EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Differences in thermal requirements for diapause termination in 2 western choristoneura spp lepidoptera tortricidae


Canadian Entomologist 109(11): 1469-1474
Differences in thermal requirements for diapause termination in 2 western choristoneura spp lepidoptera tortricidae
Storage of diapausing larvae of C. viridis and C. occidentalis at low temperature (2.degree. C) appeared to be sufficient stimulus to terminate diapause. Reactivation at 25.degree. C occurred sooner and was more synchronous with longer storage at 2.degree. C. Highest survival was obtained after storage of 20-22 wk for both C. viridis and C. occidentalis. Intraspecific and interspecific reactivation rates were compared by analysis of covariance, using the model ln Y = a + B ln X, where Y = larval emergence in days at 25.degree. C and X = storage in weeks at 2.degree. C. Intraspecific sex differences were not significant, indicating that protandry observed in this laboratory in both species must be due to some other factor. C. viridis had substantially less stringent thermal requirements for diapause termination than C. occidentalis. Diapause in the 2 spp. is discussed.


Accession: 005151673



Related references

Differences in thermal requirements for diapause termination in two western Choristoneura spp. (Lepidoptera: Tortricidae). Canadian Entomologist 109(11): 1469-1474, 1977

Response of the western spruce budworm, Choristoneura occidentalis (Lepidoptera: Tortricidae), to temperature: the stochastic nature of developmental rates and diapause termination. Environmental Entomology, 136: 1549-1556, 1984

Rearing diapause and diapause-free western Spruce budworm (Choristoneura occidentalis) (Lepidoptera : Tortricidae) on an artificial diet. Canadian Entomologist 104(3): 417-426, 1972

Desiccation resistance in pre-diapause, diapause and post-diapause larvae of Choristoneura fumiferana (Lepidoptera: Tortricidae). Bulletin of Entomological Research 91(5): 321-326, 2001

Post diapause development of sympatric choristoneura occidentalis and choristoneura retiniana lepidoptera tortricidae and their hybrids. Canadian Entomologist 117(12): 1479-1488, 1985

Diapause termination and the thermal requirements for post diapause development in 6 ontario canada populations of the spotted tentiform leaf miner phyllonorycter blancardella lepidoptera gracillariidae. Canadian Entomologist 115(4): 387-392, 1983

Genetic relationships among representative populations of 5 choristoneura species choristoneura occidentalis choristoneura retiniana choristoneura biennis choristoneura lambertiana and choristoneura fumiferana lepidoptera tortricidae. Canadian Entomologist 113(9): 857-866, 1981

Thermal requirements for diapause termination in laboratory cultures of Heliothis zea and H. virescens (Lepidoptera: Noctuidae). Environmental Entomology, 154: 919-923, 1986

Sex attractants for two species of western spruce budworm, Choristoneura biennis and Choristoneura viridis (Lepidoptera: Tortricidae). Canadian entomologist: 106 (2) 157-159, 1974

Sex attractants for 2 species of western spruce budworm choristoneura biennis and choristoneura viridis lepidoptera tortricidae. Canadian Entomologist 106(2): 157-159, 1974