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Effect of photoperiod on the first‐instar development in the lacewing Nineta pallida
Author(s) -
CANARD MICHEL
Publication year - 1990
Publication title -
physiological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 57
eISSN - 1365-3032
pISSN - 0307-6962
DOI - 10.1111/j.1365-3032.1990.tb00500.x
Subject(s) - biology , ecdysis , diapause , photoperiodism , chrysopidae , facultative , instar , larva , neuroptera , zoology , horticulture , botany
Nineta pallida (Schneider) (Neuroptera: Chrysopidae) larvae were reared at 21 C C under various stationary photoperiods. The duration of the first stadium varied with daylength. Long‐day regimes (LD 18:6 and 16:8 h) induced the fastest development, whereas the first ecdysis was more or less delayed in LD 14:10 and 13:11 h. Medium days (LD 12:12 h) resulted in the longest duration of the first stadium and high mortality, and all shorter days (LD 10:14, 8:16 and 6:18 h) in a moderate delay in the first ecdysis in all individuals. The facultative delay in development is thought to be a diapause, and viewed as a factor contributing to the annual synchronization of the life cycle.