Plague of Locusts (蝗虫灾害)

2. Using the pharmacies
It is suggested that the high efficient, low poisonous and low residual pesticides be used.
3. Using the natural enemies, The locusts have more than 60 natural enemies, including birds, amphibians, reptiles and so on. In some places, ducks, chickens, or spiders produce a good effect.
The first cause: Drought
The drought makes the locusts largely reproduce in a very short time because they like the warm and dry weather. A dry environment is good for their reproduction and growth. The dry soil with the water content between 10 percent and 20 percent is the best condition for the locusts’ spawning.
Many people in the world have been suffering through the disastrous locust swarms since the 1950s. Farmers have lost entire crops. But locusts are not that bad. At least you will have plenty of hors d’oeurves.(开胃食品)
The second cause : living habits
1.They have gregarious (合群的) habits. 2.They have strong fertility. 3.They are polyphagous (eating many kinds of plants). 4.Their flying abilities are strong. 5.Their eggs are deep under the ground, and are hard to be destroyed.
Plague of Locusts
Every several years, parts of Africa are likely to be covered by a dark cloud, a living cloud made of billions of locusts that are travelling across the continent eating everything in their path.
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Maggot
Silk worm chrysalis
Definitely, worms and insects are delicious and nutritious. But do you have the courage to eat them. It is a challenge to you. Have a try!
The third cause: the warm winter
With the global warming, especially the temperature rising in winter, the survival rate of locusts becomes high. And the grasslands’ degradation supports the available places for their spawning.
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the grasslands’ degradation near Qilian Mountains
The preventive measures
1.Protecting the environment The locusts must egg on the lands with the coverage of vegetation under 50 percent. If we do well to protect environment, and improve the weather, it will prevent the plague.
草原“牧鸡“ ---- 蝗 虫的天敌
Leabharlann Baidu The plague of locusts in China
The plague of locusts has happened many times in China. The regions are mainly in the provinces of Hebei, Henan, and Shangdong, and also in Shanxi, Shaanxi, Jiangsu, Anhui, Hubei and so on.
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http://video.nationalgeographic.com/video/player/kids/animalspets-kids/wild-detectives-kids/wd-ep9-locusts.html
Plague of locusts is a worldwide disaster of biological agriculture. There are nearly 100 countries or regions have been attacked by it. Especially in Asia and Africa.