Phytoseiidae predating thrips

06-Jun-2020 08:51

They mostly attack mites, but also small insects, nematodes and fungi, and may feed on plants, including pollen and extrafloral nectaries.Most species develop within a week at 27°C and 60-90% relative humidity and usually deposit 30-40 eggs per female.Dispersal by winds is due to prey depletion; the mites (mostly young, mated females) moving onto exposed surfaces and placing themselves in a position to be lifted by air currents.Once on plants the predators are attracted to their prey by volatiles emitted by the pest-damaged foliage as well as to spider mite cues, such as the webbing and other residues.

The stigmata open between legs III and IV and the metasternal plates are small.

Under winter and early spring greenhouse growing conditions, suppression of thrips by predatory mites can vary considerably on a species basis.

For certain mite species, shorter photoperiods, cooler temperatures, and lower vapor pressures translate to reductions in predation, oviposition, and survival.

DOI: 10.4039/Ent90275-5 [Cross Ref] Athias-Henriot C. Phytoseiidae et Aceoseiidae (Acarina, Gamasina) d’Algérie.

phytoseiidae predating thrips-62

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Phytoseiidae: Clé des genres Amblyseius Berlese (Suite) et Seiulus Berlese. Type III species are generalists that often prefer prey other than spider mites (e.g. Type IV phytoseiids are generalists that develop and reproduce best on pollen, feeding also on plant juices.

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