18 



CABBAGE. 



the case, watering would do much good by keeping up the flow 

 of sap ; and appHcations of hquid manure and such methods 

 of cultivation generally as will keep the plants in vigorous 

 health are to be advised, both as making the plants less 

 suitable for the insects and also preserving them from im- 

 portant injury by any excepting severe attack. 



A careful dusting with caustic lime or soot is also very 

 effective in getting rid of the Aphis, and some amount of good 

 may be done by carefully breaking off the leaves that are 

 coated with Green Fly (as happens in a bad attack) and 

 crushing them under foot, or putting them as they are 

 gathered into a sack, so that they can be thrown either under 

 w^ater in the sack, or out into wet manure. Any way that 

 will kill them at once will do. In the case of Aphides (as also 

 with other insects of which one kind infests many kinds of 

 crops), the remedies are mainly given in connection with the 

 crops that are most attacked ; the reader is referred, for 

 further details of Aphides and remedies, to papers on Hops, 

 Turnip, Plum, &c., and also to references to " emulsions," 

 and soft-soap washes, in Index. 



Large White Cabbage Butterfly. Piens brasskcc, Linn. 



1, Female buttorily ; 2, c^ss ; 8, caterpillar ; 4, chrysalis; 5 and H, parasite 

 Ichncuiiiou-liy, FtcvomaluH brassiccr, nat. size ami magnitied. 



Tbe caterpillars of this butterfly arc very destructive to the 

 Cabbage crop by eating away the leaves until at times nothing 

 is left but the large veins ; they do serious damage to White 



