. Beneficial insects and mites. Mites; Pests; Insects. Figure 8. A) A predatory mite, Phytoseiulus persimilis, adult and egg. B) The twospotted spider mite, Tetranychus urticae, adult and egg. Phytoseiulus longipes and Amblyseius californicus are also sold in the for control of twospotted spider mites. Phytoseiulus longipes, an African species, tolerates temperatures up to 38CC (100°F) if humidity is high; it can tolerate low relative humid- ities (down to 40%) at 21°C (70°F). Amblyseius cali- fornicus occurs naturally in California, the Mediter- ranean, and several other regions of the w
. Beneficial insects and mites. Mites; Pests; Insects. Figure 8. A) A predatory mite, Phytoseiulus persimilis, adult and egg. B) The twospotted spider mite, Tetranychus urticae, adult and egg. Phytoseiulus longipes and Amblyseius californicus are also sold in the for control of twospotted spider mites. Phytoseiulus longipes, an African species, tolerates temperatures up to 38CC (100°F) if humidity is high; it can tolerate low relative humid- ities (down to 40%) at 21°C (70°F). Amblyseius cali- fornicus occurs naturally in California, the Mediter- ranean, and several other regions of the world. It is an important predator of pest mites in California strawberry fields and is used extensively for green- house releases. Amblyseius californicus also tolerates higher temperatures (up to 32°C/90°F). It consumes mites at a slower rate than Phytoseiulus species, but is able to tolerate short periods of starvation when spider mite densities are low. Mixed releases of Phytoseiulus persimilis and Amblyseius californicus function well in greenhouses where conditions and pest mite population densities are variable. Thrips predators. In addition to spider mite predators, two species of predatory mites feed pri- marily on thrips. Amblyseius cucumeris and Ambly- seius mckenziei (also known as Amblyseius barkeri) feed on the western flower thrips (Frankliniella occi- dental) and the onion thrips (Thrips tabaci), both of which may be serious pests in greenhouses. If introduced early in an infestation, these mites can eliminate thrips populations in greenhouses. Amblyseius cucumeris and Amblyseius mckenziei can subsist for short periods on pollen, fungi, or spider mite eggs when thrips are not available. These mites require high relative humidities and are not tolerant of insecticides. Short days inhibit egg production by predatory mites, making thrips con- trol difficult during winter months. suppliers recommend high release rates of Amblyseius cucumeris and Amblyseius
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Keywords: ., bookauthorillinoisnaturalhi, bookcentury1900, booksubjectinsects
