Agronomy Degree Practice Exam 2025 - Free Agronomy Practice Questions and Study Guide

Question: 1 / 400

The waste produced by aphids is known as what?

Honeydew

The waste produced by aphids is referred to as honeydew. Aphids are small sap-sucking insects that feed on the phloem of plants, and as they digest the plant sap, they excrete a sugary liquid known as honeydew. This substance can accumulate on the surfaces of leaves and other plant parts, often attracting other insects such as ants, which are drawn to its sweetness. Additionally, honeydew can provide a substrate for the growth of sooty mold, a type of fungus that can develop on the surfaces of leaves where honeydew collects, ultimately impacting photosynthesis in plants.

Frass, on the other hand, refers specifically to the droppings of insects such as caterpillars or beetles, rather than aphids. Guano typically refers to feces from seabirds or bats that is often used as a fertilizer, but it does not relate to aphid waste. Thus, honeydew is the correct term to describe the waste produced by aphids.

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Sooty mold

Frass

Guano

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