英语释义

• an insect or other arthropod between molts

片语

instar distinguishing分龄

Instar Electromechanical英士达机电

d instar龄

early instar稚蚕期

best instar最适龄期

second instar龄

earlier instar稚蚕期

ad instar仿效

英汉例句

• when reared on bolls with increased n content, the bollworm had higher dry weight in the 6th instar larvae and at the same time, the assimilation efficiency of food was enhanced.

  用含氮量显着不同的幼铃饲喂棉铃虫时，高氮食物使6龄幼虫的干重增长，同时食物利用率提高。

• the result of field trial showed that 18% shachongshuang spray-drop solutions had good control effect when it was used in the peak stage of chilo suppressalis (walker)1~2 instar in rice field.

  试验结果表明，18％杀虫双撒滴剂在水稻田二化螟1～2龄高峰期进行防治，具有优良的防治效果。

• the experimental results reveal that the infective mortality of larva microsporidiosis reduces with the increase of larva instar and increases with the increase of spore concentration.

  试验结果表明：幼虫感染微孢子虫病的死亡率随幼虫龄期的增大而减弱，随孢子浓度的增加而增大。

• by testing larva body-length and head-width, the result showed that the major index of distinguish instar was according as head-width.

  试验对各龄期幼虫的体长、头宽进行测量，得出以头宽作为主要指标来鑒别虫龄比较準确。

• natural survival rate of eggs and the various instar larvae in different years were also investigated.

  并观察了不同年份棉铃虫卵和各龄幼虫的自然存活率。

• the suitable time for shachongdan application is at peak stage of young nymphs for rice planthopper, and egg stage to 2rd instar for striped rice borer and rice leaf roller.

  用药时间宜早不宜迟，防治二化螟、稻纵卷叶螟应掌握在卵孵高峰至2龄初期用药；防治稻虱应掌握在低龄若虫高峰期用药。

• with 8th instar nymphs, the critical period for regeneration was from 20 to 26 days-old.

  以8龄若虫为研究对象，发现其再生临界期为20~26日龄。

• it was showed that high mortalities in the stages of egg(13 5%), 1st instar larvae(18 2%)and pupae(19 0%) were the main factors influencing the growth of the experimental population.

  结果表明，卵期、1龄幼虫期、蛹期的死亡率较大，分别为13 5 %、18 2 %和19 0 % ，是影响种群数量增长的主要因子。

• however, the initiation time of post winter feeding was obviously different among these instars, larvae in 4th instar beginning feeding earliest.

  但取食的开始时间在龄期之间具明显差异，以4龄个体最早取食。

• fecundity of females that the males (♂t) developed from 5th instar nymphs treated with lc50 deltamethrin were mated with treated females (♀t) was significantly higher than that of other mating pairs.

  溴氰菊酯lc50处理的5龄若虫羽化的雄虫与处理雌虫配对的雌虫产卵量组合显着高于其他三个组合。

• the change of protein content was about triple of the weight change during the 5~th instar of silkworm, bombyx mori, and the protein content was rapidly increased between the 3rd and 4th day.

  家蚕幼虫5龄期间蛋白质含量的变化约为体重变化的3倍，整个蚕体的蛋白质含量在第3和第4天之间有一个明显的突增。

• various corn borer microsporozoites were used to feed and soak dendrolimus honi larvae at the instar of 1,2,4 and 7 for infecting them.

  用不同浓度的玉米螟微孢子虫悬浮液，饲喂及浸泡感染1、2、4、7龄云南松毛虫幼虫。

• the stages of egg, larva of instar 1 to 4, pupa, and the whole generation were influenced greatly by temperature.

  对于不同的生活史阶段，豆荚野螟卵、1～4龄幼虫、蛹及整个世代受温度影响显着；

• damage amount and damage loss to cotton by the various instar larvae of cotton bollworm, helicoverpa armigera were got through inoculating larvae to cotton plant.

  通过人工接虫为害，获得了棉铃虫各龄期幼虫在棉花上的为害量和为害损失。

• the parasitizing rate and pupae weight which were bred in the larvae of the 1st instar were the lowest but the mortality rate after parasitizing was the highest.

  寄生蜂对1龄寄主幼虫的寄生率以及1龄粘虫育出的茧重均是三个龄期寄主中最小的，但死亡率却是三者间最高的。

• most small rice grasshopper, oxya chinensis(thunbery), in first and second instar chiefly ate the grasses at place of oviposition, and ate little rice.

  中华稻蝗在第一、二龄期主要在产卵场所取食杂草，很少取食水稻。

• in contrast, the temperature did not distinctly influence the survival of both 3rd and 5th instar larvae.

  温度对3龄幼虫取食、生长和存活无显着影响，但对5龄幼虫的取食和体重增长则有显着影响。

• the enzyme activity of the 5th instar was the highest and that of the pupa was the lowest.

  结果表明，不同虫态及虫龄的多酚氧化酶活力有很大的不同，其中以5龄幼虫酶活力最高，蛹酶活力最低。

• significant difference was found in development duration of the 3rd instar of parasitized larvae and unparasitized larvae.

  被寄生的3龄幼虫与未被寄生的发育历期差异达极显着水平。

• in experimental populations, mortalities of the 5th instar larvae and pupae were higher than those of instars at initial stages.

  实验种群中初期死亡率较低，5龄幼虫和蛹的死亡率较高。

• our studies revealed the larvicidal efficiency of both the oils against 4th instar larvae of ae. aegypti, the pine oil proving to be more effective than the cinnamon oil.

  结果表明：两种油对埃及伊蚊4龄幼虫均具有毒杀作用，且松油的灭幼效果优于桂皮油。

• the parasitized dbm larvae had prolonged their 4th instar duration obviously, and the later the larva had been parasitized, the longer this extended duration became.

  小菜蛾幼虫被寄生后，其4龄发育历期较未被寄生的显着长，且寄生时龄期越大4龄历期延长越多。

• the host selectivity was tested by suppling host larvae with different instar .

  通过供给不同龄期的寄主幼虫的方法研究蜂对寄主的选择性。

• the results showed that; (1)mh comes into antagonism with ajh, but jh doesn't antagonize ajh in the 2nd , 3rd and 4th instar larvae treated by the hormones.

  结果表明：（1）2龄、3龄和4龄蚕应用外源激素处理，ajh与mh之间存在明显的拮抗关系；而ajh与jh间未表现出拮抗关系。

• kecanjun concentrations in the 5th instar healthy silkworms plasma was detected by the microbiologic assay.

  采用微生物法测定5龄健康家蚕食下克蚕菌后的经时过程血药浓度。