The Small Fruits. 163 



pands later than that of healthy stems. All such weak 

 ■stems should be promptly cut and burned to destroy the 

 larvae within them. 



' 240. The four-lined leaf-bug {Poecilocapsus Uneafus) at- 

 tacks the leaves at the tips of the shoots during June and 

 July, sucking out their juices. The bugs may be jarred 

 from the bushes early in the morning, into a pan contain- 

 ing kerosene. The young insects may be destroyed by 

 dilute kerosene (about ten per cent, in strength). 



241. The leaf spot or rust [Septoria Elbis) affects all of 

 the groselles, appearing in early summer as small, brown 



-spots upon the foliage. In case of severe attack, the plants 

 may become defoliated during the latter part of summer. 



Treatment. To prevent this disease, the plants may be 

 sprayed in early summer with the ammoniacal solution of 

 copper carbonate, to be followed after the fruit is harvested 

 with a copious spraying of Bordeaux mixture. 



Plant lice (53) often attack the foliage of the groselles. 

 On the red currant these often cause the foliage to blister 

 and red spots sometimes form on the upper surface of the 

 leaves. The lice are often diflBcult to destroy, but spraying 

 -with dilute kerosene is perhaps the most satisfactory treat- 

 ment. 



242. The black currant {Ribes nigrum) is more vigorous 

 in habit than the red currant, and less subject to damage 

 from insects and diseases. The foliage has a peculiar, pun- 

 gent odor, and the fruit is acid and aromatic; though es- 

 teemed by some people, it is not generally popular. 



243. The Crandall currant {Ribes aureum) is cultivated 

 io a slight extent for its large, glossy, bluish-black, rather 

 mild fruits, which are esteemed by some for jelly and 



