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Old 06-10-2011, 04:42 AM   #1
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Default mbt work shoes men 尺蛾科

尺蛾科身体小至大形,比较粗壮,前后翅面广大,但翅较薄,静止时平展在身体两侧。尺蛾的幼虫又称为“尺蠖” ,俗称“步曲虫”或“弓腰虫”。其腹部只在第6节和末节上各有1对足,举动时身体一屈一伸,犹如人用手量尺 一样,尺蛾即由此而得名。休息时用腹足固定,身体前面部门伸直,与植物成一角度,拟态如动物的枝条。本科昆 虫散布很广,约有万种以上。中国有1000多种。大都是农林业的害虫。

目录
基本材料种类形态描述生物学描述分类及分布分别与鉴定研究进展 基本资料  中文名称:尺蛾科
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  鳞翅目:Lepidoptera   ID号:85BZ   拉丁文名称:Geometridae Leach, 1815种类  中国主要的种类有:   核桃星尺蛾,幼虫为多食性,为害核桃最重大;
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  柿星尺蛾,为害木�、核桃、柿等;   木�尺蛾,为害多种林木跟果树,以柿为明显;   棉大造桥虫,食性很杂,从前在长江流域棉区曾经猖狂成灾;   油茶尺蠖,为害茶和油茶树;桑尺蠖,为害桑树;   槐尺蠖,又叫吊逝世鬼,为害中国槐;   沙枣尺蠖,又名榆尺蠖、柳尺蠖或杨尺蠖,为害沙枣、柳、杨、榆、苹果、梨等;   梨尺蠖,又名枣步曲,是枣树的重关键虫。状态描写  尺蛾科是鳞翅目中仅次于夜蛾科的大科,台湾已知的 种类约有700种以上。成虫身材通常细微,翅膀宽薄,触角外形多变。成虫大局部夜行性,有区光性,但有少数 品种会在白天
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运动。有些种类的雌虫没有翅膀或退化,而无法飞翔。   小到大型,通常中型的蛾子。身体个别细长,翅宽,常有细涟漪,少数种类雌蛾翅退化或消散。通常无单眼, 毛隆小。喙发达。前翅可有1-2个副室,R5与R3、R4共柄,mbt shuguli black,M2通常凑近M1,但也有的居中。后翅Sc基部常强烈曲折,与Rs靠近或部分合并。鼓膜器位于第1腹板两 侧。   幼虫只存在第6、10对腹脚,极少数的种类在第五节还有脚的痕迹。挪动时,幼虫会先将尾端向前移,弓起 身体,而后再将前半身抬起往前移,看起来就像是用尺在测量货色一样,十分有趣。幼虫主要取食各类的植物,然 而在夏威夷也有发现肉食性波尺蛾亚科Larentiinae的幼虫。   卵大多卧式,但在一些种类中为破式。从侧面观,卵通常为椭圆形或钝卵形。   幼虫修长,通常仅第6节和第10节具腹足,行为时一曲一伸,故称尺蠖、步曲或造桥虫,通常似植物枝条。 生物学描述  大都是农林业的害虫。幼虫寄主植物普遍,但通常取食树木和灌木的叶片
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,很多是森林和果树害虫。翱翔力不强,少数种的雌蛾翅退化。除少数种外,普通具喙和翅缰。幼虫 体形如树枝。   中国重要的种类有:核桃星尺蛾,幼虫为多食性,为害核桃最严峻;柿星尺蛾,为害木�、核桃、柿等;木� 尺蛾,为害多种林木和果树,以柿为显著;棉大造桥虫,食性很杂。   过去在长江流域棉区曾经猖獗成灾;油茶尺蠖,为害茶和油茶树;桑尺蠖,为害桑树;槐尺蠖,又叫吊死鬼, 为害中国槐;沙枣尺蠖,amazon uk shoes mbts,又名榆尺蠖、柳尺蠖或杨尺蠖,为害沙枣、柳、杨、榆、苹果、梨等;梨尺蠖,又名梨步曲,是梨树的重要害虫 枣尺蠖,又名枣步曲,是枣树的重要害虫。分类及分布  本科是鳞翅目中最大的科之一,已知种类至少有210 00种。中国有2000种左右。本科目前分6个亚科。分离与鉴定  基本上仍采用传统的分类方法,即依据外 部形态与内部结构等形态特点进行
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鉴定,但这种方式往往会碰到一些较 难解决的问题,mbt kisumu blue 2011春节海口打球记,如近缘种、姊妹种的辨别。同时传统分类学对一些属的划分,因为分类学家对动物形态、性状的控制和懂得不同 ,结果对种类的 归属见解不一。这时采取新的分类手腕联合传统分类学进行综合分类,能更好的解决这些问题。   近些年来,跟着人们对同工酶的意识和研究,利用同工酶的分类方法可以解决上述问题。 同工酶是在生物体内构造不同,但催化作用雷同的一组酶。同工酶是由蛋白质组成的,而蛋白质是在遗传基因节制 下合成的,因而,同工酶可以反应生物的遗传实质。   同工酶分类研究办法中,电泳法取得的结果与传统分类成果基础上一致,而且还能够辨别那些用传统分类方法 无奈判断的种类。同时,同工酶在研讨体系发育、亲缘关联、遗传多样性及生物进化水平等也是一种极为有用的方 。用聚丙烯酰胺凝胶电泳法,对陕西地域鳞翅目尺蛾科(Geomti- dae)种类进行了EST同工酶的电游分析研究。   一、同种个体间EST同工酶的比拟 比较剖析了11种的同种个体EST同工酶,结果是这11种个体间的酶谱均可分四到五组,可能是由四到五个基 因位点把持。同种个体间的酶谱存在着必定的差别,但这种差异绝对较小,往往是少数个体存在着 差异,而多数个体占有着基原形同的酶谱,斗子文,阐明在统一种个体间在某些等位基因上有较高的频率呈现。   尺蛾科   二、不同发育阶段的比较,通过对尺蛾科进四个发育阶段的比较,结果发明尺蛾
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科不同阶段肪T 同工酶存在着一定的差异。早期拗虫酶带数量相对较少,但各阶段所出现的酶带地位根本相同,解释 EST同工酶在发育进程中是逐步向完整的方向表白的。另外,通过各阶段酶谱的比较,还发现尺蛾科各发育阶段 的酶活性不同,其中晚期拗虫和蛹的酶活性最强,成虫次之,早期拗虫酶活性最弱。   三、不同体段和不同性别比较尺蛾科不同体段EST同工酶比较结果表明,不同体段间EST 同工酶基本上不差异,mbt work shoes men,只是腹部的酶含量相对要大一些。不同性别之 间的EST存在着一定的差异,且这种差异要大于同一性别间的差异,这种差异是否是性连锁还不能断定。结果还 表明雌性的酶活性往往大于雄性的酶活性。由上述三方面可以说明,在进行分类比较时,应尽可能采用同一发育时 代,同一性别的个体来进行比较。   四、硒酶同工酶的分类价值比较分析了三个属的不同种fq的EST同工酶。同一属不同种问EST同工酶存 在着一定的类似性和较为稳固的差异,差异重要表示在某些一种所领有的酶带而另一种内没有,这说明不同种之间 有着不同的等位基因。同时不同种在不同的酶带上有较高频率涌现。因此,酯酶同1 酶在这二科初级阶元有重要分类价值。 另外;对尺蛾科16种泳功率Rf值进了聚类分析,结果同传统分类学基本一致。研究进展  应用尺蛾科昆虫性 信息素治理害虫已在水稻、棉花和槐树等作物中运用,并且获得
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了显明的防治后果。固然尺蛾类昆虫性信息素的应用目前仍停留在试验室阶段,但是随着研究的深刻,利用性信息 素管理该类害虫将为期不远。   尺蛾科昆虫三级养分关系的研究不仅为说明昆虫、寄主以及天敌之间的协同进化关系供给重要的迷信根据,而 且也为改良和利用天敌掌握害虫开辟了新的道路。茶尺蠖取食时的口腔分泌物中互利素开释启动子的发现和茉莉酸 甲酯等外源诱导化合物的应用使人为模拟昆虫取食伤害成为可能,可用于研究植物引诱防备反映发生的机制,发现 拥有生物防治意思的新基因。   另一方面,在利用天敌的传统生物防治方法中,天敌疏散是一个难以战胜的问题,尺蛾类昆虫迫害后产生的挥 发性互利素的研究与应用,不仅能在田间勾引天敌凑集,而且人工释放天敌的分散问题也被解决,从而强化了对尺 蛾科的天然控制,具备辽阔的应用远景。 词条图册更多图册 开放分类: 生物,昆虫,做作,鳞翅目,动物 “尺蛾科”相干词条:
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Old 06-10-2011, 05:00 AM   #2
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