Nemorilla pyste ( Walker, 1849 ), Walker, 1849

O’Hara, James E., 2005, A review of the tachinid parasitoids (Diptera: Tachinidae) of Nearctic Choristoneura species (Lepidoptera: Tortricidae), with keys to adults and puparia, Zootaxa 938, pp. 1-46: 30-31

publication ID

http://doi.org/ 10.5281/zenodo.171153

publication LSID

lsid:zoobank.org:pub:8FDFDC54-F3E5-4876-A999-170BCB078147

persistent identifier

http://treatment.plazi.org/id/7E6C879C-3306-945B-FE97-FDA32408FB0C

treatment provided by

Plazi

scientific name

Nemorilla pyste ( Walker, 1849 )
status

 

Nemorilla pyste ( Walker, 1849)   , Fig. 47 View FIGURES 43 – 48. 43

Host records ex. Choristoneura fumiferana:   Tothill 1913, as Exorista pyste   ex. Tortrix fumiferana   (QC); Richmond 1941 b, as Nemorilla   [= N. maculosa   ] ex. Cacoecia fumiferana   on spruce (SK, MB, ON); Daviault 1946, as Nemorilla maculosa   ex. Archips fumiferana   (QC); Dowden et al. 1951, as Nemorilla floralis   ex. Archips fumiferana   (NY); Raizenne 1952 (ON); McGugan & Blais 1959 (ON); Schaffner 1959, as Nemorilla floralis   (northeastern United States); Blais 1960 (QC); Blais 1965 (QC); Huber et al. 1996 (NB).

Host records ex. Choristoneura fumiferana   and/or Choristoneura occidentalis:   Brown 1941, as Nemorilla maculosa   ex. Cacoecia fumiferana   ( Canada); † Dowden et al. 1948, as Nemorilla floralis   ex. Archips fumiferana   (North America); † Zwolfer 1961, as Nemorilla maculosa   ex. C. fumiferana   (North America); † Arnaud 1978, ex. C. fumiferana   (BC, OR, SK, MB, ON, QC, NY).

Host records ex. Choristoneura fumiferana   , Choristoneura occidentalis   and/or Choristoneura pinus   : † Ross 1952, ex. spruce and/or jack pine budworm ( Canada).

Host records ex. Choristoneura occidentalis:   McKnight 1974 (CO).

Host records probably ex. Choristoneura occidentalis:   Bedard 1938, as Nemorilla floralis   ex. Cacoecia fumiferana   on Douglas fir (“northern Rocky Mountain region”); Wilkes et al. 1949, ex. C. fumiferana   (BC); Carolin & Coulter 1959, as Nemorilla floralis   ex. C. fumiferana   (OR); † Coppel 1960, ex. C. fumiferana   (BC).

Host records ex. Choristoneura parallela:   Franklin 1943, as Nemorilla floralis   ex. Cacoecia parallela   (MA); † Arnaud 1978 (MA); † Huber et al. 1996 ( America north of Mexico).

Host records ex. Choristoneura pinus:   Richmond 1938, as “Hemorilla” maculosa   ex. spruce budworm, Cacoecia fumiferana   , on jack pine (MB, ON); Richmond 1940, as Nemorilla maculosa   ex. jack pine budworm, Cacoecia fumiferana   , on jack pine (SK, MB, ON); Richmond 1941 a, as Nemorilla maculosa   ex. jack pine budworm, Archips fumiferana   , on jack pine (SK); Dixon & Benjamin 1963, as Nemorilla floralis   (WI); † Arnaud 1978 (WI); † Huber et al. 1996 ( America north of Mexico).

Host records ex. Choristoneura rosaceana:   Davis 1912, as Exorista pyste   ex. Archips rosaceana   ( IL); Schaffner 1959, as Nemorilla floralis   ex. Archips rosaceana   (northeastern United States); † Arnaud 1978 ( IL, northeastern United States); † Huber et al. 1996 ( America north of Mexico).

Host records ex. Choristoneura rosaceana   and/or Pandemis limitata:   Pfannenstiel & Unruh 2003 (WA); Cossentine et al. 2004 (BC).

Nemorilla pyste   is a common species that is widespread throughout Canada, the United States, and Mexico ( O’Hara & Wood 2004). It is a dark coloured tachinid, generally 4.0– 7.5mm long, with three black stripes on the thorax (median stripe quite broad) and a mottled abdomen. It was included in a key to the puparia of dipterous parasitoids of Choristoneura   species by Ross (1952) and in a key to the adults of dipterous parasitoids of C. occidentalis   (as C. fumiferana   ) in British Columbia by Coppel (1960).

The mode of oviposition has not been described for Nemorilla pyste   , but is probably similar to that in other members of the tribe Winthemiini (including Hemisturmia parva   and Smidtia fumiferanae   of the species treated here). The female uses a telescopic ovipositor to attach eggs to the body of a host. The eggs hatch after several days and the first instar immediately burrows into the host. Nemorilla pyste   attacks late instar larvae of Choristoneura   species and emerges from the pupa ( Davis 1912; Dowden et al. 1948; Carolin & Coulter 1959; McKnight 1974). It is likely, based on specimens of N. pyste   in the Canadian National Collection of Insects reared from various hosts, that the tachinid either pupariates in the host pupa or emerges as a mature maggot and pupariates elsewhere. The parasitoid has two or more generations per year and overwinters as a larva in various hosts ( Schaffner 1959).

Nemorilla pyste   has been reported frequently as a parasitoid of Choristoneura   species, but the level of parasitism was generally very low ( Dixon & Benjamin 1963; Dowden et al. 1951; Carolin & Coulter 1959; McGugan & Blais 1959; Blais 1960; McKnight 1974). It was not ranked among the top 15 hymenopterous and dipterous parasitoids of C. occidentalis   (as C. fumiferana   ) in British Columbia in a study by Wilkes et al. (1949), nor included among the parasitoids of spruce budworm in Maine by Tilles and Woodley (1984). However, during outbreaks of C. pinus   in Saskatchewan in 1939 and 1940, N. pyste   (as N. maculosa   ) was considered one of the most important parasitoids of the budworm ( Richmond 1940; Richmond 1941 a).

Nemorilla pyste   has a broad host range. It is recorded from about 30 species in each of the Pyralidae   and Tortricidae   and has one to several hosts in each of the Gelechiidae   , Glyphipterygidae   , Hesperiidae   , Lycaenidae   , Lymantriidae   , Noctuidae   , Oecophoridae   , and Yponomeutidae ( Arnaud 1978)   .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Tachinidae

Genus

Nemorilla

Loc

Nemorilla pyste ( Walker, 1849 )

O’Hara, James E. 2005
2005
Loc

Yponomeutidae (

Arnaud 1978
1978