Chemical vs. Biological Methods To Control Garden Pests

At times, it can be difficult for homeowners to choose from among the plethora of available control measures to get rid of pests invading their gardens. There are many chemical as well as biological options which can be used for protecting garden flora from harmful critters. However, it is important to comprehend some fundamental differences between the two alternatives before selecting a particular one. Doing this will help you to choose the most effective management approach for garden pest control in Melbourne:

Chemical pest control

Chemical Controls

Chemical pesticides are essentially man-made products designed for reducing pest populations without causing any harm to the plants. They work in various ways for eradicating common garden critters. Some of them terminate the pests upon direct physical contact, whereas others interfere with their reproduction system. There are yet others which cause detrimental behavioural changes or stunt physical growth. Most of these controls work quickly for achieving desired results. They can be used for keeping many different types of insects at bay. However, their efficacy lasts only for a short period of time, at the end of which reapplication becomes the only way for ensuring continued control.

Biological Controls

These make use of living organisms like parasites, pathogens and natural predators for regulating the populations of garden pests. They include useful bugs like parasitic spiders and lady beetles that prey on detrimental insects while leaving the plants unharmed. Certain useful microbes are also available commercially, which can reduce pests quickly to manageable levels. For example, the bacterium Bacillus thuringiensis attacks caterpillars once the creatures have fed on the leaves of treated plants.

Biological pest Controls


Chemical pest controls are generally always available and quite inexpensive too. Many of them have even been proven safe and used for decades because of their ability to provide quick results. Some newer ones even mimic natural substances for greater effectiveness. On the other hand, biological products have become more widespread due to their preference among gardeners. They are now made available at rates as cheap as that of their chemical counterparts and can provide long lasting results. Besides that, they have more restricted impact over the environment.


As has been stated already, chemical pest management methods usually last for a limited time period. At times, they can even persist and allow the harmful insects to develop resistance against them. Biological measures often take a long time to produce significant effect. And they generally do not work against imported species.

The best way to control garden pests effectively is by using a combination of biological and chemical controls.


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