Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Roger B. Ryan"'
Autor:
Roger B. Ryan
Publikováno v:
Environmental Entomology. 26:703-715
The larch casebearer, Coleophora laricella (Hubner), caused severe defoliation in the Blue Mountains in the 1970s. A biological control program using introduced parasitoids resulted in the establishment of 2 species, Agathis pumila (Ratzeburg) and Ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d9551de0013b8447ab667825cc7f2f5
https://doi.org/10.1093/ee/26.3.703
https://doi.org/10.1093/ee/26.3.703
Autor:
Roger B. Ryan
Publikováno v:
Environmental Entomology. 19:1873-1881
Two species of European parasites, Agathis pumila (Ratzeburg) and Chrysocharis laricinellae (Ratzeburg), have become established in a classical biological control project against the larch casebearer, Coleophora laricella (Hubner), in Oregon. A coars
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5da2d723866bae95269962b3b6b3cc09
https://doi.org/10.1093/ee/19.6.1873
https://doi.org/10.1093/ee/19.6.1873
Autor:
Roger B. Ryan
Publikováno v:
The Canadian Entomologist. 117:935-939
Between 1973 and 1983 two newly introduced parasites, Agathis pumila (Ratz.) and Chrysocharis laricinellae (Ratz.), caused an increasing impact on populations of the larch casebearer, Coleophora laricella (Hbn.), as measured by percentage parasitism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dd1bbcaba9af20b36792020649ad96d
https://doi.org/10.4039/ent117935-8
https://doi.org/10.4039/ent117935-8
Publikováno v:
Annals of the Entomological Society of America. 74:213-216
We describe effects of mating, female age, photoperiod, host storage temperature, and host availability on reproduction of Telenomus californicus Ashmead (Hym.: Scelionidae). Reproduction is arrhenotokous. Proportion of female progeny increases as th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1aa7b86e1bcd34f8f38b76358cdfaf9b
https://doi.org/10.1093/aesa/74.2.213
https://doi.org/10.1093/aesa/74.2.213
Autor:
Roger B. Ryan, C. M. Yoshimoto
Publikováno v:
The Canadian Entomologist. 107:1301-1304
Chrysocharis laricinellae (Ratz.) from Austria, Sweden, England, and Wisconsin, some of which were thought possibly different species, were crossed. Hybrid sex ratios in this arrhenotokous species were similar to parental types, indicating conspecifi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::317adad8bff51e4aea1237fc7040e4b7
https://doi.org/10.4039/ent1071301-12
https://doi.org/10.4039/ent1071301-12
Autor:
Roger B. Ryan
Publikováno v:
The Canadian Entomologist. 112:1239-1248
Types of cages and methods for rearing, collecting, holding, and scheduling adult emergence are described for hymenopterous parasites of Coleophora laricella (Hübner). Methods differ depending on whether the parasite attacks needlemining larvae, e.g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85f0e2b73f0b478d58ec44cb77bcdf63
https://doi.org/10.4039/ent1121239-12
https://doi.org/10.4039/ent1121239-12
Autor:
Roger B. Ryan
Publikováno v:
Journal of Insect Physiology. 11:1331-1336
Coeloides brunneri was reared under combinations of temperature (65°–85°F) and photoperiod (2–22 hr) to determine the incidence of larval diapause. Long days and high temperatures favoured unarrested development. Short days and low temperatures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39ce7240bea703a8fd2f5d6570fb6564
https://doi.org/10.1016/0022-1910(65)90169-1
https://doi.org/10.1016/0022-1910(65)90169-1
Autor:
Julius A. Rudinsky, Roger B. Ryan
Publikováno v:
The Canadian Entomologist. 94:748-763
Natural control factors are normally relied on to hold destructive insects below the level of economic damage. When insect control is attempted every effort should be made to prevent injury to beneficial parasites and predators.The Douglas-fir beetle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4540903b4d723d046a06291498f3a3f4
https://doi.org/10.4039/ent94748-7
https://doi.org/10.4039/ent94748-7
Autor:
Roger B. Ryan
Publikováno v:
Annals of the Entomological Society of America. 64:205-208
Individual pupae of the greater wax moth, Galleria mellonella (L.), received either single attacks or were super- or multiparasitized by Apechthis Ontario (Cresson) and Itoplectis quadricingulatus (Provancher). Parasite progeny emerged from approxima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1a271d72e4da1fa82ec0752c2c02434
https://doi.org/10.1093/aesa/64.1.205
https://doi.org/10.1093/aesa/64.1.205
Autor:
Roger B. Ryan
Publikováno v:
The Canadian Entomologist. 91:520-525
The Douglas-fir beetle, Dendroctonus pseudotsugae Hopk., is a constant threat to Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests because of its ability to kill large quantities of this important timber tree. In the search for more effectiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29981b4400e7793e1bb2d3cc87f91dc2
https://doi.org/10.4039/ent91520-8
https://doi.org/10.4039/ent91520-8