Voltinism


Also found in: Dictionary, Medical, Wikipedia.
Related to Voltinism: multivoltine

Voltinism

 

the ability of many insect groups to produce from one to several generations a year. Species producing one generation a year are called univoltine species; those producing two generations are bivoltine; and those producing several generations, polyvoltine. Some univoltine species are, for example, flea beetles, most of the Acridoidea, and cereal shield bugs. The codling moth and large white cabbage butterfly are univoltine in the north and polyvoltine in the south of Russia.

The ability of the Chinese silkworm to produce from one to seven or eight generations (harvests of cocoons) a year is one of the characteristics by which silkworm varieties are distinguished. The butterflies of bivoltine varieties are smaller than those of univoltine varieties, and the quality of the cocoons spun by the caterpillars is lower, but the bivoltine varieties are quick to mature and are hardy. Crossbreeding bivoltine varieties with univoltine varieties which yield higher quality silk results in new silkworm breeds distinguished by high viability, large cocoons, high silk yield, and good technological qualities of their silk.

REFERENCES

Mikhailov, E. N., and P. A. Kovalev. Selektsiia i plemennoe delo v shelkovodstve. Moscow, 1956.
Uchebnaia kniga shelkovoda. Moscow, 1966.
Bei-Bienko, G. Ia. Obshchaia entomologiia. Moscow, 1966.

P. A. KOVALEV

References in periodicals archive ?
Latitudinal and local geographic mosaics in host plant preferences as shaped by thermal units and voltinism in Papilio spp.
Voltinism, emergence periods, and adult flight periods are quite variable for odonates in general.
Growth and voltinism of lotic midge larvae: patterns across an Appalachian Mountain basin.
Latitudinal variation in voltinism and life history traits in the lesser migratory grasshopper.
The change in voltinism between Massachusetts and the country of Georgia was not driven by differences in total seasonal heat units, as examination of temperature records from each study region showed little to no difference in cumulative day-degrees (approx.
McNeil and I provided evidence that host-plant quality influences the induction of larval diapause and subsequent voltinism in the polyphagous insect herbivore Choristoneura rosaceana (Lepidoptera: Tortricidae).
Latitudinal variation in voltinism, the number of generations produced per season, is known to occur in A.
Climatic legacies and sex chromosomes: Latitudinal patterns of voltinism, diapause, size and hostplant selection in 2 species of swallowtail butterflies at their hybrid zone.
This variability in climatic factors has got consequences on occurrence/disappearance, seasonality, and voltinism of certain bee species found in central Uganda.
Voltinism, egg structure, and descriptions of immature stages of Cryphocricos hungerfordi (Hemiptera: Naucoridae).
Herein we assess the genetic potential for the evolution of protandry in the pitcher-plant mosquito, Wyeomyia smithii (Coq.), and consider the effect of voltinism and synchrony of seasonal development on the evolution of protandry.