In California, citrus orchards were badly damaged by scale insects. To control these scale insects, ladybird beetles were released into these orchards. This type of pest control is known as:

Chemical control

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Beetle control

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Disease control

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Biological control

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Solution

The correct option is D Biological control
Biological control is a type of pest control in which biological means (such as predatory insects) are used to keep pests in check. This reduces the use of chemical pesticides and insecticides, in turn helping in maintaining the soil fertility as well reducing toxicity.

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