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Cockroaches lose their 'sweet tooth' to evade traps [View all]
http://www.bbc.co.uk/news/science-environment-22611143
A strain of cockroaches in Europe has evolved to outsmart the sugar traps used to eradicate them.
American scientists found that the mutant cockroaches had a "reorganised" sense of taste, making them perceive the glucose used to coat poisoned bait not as sweet but rather as bitter.
A North Carolina State University team tested the theory by giving cockroaches a choice of jam or peanut butter.
They then analysed the insects' taste receptors, similar to our taste buds.
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