INSECTS INFESTING THE CABBAGE. 



327 



at the left, the bug, with its wings closed ; at the right, the 

 same, with its wings expanded. 



This species spread to such an extent in Sacramento County 

 as to prevent the growing of cabbages. 



Remedies.— Nos. 20, IO60 and 86. If the cabbages, etc., are 

 serioush^ infested by this cal)l)age-bug, use No. 64, or 83, or 

 H5, of double the strength recommended. 



CHAPTER CCXXIV. 



The Cabbage Aphis. (CaJ.) 



(ApJi is brassiccT. — Linnicus. ) 



Order, Hemipteba ; ^ t-. -i . 

 Sub-order, Homoptera ;^ Family, Aphidid.e. 



[Living upon the leaves of the cabbage, which tliey puncture 

 with their beaks and extract the sap ; small greenish-yellow 

 plant lice, sometimes marked with black and covered with a 

 bluish-white powder.] 



Fig. 384. — Cabbage Fig. 334. 



Aphis ; i. the winged 

 louse, natural size ; ^, 

 the same, enlarged — 

 colors, greenish-yellow 

 and black ; S, the wing- 

 less female, natural 

 size ; 4, the same, en- 

 larged — color, green or 

 yellowish. 



The wingless lice (Fig. 334, 4,) are of a pale pea green or 

 greenish-yellow color. The winged lice (Fig. 334, 2,) are 

 green or greenish-yellow, with the head black and a row of 

 dots along each side of the abdomen of the same color. — Pro- 

 fessor Thomas. 



This species of plant-louse is the most injurious that the 

 market gardener has to contend with. 



Remedy. — Use No. 74. 



