Population characteristics of Laodelphax striatellus and the relationship with temperature
Population characteristics of Laodelphax striatellus and the relationship with temperature
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发表时间：
2010
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通讯作者：
Z. Ai
中科院分区：
文献类型：
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作者：
Z. Ai
The population structure and dynamics of the small brown plant hopper(SBPH),Laodelphax striatellus(Fallen),were investigated from 2007 to 2008 in Nanjing,and the relationship between the population size of SBPH and temperature was also analyzed.The results showed that there were two population peaks in spring and autumn,respectively,and two corresponding lower amounts in summer and winter.The lower population size in summer occurred in high temperature period.High-instar nymphae were dominant in the overwintering population of SBPH.The age-distribution of the summer population varied with years.Older nymphae were dominant in the summer population in 2007,whereas it was younger nymphae in 2008.The nymphae collected from rice fields developed normally in laboratory,and the amount of laying eggs was significantly increased after reared one generation.The summer population of SBPH did not diapause in Nanjing.The cold hardiness of SBPH was strong,and the super-cooling point of the 3-4th instar nymphae was below -22℃,and there was no significant difference among reared temperatures or stages of overwintering.
