535 



CABBAGE APHIS (Aphis e brassicse, Linn.). 



There are several modes of dealing with this pest, and among 

 them the best are to spray with Nos. 7, 8, 10, 14, 15, 19, or 20. 

 (See pp. 490-492.) 



Cabbage Apis (Aphis brassicee), 1, winged female; 2, winged male ; 2, showing 

 hole in back made by 3, Ichneumon fly. 



Two species of ladybirds Leis conform.is and Coccinella 

 punctata which prey upon this apis have been introduced into 

 State, as well as two species of Ichneumon flies. 



m- 

 the 



Aphis-feeding Ladybird (Coccinella sep- 

 tempunctaia) . a, adult beetle ; b, larva ; 

 c, pupa. All enlarged (after Berlese). 



WOOLLY APHIS (Schizoneura lanigera). 



This species, in addition to secreting a honey dew, secretes a 

 bluish white flocculent, cottony substance, which oftentimes almost 

 completely conceals them, appearing to be tufts of cotton attached 

 to leaves and twigs. This pest has been distributed to every apple- 

 growing country, but its place of origin is not yet known. It is, 

 however, one of the most annoying pests with which the apple- 



