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Phytoseiid mites

Amblyseius (= Neoseiulus) fallacis (Garman)
Typhlodromus pyri (Scheuten), T. caudaglans Schuster
T. longipilus Nesbitt, T. vulgaris Ehara

Acari: Phytoseiidae

Adults have a translucent teardrop-shape body (A). A dark mark in the form of an "H" sometimes appears within their body. This mark is red when they feed on European red mites and yellow when they feed on twospotted spider mites. They move very rapidly on the leaves. Nymphs are similar in appearance, and pale colored (B). Eggs are elliptical and clear white (C).

Note: These beneficial predators are very sensitive to pyrethroid and carbamate insecticides. Observations suggest that certain populations may develop resistance.


Along with stigmaeid mites, the phytoseiids are the most abundant predatory mites in apple orchards in this region. They appear in tree canopy mostly during the latter half of the season. Amblyseius fallacis tends to be more noticeable in the tree later as the summer progresses because of prey availability, but is present in the orchard ground cover season long. A number of different Typhlodromus species may be present in eastern fruit orchards; they cannot be differentiated without a microscope.

Note: Established populations of phytoseiids are capable of effecting seasonal biological control of phytophagous mites if not disrupted by the use of non-selective pesticides.

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