蚊幼虫

The empty Brazil nut pods collect rainwater and become the home for many organisms, including the tadpole, mayfly larva and mosquito larva

空的巴西坚果荚收集了雨水，并成为许多生物的家，包括蝌蚪，蜉蝣幼虫和蚊幼虫

The empty Brazil nut pods collect rainwater and become the home for many organisms, including the tadpole, mayfly larva and mosquito larva right

空的巴西坚果荚收集了雨水，并成为许多生物的家，包括蝌蚪，蜉蝣幼虫和蚊幼虫' l！

This might be a part of the killing mechanism to Culex quinquefasciatus larvae.

这可能是影响蚊幼虫正常生命活动以致死亡的重要原因。

Objective To investigate the killing effects of different extracts of Euphorbia kansui Liou Mass and Dryopteris Crossirhizomz on mosquito larva.

目的 了解甘遂和贯众不同提取液对蚊幼虫杀伤的作用。

Any of various small livebearers of the genus Gambusia that feed on mosquito larvae and are often used in mosquito control.

食蚊鱼一种食蚊鱼属主食蚊幼虫的卵生鱼，常被用于控制蚊子的生长

Any of various small livebearers of the genus Gambusia that ''.'feed'.'' on mosquito larvae and are often used in mosquito ''.

食蚊鱼一种食蚊鱼属主食蚊幼虫的卵生鱼，常被用于''。

As mosquito larvae control agents, the predatory capacity of Gambusia affinis and Poecilia reticulata is limited. This study was designed to compare a Taiwan native larvivorous fish, Macropodus opercularis, with G.

利用大肚鱼、孔雀鱼防治病媒蚊幼虫已有相当的历史，但常受环境的影响而限制其应用。

Methods:To select the nature habitant of mosquito larva density,to spray the pesticides to the water.

选择野外具有一定蚊幼虫和蛹密度的滋生场所，采用液体喷雾方法，水面喷雾施药，观察蚊幼虫和蛹的下降率；同时观察水生植物和鱼类的死亡等影响因素。

As Bs grows, it produces binary toxin, Mtx and Cry48Aa/Cry49A, which have specific toxic effects on a variety of mosquito larvae. It is hence widely used in biological vector and mosquito control and considered a larvicidal solution that is non-toxic to human, animal, poultry and aquatic life and environmentally friendly.

Bs在生长发育过程中能产生对不同蚊幼虫具有特异性毒杀作用的二元毒素、Mtx毒素和Cry48Aa/Cry49A毒素，广泛应用于病媒蚊虫的生物控制中，被认为是一种对人、畜、禽、水生生物无毒，不污染环境的生物杀蚊幼制剂。

However, they have their respective shortcomings in mosquitocidal spectrum, persisting and resist-mosquito management. In this research, the mosquitocidal toxin genes cry4Ba and cry11Aa from Bacillus thuringiensis and btx gene from Bacillus sphaericus were co-expressed.cry4Aa,cry4Ba and cry11Aa genes were also co-expressed with btx gene seperatedly and in combination.The constructed recombinants had a high toxicity against susceptible and resistant mosquito.

本研究将苏云金杆菌以色列亚种的杀蚊毒素基因cry4Ba和cry11Aa与球形芽胞杆菌的二元毒素基因btx两种杀蚊菌的杀蚊毒素基因进行了重组，将Bti杀蚊毒素基因cry4Aa， cry4Ba， cry11Aa及Bs的杀蚊毒素基因btx单独或组合表达，所得工程菌株对敏感和抗性库蚊的毒力均有提高，不仅提高了杀蚊毒力，扩大了杀蚊谱，而且部分克服了蚊幼虫对Bs的抗性。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。