Keeping Garden Pests at Bay

The biodiversity in your yard and garden will contribute to the pleasure you gain from growing herbs, but some wildlife will be beneficial, while others may appear to be incurable pests.

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DK - Simple Steps to Success: Herbs © 2009 Dorling Kindersley Limited

Biological Control

This is the use of nature’s own armory of predators, parasites, and pathogens to control pests. They are of most use where they can be released into a protected environment, such as a greenhouse. Some nematodes, as used to control slugs and vine weevil, can also be used outdoors, but only when soil temperatures are at or above 41 degrees F. Accurate and early identification is essential to ensure the correct control is used and at the right time of year. If in any doubt, seek advice. In some cases, chemical control may be the only option when you have an infestation, but only apply according to the instructions, especially when spraying edible crops. Be aware that the use of insecticides is likely to kill biological controls and beneficial insects.

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