查询词典 bollworm

The cotton bollworm, Helicoverpa ormigera(Lepidoptera: Noctuidae), is a worldwide pest.

棉铃虫属鳞翅目夜蛾科，广泛分布于南北纬50度之间，是一种世界范围的重要农业害虫。

Due to the lack of data, the parameter of forecasting emergence of regional CBW is built by the traditional phenological model. With the standard of this, model parameter of forecasting occurrence of regional cotton bollworm is applied.

由于数据缺乏，采用传统有效积温的方法，建立了区域性棉铃虫羽化预测的参数，以此为标准，建立区域性棉铃虫发生期预测的模型参数。

The enzyme activity of cotton bollworm was indicated; after 144 hours teated with the subthal dose (LC50) of the pesticiedes, the difference was detected in the GSTs activities when compared with contrast.

酶动力学研究表明：用4种药剂的亚致死浓度LC50剂量处理棉铃虫3龄幼虫，在药剂处理后的144h内，幼虫GSTs活性发育变化规律与对照有一定的差异。

Predacious and parasitic natural enemies had strong conjoint control effect to both second and third generation, therefore considerably reduced the population trend indices of cotton bollworm.

用目测法研究了转Bt基因抗虫棉对棉铃虫的控制效率，结果表明转Bt基因抗虫棉对棉铃虫有很高防效。

The biological character of the cotton bollworm suggested that it had 3 generations a year, and hibernates with pupa, its larva did harm to the browse, group top, top, tip, flower and boll, the harmful period was about 70 days.

棉田棉铃虫的生物学特性结果表明：棉铃虫在棉田一年发生三代，以蛹越冬，越冬代成虫始见期6月19日，9月中下旬老熟幼虫落入土中化蛹越冬。

Other data indicate that the block冬耕winter irrigation, cotton bollworm overwintering pupae in about 80% of mortality, not only cultivated the land irrigated winter mortality rate of 60% to 70%, non-cultivated non-irrigated land, only 30% of the ~ 40

另有资料表明，冬耕冬灌的地块，棉铃虫蛹越冬死亡率在80%左右，只耕不灌的地块越冬死亡率为60%～70%，不耕不灌的地块只有30%～40

On the condition of complementary nutrition at the adult stage, the average egg numbers oviposited by one female of cotton bollworm which fed cotton leaf, cotton boll and artificial diet at.

在成虫期有补充营养条件下，幼期取食棉叶、棉铃和人工饲料个体的平均单雌产卵量分别为565.2、1005.8和1052.2粒；成虫期无补充营养，则单雌产卵量依次为162.2、400.6和1035.6粒。

This result is consistent with the result come from PCRfingerprinting method. The results of the two methods indicate that maize, soybeanand castor-oil plant can act as refuges of Bt sensitive cotton bollworm as non-Btcotton; while sesame and peanut may not.

第三代棉铃虫的六个寄主种群间存在一定的遗传差异；其中，花生种群与其他种群间没有明显的基因交流，遗传分化比较明显；Bt棉上的棉铃虫与普通棉花、大豆、玉米上的棉铃虫敏感种群间基因交流频繁；而与花生、芝麻上的棉铃虫敏感种群间的基因流均不显著，说明它们间有可能不能进行随机交配。

This paper analyzed the dynamics of the number and spatial niches of cotton bollworm predators in the fields, and then constructed predators evaluated model considering the number, temporal and spatial niches of natural enemy at the same time.

在分析棉田捕食性天敌数量变化及空间动态的基础上，综合考虑捕食性天敌的数量、天敌与棉铃虫的空间生态位重叠度和时间发生上的同步性，建立了棉铃虫捕食性天敌控制作用的评价模型。

It was notonly the need for forecast, but also gived the theoritical base of the tactics to controlthe cotton bollworm in cotton fields.

这不仅是棉铃虫测报工作的需要，更为有效地控制棉田中的棉铃虫提供理论依据。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。