对幼虫的生物活性，均随虫龄的增加而下降，且集琦虫螨克的活性远比菜喜高。
The larvicidal activity of avermectin was significantly higher than that of spinosad, and both decreased with increase of the larval age.
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.
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.
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.
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。
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.
用此感染性虫卵悬液通过泄殖腔和口腔接种感染4周龄的火鸡、未培育的新鲜虫卵和异刺线虫雌虫感染火鸡、以及来自三个地方的蚯蚓感染火鸡相对比。
The 4-week-old turkeys were infect by the suspension of infectious eggs through the cloaca and oral infection, contrast to oral infection with the Heterakis fresh egg, female Heterakis and earthworms.
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' at 1 age nymphal stage, 2 age nymphal initial stage of scale louse, its results will improve greatly.
一个有三五年网龄的网友，不会不知道珊瑚虫给我们带来如此多实用便捷的功能。
One has the netizen of 35 years of net age, won't not know anthozoan is brought to us so many practical and convenient function.
性信息素的滴度随着雌虫日龄的增减而减少，最高值为当日羽化雌虫的腺体提取物。
The pheromone titer during the calling period decreased significantly with age, being highest in extracts from newly emerged females.
但少数品种随着苗龄的增大，其抗虫性有不同程度的提高。
However, the resistant level in a few of rice varieties increased along with the increase of plant age.
但少数品种随着苗龄的增大，其抗虫性有不同程度的提高。
However, the resistant level in a few of rice varieties increased along with the increase of plant age.
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