Aphid
Aphids are a large group of small, soft-bodied, sap-sucking insects in the superfamily Aphidoidea, commonly called plant lice.
Aphids are small, soft-bodied insects that suck sap from plants, often causing damage in gardens and farms. They are widespread worldwide and include more than 4,000 known species.
What it is
Aphids belong to the superfamily Aphidoidea and are also called plant lice, greenfly, or blackfly. They are tiny, pear-shaped insects with long antennae and a pair of tubelike projections called cornicles on the abdomen. Common colours include green, black, yellow, pink, brown, and white.
Why it matters
Aphids are significant pests because they weaken plants by removing sap, distort leaves and stems, and can transmit plant viruses. They also excrete honeydew, which encourages sooty mold growth and reduces crop yields. In Canada, they are frequent in gardens, greenhouses, and crops.
Key details
Aphid life cycles can involve both asexual and sexual reproduction, sometimes alternating between different host plants. They are most diverse in temperate regions, and their feeding often targets actively growing plant tissue. Control methods include natural predators like ladybugs and insecticidal soaps.
In short
- Aphids are sap-sucking insects that can stunt plant growth and spread viruses.
- They have a pear-shaped body and two cornicles near the rear.
- Over 4,000 species exist worldwide, many in temperate areas.
- Common in Canadian gardens and crops, they are managed with natural predators or sprays.
Aphids are common pests in Canadian gardens, greenhouses, nurseries, and crops, and Canadian extension resources describe them as frequent insects on many plants.[16][17]
Quick questions
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Sources
- Encyclopaedia Britannica — https://www.britannica.com/animal/aphidSupports: General definition, morphology, cornicles, and pest effects.
- Royal Horticultural Society — https://www.rhs.org.uk/biodiversity/aphidsSupports: Common names, taxonomy, size range, colour variation, and feeding habits.
- University of Minnesota Extension — https://www.extension.umn.edu/yard-and-garden-insects/aphidsSupports: Identification, symptoms, and management context; size, colours, and cornicles.
- University of New Hampshire Extension — https://extension.unh.edu/resource/aphids-fact-sheetSupports: Sap feeding, virus transmission, honeydew, and sooty mold impacts.
- University of Florida IFAS — https://mrec.ifas.ufl.edu/lsolab/aphids/Supports: Global species count and pest importance.
- ScienceDirect Topics — https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/aphidiidaeSupports: Species count, life-cycle complexity, reproduction, host alternation, and distribution context.