Life history of the flea beetle, Argopistes coccinelliformis Csiki (Coleoptera:Chrysomelidae) VII.Effects of photoperiod and temperature on induction of reproductive diapause in newly emerged adults

概要

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At 20℃, only 0-19% of newly emerged females of Argopistes coccinelliformis laid eggs under short-day conditions (LD 13.5 : 10.5, 13 : 11 and 12 : 12), but all females laid eggs within 30 days after emergence under long-day conditions (LD 14.5 : 9.5 and 15 : 9). The critical photoperiod was between LD 13.5 : 10.5 and 14 : 10. At25℃, 27-39% of females laid eggs within 60 days after emergence even under short-day conditions (LD 12.5 : 11.5 and 12 : 12). All females laid eggs under long-day conditions (LD 14.5 : 9.5 and 15 : 9), but the preoviposition periods were longer than those at 20℃. The critical photoperiod was between LD 14 : 10 and 14.5 : 9.5 when it was estimated on the 20th day from emergence and between LD 12.5 : 11.5 and 13 : 11 when it was estimated on the 60th day. At 28℃, 41-73% of females laid eggs within 60 days after emergence under short-day conditions (LD 13 : 11, 12.5 : 11.5 and 12 : 12), but 14-33% of females did not lay eggs, even under long-day conditions. The critical photoperiod could not be determined. From the past and the present data, I concluded that A. coccinelliformis might produce 4 generations per year around Tokyo, central Japan, if new sprouts of host plants are available beyond the spring. The best season for trimming host plants would be late autumn-early winter to control the flea beetle population.
日本応用動物昆虫学会の論文
2001-02-25