It is conceivable that pubescence forms a barrier, particularly for young nymphs . 可以想象，柔毛能形成一个阻障，特别是对幼小的若虫。
2.
Tv quiz drag nymphs blew jfk cox 电视测验阻力若虫吹了jfk考克斯。
3.
That evening another team member found four more larvae 那天傍晚，另一位队员也找到了四只若虫。
4.
Comparison of controlling efficacy of 4 pesticides to bemisia tabaci gennadius nymphae 4种农药防治棉花烟粉虱若虫药效试验
5.
In his palm lay a small larva , a gladiator in the second stage of its life 他的手掌上有只很小的若虫，是一只螳，正值生命的第二阶段。
6.
Both nymphs and adults located at higher position of plants and fed much more frequently on 0n rice plants than that on 200n rice plants , and differed markedly among bph populations 在低氮稻株上若虫和成虫均偏向于较高的位置取食和产卵，而且不同的种群有明显差异。
7.
The nymphae and ten - day old female adult were more sensitive to the fungal spores than the thirty - day old female adult , and both then - nhs decreased significantly after injection with 4 + 107 spores / ml 若虫和10日龄雌成虫对绿僵菌孢子比较敏感，注射4 10 ~ 7个/ ml浓度的孢子后其血细胞数量均降低显著，最低时分别为空白对照的4 . 6及8 . 5 。
8.
The results showed that there are 5 generations of this insect pest per year in guangdong province , the adult of first generation occurs in march , and the nymphs and pupae overwinter since middle or late november 该虫在广东一般1年发生5代，第1代成虫出现于3月份， 11月中下旬以后若虫和蛹开始越冬；发育起点温度为11 . 01 ，完成1个世代所需有效积温为791 . 27日度。
9.
In choice test , all females from four populations reared on both 200n and 0n rice plants preferred significantly to feed and oviposite on plants with high nitrogen content , while no marked difference in nymph feeding preference was found among the rice plants 结果表明，无论褐飞虱饲养在高氮和低氮稻株上其雌成虫均显著偏爱在含氮量高的稻株上取食和产卵，而若虫对不同含氮量稻株的取食选择性无显著差异。
10.
On the basis of foreign documents , the dissertation firstly describes the morphology , taxonomy , and biological characters of cochineal insects . then , by using artificial climate cases in the lab , according to orthogonal design , 8 lands of combinations of temperature , humidity and light is set , while the temperature has four levels : 15 , 20 , 25 and 30 , and the relative humidity has two levels : 60 % and 80 % , while the light also has two levels : 980 lux and 60 lux . through observations and analysis of hatching percentage , survival percentage of the first instar and during from the second instar to the adult , the population tendency index , generation life cycle , size and eggs of female adult , the development of the cochineal under different conditions is studied 在收集、整理国外对胭脂虫的研究资料基础上，首先从胭脂虫的形态学、分类学、生物学特性入手，进而在实验室内利用人工气候箱，应用正交设计方法，设计了4种温度、 2种湿度、 2种光照梯度的不同组合，通过测定胭脂虫的孵化率、 1龄若虫的存活率、 2龄若虫至成虫期存活率、种群趋势指数、世代历期、雌成虫的大小、怀卵量等生物学指标，深入研究胭脂虫在这些组合下的生长发育状况，应用数理统计方法，分析出温度、湿度和光照对各项生物学指标的影响，找出胭脂虫适宜的室内培育条件，并为野外胭脂虫的培育提供一定的理论依据。
