EXPERIMENT STATION BULLETINS. 



577 



origin of some of the worst cases of infestation thus far found is still 

 unsettled. There can be little doubt that irresponsible dealers and care- 

 less agents in many instances have furnished infested stock to unsus- 

 pecting purchasers, and for this reason it may never be possible to trace 

 the infection to its source. 



It may or may not be possible to exterminate this pest as it is dis- 

 covered, and to keep it out of the State hereafter, but unquestionably 

 it is the duty of every loyal citizen to report at once the presence of any 

 suspicious insect and to allow the most thorough investigation, so that 

 in case of the actual discovery of the San Jose' scale the best methods 

 of combating it may be put in operation promptly and its spread and 

 increase be immediately checked. While the State Inspector alone has 

 full power to enforce treatment of infested orchards or stock, the Ento- 

 mologist of the Experiment Station will be glad always to examine and 

 name specimens of scale-insects or other insects of any kind, and to 

 furnish directions for avoiding or fighting any or all of our insect pests. 

 Address all queries relating in any way to insects or their work to "Con- 

 sulting Entomologist, Experiment Station, Agricultural College, Mich.," 

 and be sure in sending specimens that the name and address of the 

 sender are written plainly on the package containing the insects, so 

 that no confusion may be possible when (as often happens) several pack- 

 ages of insects are received by the same mail. 



■Fit.. 7. San Jose Scale (Afipidiotus perniciosus) ; a, infested twig, natural size; b, 

 bark as it appears under hand lens, showing scales in various stages of develop- 

 ment, and young larvas (after Howard. Bull. 3. New Series, Division of Ento- 

 mology, United States Department of Agriculture). 



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