I. NOTES ON THE SAN JOSE SCALE. 



Another season's experience has again demonstrated that the 

 San Jose scale can be as easily controlled as many of the insects 

 with which the farmer and fruit-grower are more familiar. The 

 potato-bug has been fought for twenty years, the codlin-moth 

 has been given annual treatments of Paris green ever since the 

 general spraying of orchards has been practiced, j^et these insects 

 reappear in abundance every year. They and their kindred, 

 however, cause no alarm ; but if they were left unchecked in 

 their ravages, the annual losses from them in this State would be 

 almost inconceivable. 



It may not be possible, from a practical point of view, to 

 exterminate the scale in an infested orchard without injur}^ to 

 the trees any more than it is possible to exterminate the potato- 

 bug ; yet I am convinced that the same vigilant, persistent effort 

 which controls the potato-bug, codlin-moth and other insect 

 pests will also control the San Jose scale. I do not wish to 

 minimize the danger from this insect, for it is indeed serious under 

 conditions favorable for its development, but there has been a 

 tendency to undul}- emphasize the seriousness of the pest. 



Our observations on this insect, recorded in Bulletin 144, have 

 been continued and extended during the past season, and the 

 conclusions at which we arrived from last season's experience 

 have been largel}' corroborated. 



Experiments ix 1898. 



A large number of small pear trees, badly infested Mith the JSan Jose scale, 

 were placed at our disposal and treated with the following solutions and mix- 

 tures : 



Lot No. I. Whale-oil soap, 2 pounds to a gallon of water. 



Lot No. 2. Whale-oil soap, i pound to a gallon of water. 



Lot No. 3. Pure kerosene. 



Lot No. 4. Kerosene, 20 per cent ; water, 80 per cent. 



Lot No. 5. Kerosene, 10 percent ; water, 90 per cent. 



