed growth in commercial turf, such as golf courses and installed lawns. These natural herbicides are considered pre-emergent, which means that they destroy other plants at the germination stage, before the plant can establish roots. One such natural herbicide is corn gluten meal. Corn gluten meal was originally developed as a medium for growing fungus, but researchers discovered that it also inhibits the germination of other plants, especially weeds and grasses.

Danger of Pesticides for Humans and Animals

The biggest danger from pesticide exposure is not from the immediate effects, but the harm that comes long after exposure or from repeated, low-dose exposure. Of the 26 most widely used pesticides in the U.S., 12 are classified by the EPA as carcinogens. Americans use approximately 380 million pounds of pesticides per year. (U.S. EPA. 1998. Office of Pesticide Programs, list of chemicals evaluated for carcinogenic potential).

Recent data collected by the EPA reports that in the U.S. approximately 5 billion pounds of active pesticide ingredients are applied annually. These tremendous amounts of poisons entering our environment and our bodies, create great concern among many of us.

A recent University of Washington (2002) study found that 109 out of 110 urban and suburban children had pesticides in their urine samples.

Pets and wildlife are also vulnerable to the harmful effects of pesticides and herbicides. Since pesticides are designed to kill, it is no wonder that beneficial insects are decimated by pesticide use. It makes sense to avoid harmful pesticides in order to preserve the health of beneficial insect populations which control pests naturally.

Food grown on certified organic farms contains significantly less pesticide residue than food grown with synthetic pesticides. That seems obvious, but the evidence for this fact has only been available since 2002, according to Sandra Steingraber, PhD. Research has shown that children fed organic food have lower residues of certain pesticides in their bodies than children fed conventionally grown food.

This site has a great list of websites on pesticides, organic foods and farming, natural lawn care, soil testing etc.

Research of Natural Pesticides from Plants

Natural compounds have increasingly become the focus in the discovery of pesticides.

Tens of thousands of secondary products of plants have been identified and there are estimates that hundreds of thousands of these compounds exist.

There is growing evidence that most of these compounds are involved in the interaction of plants with other species-primarily the defense of the plant from plant pests. Thus, these secondary compounds represent a large reservoir of chemical structures with biological activity. This resource is largely untapped for use as pesticides.

This review will provide an overview of those compounds from plants that have been utilized for pest control, examples of some compounds with pesticidal potential, and a discussion of considerations in development of natural plant compounds for pesticidal use.

Stephen O. Duke


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"You must be the change you wish to see in the world."
(Mohandas Gandhi)

Albert Einstein"When forced to summarize the general theory of relativity in one sentence: Time and space and gravitation have no separate existence from matter. ... Physical objects are not in space, but these objects are spatially extended. In this way the concept 'empty space' loses its meaning. ... The particle can only appear as a limited region in space in which the field strength or the energy density are particularly high. ...
The free, unhampered exchange of ideas and scientific conclusions is necessary for the sound development of science, as it is in all spheres of cultural life. ... We must not conceal from ourselves that no improvement in the present depressing situation is possible without a severe struggle; for the handful of those who are really determined to do something is minute in comparison with the mass of the lukewarm and the misguided. ...
Humanity is going to need a substantially new way of thinking if it is to survive!" (Albert Einstein)

Biography: Geoffrey Haselhurst, Philosopher of Science, Theoretical Physics, Metaphysics, Evolution. Our world is in great trouble due to human behaviour founded on myths and customs that are causing the destruction of Nature and climate change. We can now deduce the most simple science theory of reality - the wave structure of matter in space. By understanding how we and everything around us are interconnected in Space we can then deduce solutions to the fundamental problems of human knowledge in physics, philosophy, metaphysics, theology, education, health, evolution and ecology, politics and society.

This is the profound new way of thinking that Einstein realised, that we exist as spatially extended structures of the universe - the discrete and separate body an illusion. This simply confirms the intuitions of the ancient philosophers and mystics.

Given the current censorship in physics / philosophy of science journals (based on the standard model of particle physics / big bang cosmology) the internet is the best hope for getting new knowledge known to the world. But that depends on you, the people who care about science and society, realise the importance of truth and reality.

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Just click on the Social Network links below, or copy a nice image or quote you like and share it. We have a wonderful collection of knowledge from the greatest minds in human history, so people will appreciate your contributions. In doing this you will help a new generation of scientists see that there is a simple sensible explanation of physical reality - the source of truth and wisdom, the only cure for the madness of man! Thanks! Geoff Haselhurst (Updated September, 2018)

A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it. (Max Planck, 1920)

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