II. Notes oil Remedies for the Pernicious and 

 Other Scale Insects. 



{a) Pernicious Scale. 



A brief review of the history of the introduction, distribution and 

 spread of the '' Pernicious Scale " has been given in Bulletin No. 

 87 of this Station. 



Althougli it has not been entirely exterminated from nurseries on 

 Long Island it is fairly well under control. At the close of the 

 season of 1896 we hope to be able to report that it has been ex- 

 terminated not only in all the Long Island nurseries, but also that it 

 is in a fair way to be exterminated in private yards and orchards to 

 which it has been distributed by these nurseries. At that time a 

 complete review of the history, distribution and habits of the pest 

 in this section may be valuable. For the present a summary of the 

 remedies and measures used with notes made on the same may be 

 of some practical use for future work. 



N^o newly infested nurseries have been located the past year, but 

 the pest has been traced to nearly all parts -of the Island. In all 

 cases where it has been found, the infested trees were obtained 

 either from the infested Long Island, or the JS'ew Jersey nurseries. 



Winter Washes. — On December 21, 1894, the following washes 

 were applied to three and four year old pear trees in the nursery of 

 Keene & Foulk, Flushing, N. Y. : 



Trees. 



(a) Kerosene emulsion dilnfod witb two parts water 60 



(6) Kerosene emulsion diluted with three parts water 38 



(c) Winter resin wash 35 



(d) Lime-sulpLur-salt wash 21 



(e) Crude potash, saturated solution 23 



(/) Fish oil soap, two pounds dissolved in one gallon of water 8 



At the time the above washes were applied the twigs contained 

 frost. All the washes had to be applied warm, even hot in the case 

 of the lime-sulphur-salt and soap washes. The former crystalized 



