7 
peach especially, with from 2,000 to 3,000 acres in practically unbroken 
rows of trees. Orchards of still larger size are planned and are being 
planted at the present time. In the following table, compiled from 
che reports of the Twelfth Censns, is indicated the increase in bear- 
ing trees, during the decade 1890 to 1900, of the more important 
pomaceous and drupaceous fruits: 
TaBLE I.—Number of bearing trees in orchards in 1900 as compared with those 
in 1890. 
: Bearing trees. Increase 
Class. SE during dec- 
1900. 1890. ade. 
SENT ay OMS ea he SRS Gas ek ah a 201,749,764 | 120,152, 795 81, 841, 969 
IRGaAchesia Nn dene ta rin CS pe sees seen een eae byl ae EL 99, 919, 428 53, 885,597 46, 033, 831 
PRCATS er ee cere see yy es aay © Lohans ye nee aed Ne US Cu lh La 17, 716, 184 5, 115, 055 12, 601, 129 
Rm Sram dap RUE ese ea eae ye see Me Su ails ee a ee 30, 780, 892 7,078, 191 23,702, 701 
ON EROS Fe SS a oe IES ate ee ea aa ee cs Os ts Ee eee 11, 943, 287 5, 638, 759 6, 304, 528 
PACD TSI CO LS pe craten sis mapa eer een ape mute es hice ee Dee) vi elie 5,010, 139 1,582, 191 8, 429, 948 
eNO ell] eka eqs sien aa I oon) Lee by ool Ne Leen ee Dall Re 367, 164,694 | 193, 452,588 158, 712, 106 
The total increase in plantings of fruit trees of this class is thus 
seen to have been 153,712,106 trees, a number sufficient to plant a solid 
orchard, with trees 20 by 20 feet apart, of somewhat more than 
1,400,000 acres. More recent information indicates a still greater 
proportionate increase during the present decade. Thus, in the 
State of Georgia I am informed that the present estimated plantings 
of peach trees are aproximately 18,000,000, both young and old. 
Leaving out of account the unreported voung trees of the census of 
1900, this shows the enormous gain of about 7,500,000 trees in four 
years. The increased plantings of apple, notably in Missouri, are 
also remarkable. In that State alone over 20,000,000 trees are re- 
ported for 1900 as against 8.000,000 for 1890. 
These figures, I think, explain one of the principal causes for the 
rapid development of economic entomology in America. The sudden 
and wide disturbance of nature’s balance between insects and their 
food plants by the cultivation of large areas of crops has resulted in 
insect depredations, both from native and introduced species, of 
such proportions as to render relief immediately necessary. 
Our problems have been, therefore, largely of a character to de- 
mand earnest and instant effort for their solution, and the rapidity 
with which one problem has succeeded another has utilized to the 
fullest extent our capacity for work. The results of investigations 
have been of a character to justify the public in providing for their 
continuance and extension, and the demand for workers has been 
greater than the supply. This continued activity has brought about 
a considerable accumulation of knowledge concerning injurious spe- 
