48 A MANUAL OF DANGEROUS INSECTS. 



BOX. 



(Buxus spp. Family Euphorbiaceas.) 



Evergreen shrubs or small trees commonly used for hedges, occurring natively in 

 Central and Eastern Asia, North Africa, Europe, and Central America, and much 

 used in this country. 



IMPORTANT INSECT ENEMIES OF BOX. 



HEMIPTERA. 

 Coccldae: 



Unarmored — 

 Eriococcus hxixi Fonscolombe; Europe. 



DIPTERA. 

 Itonididse (Cecidomyiidae). 



>(!: Monarthropalpus buxi Laboulbene; Europe, eastern United States; leaf miner. 



BROOM CORN. 



(See Sorghum.) 



BRUSSELS SPROUTS. 



(See Cabbage.) 



BUCKTHORN. 



{Rhamnus spp. Family Rhamnaceae.) 



Ornamental deciduous or evergreen shrubs or trees propagated from seed or cut- 

 tings. The genus occurs chiefly in the northern temperate regions, but some 

 species are found in Brazil and South Africa. The wood of R. frangula is made into 

 charcoal valued for the manufacture of gunpowder. 



IMPORTANT INSECTS ATTACKING BUCKTHORN. 



HEMIPTERA. 

 Coccidse. 



Lecanium ciliatum Douglas; Germany, Tyrol; attacks Rhamnus alaternus, and R. frangula. 



Chionaspis salicis Linnfeus; Austria; attacks R. frangula. 



A number of scales already in the United States also attack Rhamnus. 



LEPIDOPTERA. 

 Cossidae. 



^Zeuzera pyrina Linnaeus; Europe, Africa, N. America, bores in wood. (See Horse-chestnut.) 



Lymantrlidse. 



DasycMra pudibunda Linnaeus, a defoliator; Europe. (See Forests.) 

 ^ifiLymantria monacha Linnaeus, the nun moth; Europe; defoliator. (See Forests.) 



Hyponomeutidae. 



Hyponomeuta padi Zeller, a web worm; Europe; attacks R. frangula. 

 Hypanomcuta evonymella, a web worm; Europe. 



LITERATURE. 



SORAUER, p. Handbuch der Pflanzenkrankheiten, 3d ed., 1913, vol. 3. 

 Hess, R. Der Forstschutz, 1900, vol. 2. 

 LiNDiNGER, L. Die Schildlause (Coccidae), 1912. 



CABBAGE; KALE; COLLABD; BRUSSELS SPROUTS; CAULIFLOWER; 



KOHLRABI. 



(Brassica oleracea Linnteus, varieties. Family Cruciferse.) 



The many varieties of this species especially in Europe, have very important 

 pests, which it is not desirable to have imported into this country. Since the flower 

 head is used in some varieties, the foliage in others, and the roots in others, there is 

 danger of importing almost any pest of the species. 



