Bug Identifier
Spider Mite
Community identification

Spider Mite

Tetranychus urticae (Two-spotted spider mite is a common species, but there are many others)

Order & Family
Order: Trombidiformes, Family: Tetranychidae
Size
Typically 0.2 to 0.5 mm (0.008 to 0.02 inches) in length, making them barely visible to the naked eye.
See this bug in the Encyclopedia

Natural Habitat

Spider mites are found globally, thriving in warm and dry environments. They are common in gardens, agricultural fields, greenhouses, and even indoors on houseplants. They prefer the undersides of leaves for feeding and reproduction.

Diet & Feeding

Spider mites are plant feeders. They use their piercing-sucking mouthparts to feed on the chlorophyll within plant cells, which results in the characteristic stippling on leaves. They feed on a wide variety of plants, including ornamental plants, fruit trees, vegetables, and field crops.

Behavior Patterns

Spider mites are known for their ability to reproduce rapidly, especially in warm, dry conditions. They spin fine silk webbing, particularly on the undersides of leaves and around growing tips, which can help protect them from predators and pesticides. They tend to cluster in colonies and can quickly infest an entire plant. Their presence often becomes noticeable when leaves show stippling, yellowing, or bronzing.

Risks & Benefits

Risks: Spider mites are major agricultural and horticultural pests. Their feeding can cause significant damage to plants, leading to reduced photosynthesis, stunted growth, leaf drop, and even plant death in severe infestations. They can drastically reduce crop yields and quality. Benefits: In natural ecosystems, they serve as a food source for various predatory insects and mites, helping to maintain ecological balance. However, their destructive impact on cultivated plants far outweighs any perceived benefits for humans.