用户名: 密码: 验证码:    注册 | 忘记密码?
首页|听力资源|每日听力|网络电台|在线词典|听力论坛|下载频道|部落家园|在线背单词|双语阅读|在线听写|普特网校

VOA慢速[农业报道]农作物中的化学试剂真的对蜜蜂有危害么?

2015-06-12    来源:普特英语听力    【      美国外教 在线口语培训
— 查看译文 —

tips:怎样阅读才是有质量的阅读了? 中英对照请点击【中英对照】查看译文请点击 【查看译文】进行核对。


A new study says a widely-used insecticide is damaging wild bee populations. Wild bees are important, because they pollinate crops and wild plants.

Environmentalists in the United States and Europe say chemicals called neonicotinoids are causing a drop in the number of bees.

These insecticides are among the most commonly-used worldwide. Farmers often use seeds treated with the insecticides.

The chemicals target insects that eat crops, and they do not spread beyond the field. But they do get into pollen and nectar, which is where the bees come into contact with them.

Maj Rudlof is a researcher at Lund University in Sweden. She led the neonicotinoids study.

She and other researchers studied bees in fields. Half of the fields were grown from seeds treated with neonicotinoids. The other half was grown with seeds that were not treated. She spoke about the results of the study in a video released by the journal Nature, which published it:

“The most dramatic result we found was that bumblebee colonies almost didn’t grow at all at the treated sites compared to the controlled sites.”

She says there were about half as many wild bees per square meter in treated fields as in untreated ones.

Dennis vanEngelsdorp is an entomologist, a scientist who studies insects. He works at the University of Maryland. He was not involved with the research on neonicotinoids. But, he says banning the chemicals may not be the answer. He says they are not as bad as other insecticides. He spoke to VOA on Skype.

“In many cases, (neonicotinoids) are actually the safest alternative and so by banning it, what you’re doing is forcing farmers to use products that may either be just as bad or worse.”

He says farmers often use the chemicals too much, and that may be hurting bees. Mr. vanEngelsdorp thinks farmers might not need to stop using neonicotinoids completely. He says the chemicals should be used more sensibly, or, in other words, only when necessary.

The same chemicals are thought to be linked to a problem with European honeybees – the bees kept by farmers to pollinate crops. The problem is called Colony Collapse Disorder. The worker bees from a beehive, or colony, suddenly disappear. Farmers do not see the dead bees around the hive.

A United States Department of Agriculture report included information about the effects of neonicotinoids. It said the chemicals make the bees more likely to become sick. The bees cannot fight the viruses that commonly affect them.

I’m Marsha James.

本文来源于普特论坛[report整理] SENEWS-2015-05-26


一项新研究表明,广泛使用杀虫剂对野生蜜蜂数量有伤害。野生蜜蜂很重要,因为他们对作物和野生植物授粉。
 
美国和欧洲的环保人士表示,新烟碱会引起蜜蜂属相下降。

杀虫剂广泛应用于世界各地。农民经常用杀虫剂喷种子。

化学物质的目标是吃庄稼的虫子,他们不会扩散到农田以外的地方。但是会进入到花粉和花蜜中,这些就是蜜蜂会接触到的地方。

Maj Rudlof 是瑞典隆德大学的研究人员。她带领研究新烟碱。

她和其他研究人员在田地里研究蜜蜂。田地里一半的种子用新烟碱处理过。另外一半种子没有用新烟碱处理。她通过自然杂志在视屏中公布了其研究结果:

“我们发现了最喜剧性的结果:大黄蜂的殖民地相比控制网站的处理地点,几乎没有任何增长。”

她说,种子经过处理的农田每平方米的野蜂数量只有未经处理的农田的一半。

Dennis vanEngelsdorp是一名昆虫学家和科学家,研究昆虫。他在马里兰大学工作。他没有参与新烟碱研究。但是他认为禁止使用化学试剂不能解决问题。他说这些试剂都不像其他杀虫剂害处颇多。他在Skype上向美国之音节目说到。
 
“许多情况下,新烟碱实际上是最安全的选择。如果禁止使用它,你让农民用什么产品呢?情况可能会和现在一样糟糕,甚至更糟糕。”

他说农民经常使用过多的化学试剂,然而这并不会伤害蜜蜂。vanEngelsdorp先生认为,农民可以不用彻底停止使用新烟碱。他认为,化学试剂的使用应该更加理智,或者换句话说,只有在必要时采用。

相同的化学试剂被认为和欧洲蜜蜂问题相关——这些蜜蜂都是通过农民给作物授粉的。该问题被称为蜂群衰竭失调。来自蜂箱或者蜂群的工作性蜜蜂忽然就消失了。农民在蜂巢附近也没有发现死去的蜜蜂。

美国农业部报道了关于新烟碱的信息。据说化学试剂会让蜜蜂生病。蜜蜂不能对抗病毒就会受影响。



顶一下
(36)
87.8%
踩一下
(5)
12.2%
手机上普特 m.putclub.com 手机上普特
[责任编辑:Tina]
------分隔线----------------------------
发表评论 查看所有评论
请自觉遵守互联网政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
用户名: 密码: 验证码:
  • 推荐文章
  • 资料下载
  • 讲座录音
普特英语手机网站
用手机浏览器输入m.putclub.com进入普特手机网站学习
查看更多手机学习APP>>