An Introduction To ‘Biologicals' In Gardening
The Gardener|August 2019

Gardening is biology, revolving around the biological processes of growth and life. For millions of years, plants have thrived and grown successfully with no human intervention.

An Introduction To ‘Biologicals' In Gardening

Chemical pest control and plant nutrition have become the norm over the past 80 years, though, with many negative side effects recently emerging. The good news is that new natural innovations, offering a long-term holistic alternative, are now emerging – ‘biologicals’.

A biological approach centres around nature, embracing the synergistic relationships that occur naturally to ensure survival and sustainability. As gardeners we have been taught to view bacteria as germs, fungi as diseases, and insects and weeds as pests. However, the scientific truth is that many of these critters are beneficial, even essential, to healthy plant growth and development. When there is an excess of one pest species it is often an indication that the natural balance has been disturbed and an indication of vulnerability.

Natural biological control takes place continuously, in its own unique way, within every ecosystem. Using a garden as an example, biological pest control would include everything from birds feeding on grubs to owls catching rats, to ladybirds keeping aphids under control, or parasitic wasps laying their eggs on caterpillars. Even competitor plants such as alien invasives influence the ecosystem of a garden. Finally, gardeners need to be aware that there are good pathogens – beneficial bacteria, fungi and viruses that feed on microbes and insects. There are also bacteria that are good for the soil, as probiotics are good for your stomach.

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