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The Great Bug Family (There is a contagious disease)
There is a contagious disease that kills them off in very great numbers.
Ned says he can guess what remedy the people apply to the healthy chinch bugs that are eating their grain. Yes, they introduce diseased chinch bugs into the grain fields with the healthy ones. The contagion spreads and the bugs die!
There is another way of getting rid of some kinds of troublesome insects. That is, to introduce an insect not injurious to vegetation, that will prey upon the injurious ones.
