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为了探究高温逆境条件下加州新小绥螨的生存特性对其种群发育的影响,利用短时高温刺激试验,研究加州新小绥螨卵、幼螨、雌成螨在35、38、42、45℃等4个温度下、处理1~8 h后的孵化率、存活率、后期发育历期及繁殖的影响.结果表明:处理温度越高,时间越长,卵和幼螨的存活率越低,其后续发育历期随处理温度升高和时间增加先缩短后延长.当温度为38℃,处理8 h后,卵的后续发育历期最短,为4.1 d.卵在45℃下处理2 h以上将不能正常孵化,而幼螨在45℃下处理8 h后不能存活;雌成螨产卵期和产卵量基本随温度升高先增加后降低,35℃处理8 h后,单雌产卵量最高,为38.9粒;38℃处理8 h后,单雌产卵量为36.7粒;45℃处理8 h后,单雌产卵量仅为14.5粒.短时高温主要影响加州新小绥螨的孵化率、存活率和后续发育历期,对雌成螨的产卵前期和存活率影响较小.
In order to explore the impact of the survival characteristics of Neospretus calorex on its population development under high temperature stress conditions, the effects of short-term and high-temperature stimulation test on the eggs, larvae and females of Neospora californica in 35,38,42,45 ℃ and other 4 temperatures, the hatching rate, survival rate, later developmental period and reproduction influence after 1 ~ 8 h treatment.The results showed that: the higher the treatment temperature, the longer the survival time, the lower the survival rate of eggs and larvae , And its subsequent developmental period was shortened and then lengthened with the increase of treatment temperature and time.When the temperature was 38 ℃ and treated for 8 h, the earliest developmental period of eggs was 4.1 d.The eggs were treated at 45 ℃ for 2 h The above will not hatch properly, while the larvae can not survive after being treated at 45 ° C for 8 h. The oviposition and fecundity of female adults increase first and then decrease with increasing temperature. After being treated at 35 ° C for 8 h, The highest amount of eggs was 38.9 grains after ovariectomized at 38 ℃ for 8 h, the fecundity per females was 36.7, while the fecundity was only 14.5 after 8 h treatments at 45 ℃. Mite hatching rate, survival rate and subsequent developmental duration had little effect on pre-oviposition and survival rate of adult female mites.