搜索关注在线英语听力室公众号:tingroom,领取免费英语资料大礼包。
(单词翻译)
AGRICULTURE REPORT - Risk to a Popular Banana Shows Need to Grow Other Kinds
By Mario Ritter
Broadcast: Tuesday, September 20, 2005
I'm Doug Johnson with the VOA Special English Agriculture Report.
In recent years, some concerns have been raised about the health of the world's banana plants. A number of media reports have said that bananas may completely disappear. Some claimed that this could happen in as little as ten years. Such fears are disputed1, however.
Bananas are one of the world's most important food crops. They are also one of the most valuable exports. Bananas do not grow from seeds. Instead, they grow from existing plants. Bananas are threatened by disease2 because all the plants on a farm are copies of each other. They all share the same genetic3 weaknesses.
For example, the Cavendish banana is most popular in North American and European markets. However, some kinds of fungus4 organisms5 easily infect the Cavendish. Black Sigatoka disease affects the leaves of Cavendish banana plants. The disease is controlled on large farms by putting chemicals on the plant's leaves. Farmers put anti-fungal chemicals on their crops up to once a week.
Another fungal disease is more serious. Panama disease attacks the roots of the banana plant. There is no chemical treatment for this disease. Infected plants must be destroyed. Panama disease has affected6 crops in Southeast Asia, Australia and South Africa. There is concern that it may spread to bananas grown in the Americas. This could threaten an important export product for Central and South America.
The International Network for the Improvement7 of Banana and Plantain supports research on bananas. The group has headquarters8 in France and other offices in the major banana-growing areas of the world. The group says that more research must be done to develop improved kinds of bananas.
The group says that fungal diseases9 mainly affect only one kind of banana. In fact, there are five hundred different kinds of bananas. The United Nations Food and Agriculture Organization has said that the Cavendish banana represents only ten percent of world production.
The U.N. agency10 says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This happened earlier to another popular banana because of its genetic weakness against disease.
This VOA Special English Agriculture Report was written by Mario Ritter. I'm Doug Johnson.
1 disputed | |
v.辩论,争论( dispute的过去式和过去分词 );争夺;阻止;就…进行辩论adj.有争议的 | |
参考例句: |
|
|
2 disease | |
n.疾病,弊端 | |
参考例句: |
|
|
3 genetic | |
adj.遗传的,遗传学的 | |
参考例句: |
|
|
4 fungus | |
n.真菌,真菌类植物 | |
参考例句: |
|
|
5 organisms | |
n.有机物( organism的名词复数 );有机体;生物;有机体系 | |
参考例句: |
|
|
6 affected | |
adj.不自然的,假装的 | |
参考例句: |
|
|
7 improvement | |
n.改进,增进;改进之处,改善的地方 | |
参考例句: |
|
|
8 headquarters | |
n.司令部,指挥部;总部,总店 | |
参考例句: |
|
|
9 diseases | |
n.疾病( disease的名词复数 );弊端;恶疾;痼疾 | |
参考例句: |
|
|
10 agency | |
n.经办;代理;代理处 | |
参考例句: |
|
|
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎 点击提交 分享给大家。