如何消灭结草虫

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结草虫是一种飞蛾，在幼虫阶段主要以灌木和树木为食。它们喜欢吃落叶乔木、针叶树、果树和多年生花卉。不过，它们只会对不落叶的针叶树造成致命威胁。消灭结草虫的主要方法有在其生长的特定阶段手动消灭，以及利用杀虫剂进行灭杀。

部分 1
部分 1 的 3:

观察结草虫

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    结草虫的卵囊是褐色的，长约3.5-5厘米。它们身上会裹一层干枯的针叶，在其它绿色针叶的衬托下非常显眼。
    • 结草虫卵囊不太容易被发现，因为它们看起来非常像松果。所以要仔细查看松果，看看里面是否藏着结草虫。
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    不要把残叶放在混合肥里，因为结草虫的幼虫可能会在里面存活。你可以用塑料袋密封好，然后扔到垃圾堆里。
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    如果松树开始变成褐色，就说明结草虫可能已经把它给毁了。这时候，你得尽量把整个花园的虫子都清除干净，以免波及其它的树。
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    它们的丝可能会被风吹走，而院子里任何风吹得到的地方都可能变成它们的藏身之处，所以一定要仔细查看。
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部分 2
部分 2 的 3:

杀死结草虫的卵

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    用钳子可以把结草虫留下的任何蛛丝马迹都全部剪掉，这样它们就不太可能再卷土重来了。 [1]
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    注意一定要把它们完全浸在水中。
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    如果能用这种手工方法彻底消灭卵囊，就可以少用杀虫剂。
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部分 3
部分 3 的 3:

杀死孵出来的结草虫

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    这是它们孵化的时间，也是它们最脆弱的时候。但在有的地方，它们会等到六月份才开始孵化。 [2]
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    不过，当它们受到惊吓时会缩回卵囊里。
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    这些杀虫剂中含有一种叫做苏云金芽孢杆菌的物质，可以杀死结草虫的幼虫。如果多棵树都有虫患，你得用杀虫剂才能彻底灭虫，当然费用也较高。 [3]
    • 其它杀虫剂，比如如Orthene、Talstar 和Tempo，也可以有效灭杀刚孵出来的结草虫。 [4]
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    把被感染的叶子和针叶彻底喷湿。注意，如果附近有宠物和小孩，喷杀虫剂时要小心。
    • 喷药后可以把这片区域隔离起来。
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    这样可以杀死结草虫的低龄幼虫。要是到了七月下旬和八月份的时候，结草虫就有了抗药性，杀虫剂也就不再管用了。
    • 九月份和十月上旬，成年结草虫的虫卵开始受精，这时候你就可以动手搜寻卵囊了。
    • 成年雄性结草虫是有着黑色翅膀和褐色斑点的飞蛾，它们在授精后就会死亡。而雌性结草虫会留在卵囊内，处于幼虫状态。
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你可能需要

  • 塑料桶
  • 水
  • 洗洁精
  • 园艺手套
  • 钳子
  • 杀虫剂
  • 塑料袋
  • 耙子

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参考

  1. ↑ http://www.weekendgardener.net/blog/2012/02/organic-control-of-bagworms.htm
  2. ↑ http://www.gardeningknowhow.com/plant-problems/pests/treatment-bagworms.htm
  3. ↑ http://lancaster.unl.edu/hort/bagworms.shtml
  4. ↑ http://www.domyownpestcontrol.com/bagworm-control-a-425.html

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