voltinism

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voltinism

a form of polymorphism in insects where some enter DIAPAUSE and others do not.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
migratoria, this coarse adjustment for hatching is controlled by environmental cues experienced by the eggs and their parents in bivoltine and trivoltine populations (Verdier 1972, Hakomori and Tanaka 1992, Tanaka 1992, Yamagishi and Tanaka 2009).
Similarly, polyvoltine strains are hardy but less productive, while the bivoltines strains are susceptible to diseases under adverse biotic and abiotic conditions.
J&K state is known for producing bivoltine silk of international quality.
tsugae is typically bivoltine, with 4 larval instars before pupation, however, it can be induced to have multiple generations in a year in the laboratory by manipulating conditions for optimal egg-laying.
The seasonal changes are mainly the result of different life cycles (i.e., univoltine or bivoltine) which are correspondingly synchronized (Cayrou & Cereghino, 2005).
The core objective of the scheme is to scale up production, bivoltine and improved cross- breed silk cocoons in the country through cluster approach
In evaluation report he concluded that the project increased the income of bivoltine sericulture farmers and reelers from sericulture and increases in the production of quality raw silk (above 2A level).
fluminea generally has a bivoltine reproductive cycle in response to temperature regimes in rivers, lakes, and reservoirs (Aldridge & McMahon 1978, Kennedy & Van Huekelem 1985, Rajagopal et al.
Regular sampling near Las Cruces, as well as supplemental collecting, indicated that both restheniines are bivoltine. Overwintered eggs hatched during the last two weeks of March at the main study site, and first-generation adults of both species appeared by mid-April and were present until early May.
Adults have been collected in December-January and May-June (Table 2) which might suggest a bivoltine species.
These two late-season species were sampled in case the parasites sometimes linger that long in their hosts and in case the species is bivoltine or multivoltine rather than limited to one generation per year.