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每日跟讀#660: About Insects - Roaches are good for humans and can't be exterminated.

昆蟲: 蟑螂的善與惡

· 每日跟讀單元 Daily English

Papa roach: Chinese farmer breeds bugs for the table 蟑螂老爹:中國農民養蟑螂上餐桌

As farmer Li Bingcai opened the door to his cockroach farm in Yibin, Sichuan province, a critter flew into his face. He tossed it back into the dark room where some 10 million more of its kind scurried around.


These creatures may be a bugbear for most, but breeders like Li are turning them into a niche business. While some sell cockroaches for medicinal purposes, as animal feed or to get rid of food waste, Li breeds them for food for human consumption.


A restaurant down the road from his small facility fries them up in famously spicy Sichuan sauce for the gutsier eaters. "People don’t believe how good it is until they try some," Li said, putting one into his mouth.


Known colloquially as American cockroaches, the Periplaneta Americana is one of the largest species and is consumed for a variety of ailments: stomach ulcers, respiratory tract problems, and even simply as a tonic.



Cockroaches could soon be almost impossible to kill with pesticides 蟑螂不久後恐幾乎不可能用殺蟲劑殺死

A new study has found that German cockroaches, the most common species of the insect in the world, are developing cross-resistance to numerous insecticides.


Not only were researchers in some cases unable to reduce cockroach numbers during a six-month study period, even when combining different insecticides, but they found the insects’ resistance increased up to six-fold within one generation.


The team says it was able to keep the roach populations stable during the study period, but could not make a significant dent in their numbers.


With the two-insecticide mixture, the pests even appeared to thrive.


One of the single-insecticide experiments suggested the population was at first vulnerable to the method, and in that case they were able to mostly wipe them out. But, in another trial with 10 percent starting resistance, the population grew despite treatment.


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