105 



A correspnnaont states that lie has successfully used a solution of salt as 

 a spray, which ho found effectual in destroying this pest. His method of 

 preparing the sjiray is to place a quantity of salt in a vessel and fill it with 

 water, allowing it to stand for 24 hours and then pouring off the water, which 

 is then ready for use. The water will only take up salt to point of saturation. 

 The quassia and whale-oil soap spray, No. 2. has also been found to be effica- 

 cious in this Province. 



Bean Aphis {Aphis ruiiiicis, L.). I'ig. 22. 



(Fig- 22.) Natural size and enlarged. 



-I»nc7t.— Black plant-lice thickly clustered on the tips of horse beans and 

 broad beans, and also occasionally on other smooth beans, at the time of 

 flowering. 



One of the great diliiculties of growing horse beans in Canada has been 

 tlie occurrence of this European species of plant-louse, which is such a serious 

 pest of hor.se beans in Europe. As this crop is little grown in Canada, small 

 attention has been drawn to it. 



Remedy. — The usual jiractice in Europe is to cut off the tips of attacked 

 plants, upon which the plant-lice are nearly always clustered, leaving the rest 

 of the plant at the time of flowering free. This practice is also beneficial 

 because it overcomes one of the chief difficulties in growing this crop, which is 

 the failure of the pods to develop. This checking of the growth l)y cutting off 

 the tips causes the flowers to set pods better than if the tips are left on. — 

 Fletclier. 



Apple Aphis (.I/j/m'.s inuU). 



(Fig. 23.) Greatly enlarged. 



