nymphal

The Philippine populations are almost brachypterous, however, the bracheypterous ratio of BPH males raise with the increase of nymphal density.

菲律宾热带种群雌虫在不同密度下均为短翅型，而雄虫的短翅率随密度增加而上升。

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No diapause is observed in egg, larval and nymphal stages of these ticks.

2种硬蜱的卵、幼虫及若虫期均无滞育现象。

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Photoperiodism is one of the most important phenomena implicated in the control of seasonal development and life cycles in insects living in the temperate climatic zone because photoperiod influences the nymphal development and the number of nymphal instar.

光周期对分布于温带地区的蟋蟀季节发育、保证完整的生活史起着重要的作用，不仅影响若虫的发育速率，诱导卵滞育的产生，而且对若虫龄数也起着调控作用。

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The significantly negative relationship between female brachypterous rate and nymphal density in Zhejiang population showed a lower tolerance to high nymphal density of Zhejiang population than that of Guangxi and Yunnan populations.

广西和云南种群较能适应高密度环境，而浙江种群的适应性较差，其雌虫短翅率与若虫密度呈显著负相关。

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The Zhejiang populations show low brachypterous ratios and have a negative correlation with nymphal density, belonging to the temperate type.

迁入地的浙江各种群属温带型，其雌虫短翅率低且与密度呈显著负相关；

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