38 MASSACHUSETTS HORTICULTURAL SOCIETY. 



For the red spider use sulphur sprays or drenching the plants 

 with water. 



The squash bug is rather hard to combat except by hand picking. 

 The eggs, which are conspicuous on the under side of the leaves, may 

 be gathered by hand before they hatch and so help rid the plant of 

 this pest. 



Query was made concerning a leaf miner which appears about 

 the first of May, eats out half of the leaf of the elm, causing the 

 leaves to drop. Kerosene emulsion was suggested as a possible 

 remedy for it. 



The best way to treat the soft scab or scale on house plants is to 

 wash them off with a soap and water solution. Whale oil soap or 

 any strong soap is always satisfactory. 



The rose slug is controlled very nicely by using arsenate of lead 

 or by dusting with air-slaked lime. For the elm leaf beetle, which 

 has done great injury to our elm trees, spray with arsenate of lead 

 and collect the insects at the base of the tree. 



For the root maggot of the cabbage and cauliflower bi-sulphide of 

 carbon has been recommended. It w^as tried quite extensively three 

 years ago and in some places it did well and in others it was not satis- 

 factory. After giving it a careful trial the New York growers have 

 dropped it. It is doubtful if it be advisable to use it on a large 

 scale. 



For the lace bug of the rhododendron kerosene emulsion is the 

 simplest thing. 



Miscible oils can be used for spraying apples and pears for San 

 Jose scale, but they are not safe to use on peach trees. 



The home preparation of arsenate of lead is not to be recom- 

 mended unless operations are carried on on a large scale. 



The best time to spray for the San Jose scale in an apple orchard 

 is in April just before the buds begin to swell, if sprayed only once; 

 if sprayed twice it should be done in the fall and in April. 



