36 BULLETIN 250, U. S. DEPARTMENT OF AGRICULTURE. 
gallons of water. It should be applied as soon as the trees come into 
full leaf and will assist materially in controlling the codling moth. 
Improved methods of management and care of the trees will do much 
to decrease the danger from this pest. Hollow trees should be filled 
or cut, and all rubbish that will furnish convenient quarters in which 
the moths may deposit their eggs should be cleaned up and burned. 
If the orchard infestation is serious, creosoting egg clusters and 
banding the trees with tanglefoot may be necessary. 
During the past year a number of cases of severe injury to cran- 
berries have been observed. This was caused by feeding of the cater- 
pillars on the tender growth and cutting off the fruit buds and blos- 
soms, which resulted in a serious decrease in the yield. 
It is probable that this insect will not increase in sufficient numbers 
in cranberry bogs to kill the vines, and it has, therefore, been con- 
sidered as able to survive on this’plant (Class III). The money loss 
on account of diminution in yield is likely to be serious. 
THE CITY PROBLEM. 
On home grounds, in cities and parks, or on street or shade trees, 
this problem requires the expenditure of large sums of money if 
species favorable for the development of gipsy-moth caterpillars are 
to remain. Not only must the insect be reduced, so that injury to 
the trees will not result, but the caterpillar nuisance must be abated, 
particularly in the residential sections. 
- When future plantings are made, species should be selected which 
will not require a constant expenditure of money in order to keep 
them free from the moths. The lists given will furnish a guide in 
this respect. 
INDEX OF FOOD PLANTS USED IN THE EXPERIMENTS. 
i = Page. 
Alder: Spreckled (Alnus incana aa Wall.) 203 eee eee 6 
PADDLE AY LAS sIUCVIES | eis eet ogi 2S ae A a eee yee 6 
ADO Vltee (LENO OCCUCECIUEC UES i Vir yo Ts Ea a a 6 
Arrowwooe, (Viburnum dentatwm Wii) ee ee eee 26 
Arrowwood, Maple-leaved (Viburnum acerifolium UL.) _~~_----_-_---_---§- 26 
Ashsiblack (Pra xinus nigra. -[ Marsh, ])) eats ee ee aes 6 
Ash (Blue Cinariuvus quadrangulata INI Ghxe) eee ees eet ee ee 6 
Ash, Mountain: (Pyrus americana (Marsh.) D.C.) = 2-2-2 ae Tf 
: Ash, Red (Fraxcinus pennsylvanica Marsh.) 2 2222 e ee eee 7 
Ash? White; GEnacinus americana: 1i:) fase ee ee ee ay 7 
Aspen, American (Populus. tremuloides Michx.) 2) 3 es 22 
Aspen, Large-toothed (Populus grandidentata Michx.)—~~---_--_---_---- 23 
Avalea, Flame? (Acaleg\ tweed Ti.) noe ee Ng Ft ff 
Azalea, (White (Azalea viscosa -“L.)) 22 eee ee ee ae 2 a a a ae 7 
Balm-of-Gilead: (Populus Galsannjfer@ Vu.) 2222s ee eee 23 
Barberry, Huropean CServeris vulgaris Vi.) 522 ee a ee er ie 
Bayberry’ (Myrica carolmensis Mall) S22) 2 ee ee 7 
