抄録
Effects of a short photoperiod (8L-16D) on the nymphal growth were examined in Laodelphax striatellus, Sogatella furcifera and Sogatella longifurcifera. The short photoperiod caused marked elongation of nymphal duration especially of the 4th instar in L. striatellus, while no difference was observed between long and short photoperiods in other two species.
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