INSECTS AND PREVENTIVES 



pensable provision, to save his entire scheme of 

 cultivation from absolute failure; to make it even 

 possible to raise crops that will pay. 



INSECTS AND PREVENTIVES 



So extensive and serious is the destructive work 

 of injurious insects that except on such land as 

 is kept under continual tilth and subjected to 

 constant and thorough cultivation, with judicious 

 rotation of crops it often seems as if the bugs 

 must get the upper hand of the grower, do what 

 he may. Bugs of one kind or another are found 

 eating everything that grows in the shape of use- 

 ful vegetables; but they never attack a weed. 



Unlike the mildews and other fungous parasites, 

 insects are nowise discouraged and driven off by 

 healthly and vigorous growth of the plants 

 this is just what they like to find. Sometimes 

 they will sweep off every plant in an early stage of 

 growth; or they may delay their coming till just 

 before harvest and then consume the entire 

 crop. 



The Wavy-striped Flea-beetle (Haltica striolata) 

 is very destructive to young cabbages and turnips. 



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