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Observations on the biology of Subcoccinella vigintiquattuor‐punctata (L.) in southern England
Author(s) -
RICHARDS AOLA M.,
POPE R. D.,
EASTOP V. F.
Publication year - 1976
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1976.tb01223.x
Subject(s) - diapause , biology , overwintering , hibernation (computing) , photoperiodism , temperate climate , pest analysis , ecology , instar , population , reproductive biology , zoology , demography , larva , botany , embryo , state (computer science) , algorithm , sociology , computer science , embryogenesis , microbiology and biotechnology
1 Subcoccinella 24‐punctata (L.) is exclusively phytophagous, and is widely distributed throughout Britain. 2 Under laboratory conditions the duration of pre‐adult instars is about 6 weeks. Adults appear from the end of June onwards. Many enter reproductive diapause at the end of July, but remain active till the end of October. 3 Reproductive diapause is determined by the interaction of photoperiod and temperature. 4 Hibernation is unstable, and there may be high mortality in overwintering adults. These finally die during May and June. 5 The cool temperate climate limits the population size, preventing it from reaching pest proportions.