Root Aphids

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Root Aphids

a group of aphids belonging to various species and living on the roots of herbaceous (less often, woody) plants; dangerous pests of agricultural crops.

Most species of root aphids are flying migratory generations of aphids that begin their life cycle on the aboveground parts of plants. Root aphids infest sugar beets, carrots, lettuce, grains, grapes, rubber plants, fruits, and certain other crops. Counter-measures are biological (for example, the use of ladybugs or larvae of the bulb fly), agrotechnical, and chemical (for example, the use of effective insecticides in the soil).

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Root aphids on lettuce: These insects are a sign that the lettuce is stressed - it's either not being watered enough or is growing out of season when the weather is too hot.