Washington Pesticide Laws and Safety Practice Test

Question: 1 / 400

How are pesticides classified as systemic?

When they kill pests on contact

When they are absorbed by the plant and distributed

Pesticides are classified as systemic when they are absorbed by a plant and then distributed throughout its tissues. This allows the pesticide to affect pests that feed on the plant, even if the pests are not directly contacted by the pesticide at the time of application. When a systemic pesticide is applied, it moves through the plant's vascular system, making it effective against insects that consume any part of the plant—roots, stems, leaves, or flowers.

In contrast, pesticides that kill on contact only affect organisms that come into direct contact with the chemical and do not have this systemic capability. Systemic pesticides are particularly useful in protecting plants from pests that hide or feed within the plant tissues. Effective usage and understanding of systemic pesticides are crucial for integrated pest management strategies in agriculture and gardening.

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When they are only effective in dry conditions

When they have low toxicity

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