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Twospotted Spider Mite
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Life stages of the twospotted spider mite |
Twospotted spider mite feeding damage to pear (blackened leaves) |
Life Cycle: Overwinter as adult females under host. They migrate into the trees in spring or summer. Several generations per year depending on the temperatures.
Monitoring: Collect spur leaves and shoots biweekly from the end of May to harvest to determine mite numbers using mite sampling and leaf brushing techniques.
Hosts: Pear, stone fruits, occasionally apple.
Comments: Adults resemble McDaniel mites but lack the black spots near the hind end. Eggs are round and clear like those of McDaniel spider mites; predaceous mite eggs are larger and ovoid. Damage appears first on inside leaves, then gradually spreads throughout the tree as numbers increase. Damaged pear leaves turn black at high temperatures; leaves of stone fruits will bronze and dry up.
Body length: Adult - 0.4mm; Mature nymph - 0.35mm
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