查询词典 instars

In addition,parasitism could induce supernumerary instars in some young B.mori larvae.

部分被寄生的低龄家蚕还出现了龄期增加的现象，即经历了六龄才结茧化蛹。

The spiraling whitefly Aleurodicus dispersus Russell(Homoptera: Aleyrodidae)is a new invasive pest. Aggregation intensity index and geostatistics methods were used to analyze the spatial distribution pattern of its eggs, 2~ 4 instars nymphs and adults on Bauhinia variegata L in Danzhou, Hainan.

螺旋粉虱是一种新的入侵害虫，应用聚集强度指数和地学统计学研究其卵、2～4龄若虫和成虫在海南岛儋州地区羊蹄甲（Bauhinia variegata L。

There are three instars in the nymphal stages.The mean developmental period from egg to adult was 24.5 days.

从卵发育至成虫平均需24.5d，其中卵期平均9.0d、一龄若虫平均7.4d、二龄若虫平均3.8d、三龄若虫3.5d。

At 25℃, eggs hatched after 3.69±0.25 days, the nymph had three instars, the 1st instar stage was 3～5 days, 2nd instar 3～5days, and 3rd instar 4～5 days; The prepupal stage lasted 8～14 days and the pupal stage lasted 10～15 days at 25℃.

2黑广肩步甲成虫人工饲料研究分别研制了9种成虫人工饲料，以此饲喂黑广肩步甲成虫，结果表明，饲料Ⅲ是室内饲养黑广肩步甲成虫的最佳饲料。

The 3rd instars larva began to pupate in the middle ten days of May. The pupa stage could last for 8-9 days.

从卵到成虫，种群在0°方向上的相关程为21.4-42.7 m，在90°方向上的相关程为

The results showed that no obvious contact toxicities against the 3rd instars larvae of Mythimna separata Walker were observed in all treatment, and only the extract of Euonymus japonicus exhibited notable stomach toxicity.

采用微量点滴法和载毒叶片饲喂法测定30种药用植物乙醇提取物对粘虫3龄幼虫的触杀、胃毒以及拒食活性，结果表明供试样品在50 mg﹒mL~(-1)浓度下，冬青卫矛Euonymus japonicus Thunb。

Microscope examination showed that whitefly occurred in Beijing was B. tabaci rather than T. vaporariorium by vasiform orifice characters of the fourth instars.

根据北京重发区粉虱的形态特征，表明该粉虱应属烟粉虱，主要的鉴别特征是它们的四龄若虫腹背瓶形孔构造。

The skipping characteristics of the 3～5 instars were investigated.

首先测量分析了主要危害种群的三到五龄蝗虫的跳跃特性。

The food consumption in 5-6 instars accounted to 81.8% of the total larva phase.

结论］2代思茅松毛虫的防治最佳时期都是在4龄以前。

Moreover, the isozyme of larvaes in different instars and adults with different sex were also different.

结论］不同发育时期黑色型黄粉虫的酯酶和过氧化物酶同工酶存在差异，表现出不同的生理特征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。