18 THE SAN JOSE OR CHINESE SCALE. 



that they were aware that the}^ were distributing diseased stock/ since 

 to deny this presupposes that the stock received no examination. If 

 the scale was noticed it was doubtless supposed to be one of the com- 

 mon eastern species, which, while bad enough, are of little importance 

 compared with the San Jose scale. 



The two nurseries responsible for the original eastern introduction 

 of the scale became infested in the same way. Either in 1886 or 1887, 

 in the endeavor to secure a thoroly curculio-proof plum, both of these 

 nurseries introduced from California an improved Japanese variety, 

 the Kelsey, obtained from the San Jose district. We have the state- 

 ment from the proprietors of one of the nurseries that the plum trees 

 in question were secured in the spring of 1887 from San eJose, Cal., 

 and were shipped thru the agency of a Missouri nurser}" compan}^, which 

 acted in this instance apparentl}^ as a mere transmitting agent. The 

 trees were unquestionably thorol}" infested when received, did not 

 thrive, and in both cases most of them were ultimatelj^ taken out and 

 destro3^ed. The stock, however, had been multiplied b}" nursery 

 methods, and from the original stock, and that subsequentlv obtained, 

 the scale spread more or less completel}^ thruout both of the nurseries 

 in question. Both of these firms, when the nature of the infestation 

 was brought to their attention and the seriousness of the damage they 

 were doing was made apparent to them, undertook measures to 

 exterminate the scale. 



In addition to the two prominent nurseries mentioned, several smaller 

 nurseries in the East were found to harbor this scale. Some of these 

 had been recently infested, but in others the infestation Avas of long 

 standing. Three nurseries of the latter class were located on Long 

 Island, and apparently received their original scales from New Jersey; 

 one in Florida, reported by Prof. P. H. Rolfs, and two in Georgia 

 apparentlv received infested stock from eastern sources, and one or 

 more each in Louisiana, Mississippi, and Alabama became infested 

 with the scale thru pear stock coming from Lewiston, Idaho. In Mas- 

 sachusetts there were infested nurseries at Cambridge and Bedford, 

 the origin of the scale in these cases being obscure; and a nursery in 

 Missouri was under suspicion as having been the agency thru which 

 the original infested Japanese plums were transmitted to eastern 

 nurseries. Two infested nurseries were known to exist in Maryland 

 also. 



SUMMARY, BY STATES AND TERRITORIES, OF DISTRIBUTION 



AND PRESENT CONDITION. 



The detailed facts relating to the first introduction of the San Jose 

 scale into the several States are given in Bulletins 3 and 12, and with 

 greater minuteness in the various publications of the experiment sta- 

 tions of the several States involved. The distribution has now become 



