虫龄

Bt可湿性粉剂对小菜蛾不同虫龄幼虫的毒力随着虫龄的增长而降低，不同虫龄之间差异显著；

The toxicity of Bt soluble powder to the different instar larvae of DBM decreased with the instar development , it indicated great difference among different instar .

草蛉幼虫各虫龄对棉蚜的捕食功能反应均符合HollingⅡ型。

Predatory functional response of C. sinica each instar larva was consistent with Holling ⅱ model pattern .

RM、RD和S品系的CarE水平在幼虫期随虫龄增长而增高。

CarE levels in RM , RD and S strains increased with age in the larval stages .

方法采用联合法将虫龄为24d的日本血吸虫成虫细胞接种于小盖玻片上，培养于常规培养基中。

Methods The cells from S. japonicum were inoculated on the small glass cover slips .

真菌对幼虫的感染率与孢子浓度成正比，虫龄越大，幼虫越不易被真菌感染。

The bigger the instar was , the larvae were lessly infected .

温度和寄主虫龄对单白绵绒茧蜂生长发育的影响

Shopping list influence of temperature and host age on the development of Apanteles

结果表明，禾缢管蚜翅型分化的敏感虫龄为3龄若蚜；

The results showed that sensitive instar on production of alatae was 3rd nymph .

孵化后的蜂幼虫经历一次明显的蜕皮，明显存在两个虫龄。

After hatching , the larvae undergoes a obviously molting , it has two larval instars .

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鉴别虫龄比较准确。

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

结果表明：幼虫对饲料中氮的吸收能力随虫龄增加而下降，对糖的吸收能力则随之而增强；

The results showed that the absorption of nitrogen decreased hile that of sugar increased with larval development from the third to fifth instar .

不同虫龄的初龄若虫断去触角蜕皮后均能通过再生使触角的节数增加。

The different instars nymph at the beginning of age was able to regenerate and increase the antenna segments number after antenna amputated and ecdysised .

在同一低浓度下，随着虫龄增加，致死时间明显延长，高浓度下，致死时间与龄期增加无明显相关性。

The lethal duration of Chilo suppressalis under lower concentration of tebufenozide was shortened with the increase of larva instar , but was not shortened under higher concentration .

目的通过扫描电镜观察丰宫并殖吸虫的后尾蚴、不同虫龄的成虫和虫卵，为鉴别虫种提供资料。

Objective To identify the species of Paragonimus proliferus with scanning electron microscopy ( SEM ) based on the surface structure of excysted metacercariae , adult worms and eggs .

感染血吸虫的家兔，在血吸虫发育的早期成虫阶段（25&35d虫龄），采用吡喹酮100mg/kg顿服治疗。

Domestic rabbits infected with schistosomiasis were treated with a single dose of 100mg / kg of praziquantel in the early growing stage of adult schistosome ( worm age 25-35d ) .

幼虫饲毒后，致死中时（LT（50））随病毒浓度提高而缩短；随饲毒时虫龄的增大而延长。

The median lethal time ( LT50 ) of the GV was shortened with the increase of the virus concentration and the decrease of the larval instar , during which the GV was fed .

转Bt基因棉花对棉铃虫不同龄期幼虫的杀虫活性和抑制生长作用

Survival and growth of different instar larvae of Helicoverpa armigera ( hubner ) on transgenic Bt cotton

棉铃虫4龄幼虫的摄食行为和中肠蛋白酶活性的变化

Changes of feeding behavior and midgut protease activities of larval Helicoverpa armigera during the fourth instar

掌握在蚧虫1龄若虫、2龄若虫初喷药，可大大提高“灭蚧灵”的杀虫效果。

When we apply'Mie Jie Ling'at1 age nymphal stage , 2 age nymphal initial stage of scale louse , its results will improve greatly .

生测结果表明，导致棉铃虫6龄幼虫和蛹100%死亡的致死高温分别为52.5℃和50.9℃；

The bioassay showed that all the 6th instar larvae and the developing pupae of Helicoverpa armigera ( Hubner ) would be killed at 52.5 ℃ and 50.9 ℃ for 1 h , respectively .

棉铃虫六龄幼虫经非甾醇类蜕皮激素竞争物（RH2485）饲喂处理后，取部分组织做酶/蛋白检测以及切片光镜观察。

After 6th instar larva Helicoverpa armigera was fed on non steroidal ecdysone agonist RH 2485 , proteins and esterases in some tissues of them were examined , and the slices of body wall were observed with optical microscopes .

该虫以3-4龄若虫在土壤、稻茬、小麦根部、枯枝、杂草等场所越冬，3月份温度升高后越冬代若虫开始活动。

They overwintered in 3-4 instar nympha in the soil , root of wheat , stubble , fallen leaves , weeds and other places .

结果表明：绿盲蝽的敏感虫态为1龄若虫；

The results indicated that the1st instar larvae of A.lucorum was the sensitive stage .

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。

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

结果表明：丁纹豹蛛对棉蚜和棉叶蝉不存在喜好性；对棉小造桥虫2、3龄幼虫存在着负喜好性；

The results showed that it is not preference to the Aphid gossypii and Chlorita biguttula , To Anomis flava instar 2 and 3 present negative preference .

不同虫态及虫龄的血清和血细胞中酚氧化酶活力有很大的不同，血清和血细胞中酚氧化酶活力变化规律一致。

The enzyme activity in plasma or haemocytes was different at different stages and instars , but the change trend of the enzyme activity in plasma and haemocytes was consistent .

结果发现：黄牛自然感染率高达100%，虫负荷与牛龄及性别无显著性差异（P>0.05）。

It was found that the infection rate of cattle in nature reach up to 100 % , no significant difference between worm burden and cattle ages and sex ( P > 0.05 );

供试虫以玉米螟2龄幼虫为佳，采用候选苏云金杆菌制剂混入半人工混合饲料中接虫感染的方法，结果准确，操作简使，完成一次测定需时3天，标准差为15.49%。

The 2nd instar larvae would be the best stage to be tested when the Bt preparations mixed into the artificial medium , the results would be more accuracy . The method was simple and can be done easily . Only 3 days period was needed in once test .

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。

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 .

本文研究了升高环境温度对小粉虫（Alphitobiusdiaperinus，鞘翅目拟步行虫总科）末龄幼虫、蛹以及成虫的失水和热敏性（临界热极值，Criticalthermalmaximum，CTmax）的影响。

Effect of increasing ambient temperature on water loss and thermosensibility ( critical thermal maximum , CT max ) was examined in last instar larvae , pupae and adults of Alphitobius diaperinus ( Coleoptera : Tenebrionidae ) .