Phytoseiidae (Acarina: Mesostigmata) in the New Jersey Apple Orchard Environment With Descriptions of Spermathecae and Three New Species

Abstract

In New Jersey, Typhlodromus pomi (Parrott) was the only predacious phytoseiid mite on most non-sprayed apple and deciduous trees. It also became the most numerous phytoseiid mite recolonizing apple trees a year after toxic spray residues had dissipated. Amblyseius fallacis (Garman) was the first phytoseiid mite collected from apple trees following cessation of toxic sprays and was usually abundant at the time of large red mite populations; later, an influx of several different species occurred. A. fallacis was the most common phytoseiid mite on low growing plants and was able to tolerate higher residues of toxic materials than other species. Other phytoseiids taken from sprayed apple trees in order of abundance included A. driggeri n. sp., A. amicus (Chant), T. longipilus Nesbitt, T. conspicuus (Garman), T. mexicanus (Garman), T. caudiglans Schuster, and A. pepperi sp. n. Species other than T. pomi found on non-sprayed apple trees were A. finlandicus (Oudemans), T. longipilus, T. caudiglans, and T. conspicuus. None of these species was entirely confined to apple. Five other species were collected that were not found on apple: T. flumenis Chant, T. pyri Scheuten, A. elongatus (Garman), A. okanagensis (Chant), and A. picketti sp. n. Three species collected from greenhouse plants in association with tetranychid mites were: A. fallacis, T. longipilus, and A. picketti.Three new species of Amblyseius are described. Two undescribed males and the spermathecae of the females are illustrated.

Survey of phytoseiid mites (Acari: Phytoseiidae) in orchards and surrounding vegetation of northwestern Europe, especially in the Netherlands. Keys, descriptions and figures

“…14f), -the length of the macroseta on basitarsus leg IV is much longer in A. cucumeris. A. reductus also shows resemblance to A mblyseiuspepperi Specht, 1968, which occurs (according to Karg (1971)) on apple-and willow-trees (Salixsp.) and oak, and of which 1 specimen has been found in an apple orchard in the Netherlands.…”

“…A. pepperi is distinguished from A. reductus and A. masseei by: -the size of the idiosoma (365-422 ~), longer than A. reductus, shorter thanA, masseei, -the relative lengths ofdorsalsetae (i4, i5, i6, I2 and z5 are longer than in A. masseei; setae i3, z2, z4 and s4 (a.o.) are longer than in A. reductus), -th~ shapes of the ventrianal shield and pre-anal pores are different (see Specht, 1968), -the shape of the spermatheca is different (see Specht, 1968).…”

“…Discussion: on the ground of descriptions in literature (Nesbitt, 1951;Chant, 1958 and1959;Dosse, 1958b;Specht, 1968;Karg, 1970 and1971), A. masseei (Nesbitt) cannot be distinguished satisfactorily from Amblyseius.maior Karg, 1970. Karg gives for the length of Zs in A. masseei 72/zm (Karg, 1970) and in A. maior 105-130 tzm (Karg, 1971), but measuring of paratypes of A. masseei showed a length of 118-119 #m for Zs; s4 is according to Karg (1971) 59 #m in A. masseei and 55-57/~m in A. maior; in the paratypes ofA.…”

“…Genus Euseius Wainstein, 1962 Euseius finlandicus (Oudemans, 1915) Typhlodromus finlandicus (Oudemans), Nesbitt, 1951 Typhlodromus (Amblyseius)finlandicus (Oudemans), Chant, 1958;Chant, 1959 A mblyseiusfinlandicus (Oudemans), Athias-Henriot, 1958b;Athias-Henriot, 1960b;Specht, 1968;Chant and Hansell, 1971;Karg, 1971 Euseius finlandicus (Oudemans), Karg, 1982 Female Length ofidiosoma: 320-426/~m; mean = 358.6/zm; s.d. = 32.1.…”

The genus Amblyseius (Acari: Phytoseiidae) in Greece, with the Description of a New Species

“…Amblyseius mycophilus Karg, 1970: 290 (Synonymy by Ragusa & Athias-Henriot, 1983. Amblyseius picket ti Specht, 1968: 681 (Synonymy by Ragusa & Athias-Henriot, 1983 …”