64 THE PLUM CURCULIO. 
July shows an emergence of 467 larve (7.89 per cent) and August 1 
to 4, after which no more emerged, 74, or 1.25 per cent. 
At Washington, D. C., during 1908, a total of 6,588 larve was 
reared, 1,115 emerging during the last 7 days of May. During June 
5,002 larvee left the fruit, a total for May and June of 6,117, or 92.85 
per cent. Only 7.12 per cent of the totallarve emerged during July, 
emergence practically ceasing with that month. The Michigan rec- 
ords include only 895 larve, of which 889, or 99.33 per cent, left the 
fruit during July. 
The foregoing data, with the additional records by Crandall from 
Illinois, are shown in Table XXIII with the dates of blooming of 
peach trees for that year. 
The relation of these data to the time of making cultivations is 
shown on page 176. 
TaBLe XXIII.—Emergence by months of plum-curculio larve in different localities. 
| 
May. June. | July. August. | September. 
Approx- ; ; : ; - 
imate eh al 2 Ee 2 
date of | “% Sh Eb Sp aT 
Localities. full le: ; 5 ‘ : ; g 3 3 
som 0 g | g g 
peach | 2 | ao) © fa se ig 1.4 a ae 
trees. g a g a Q = R a R a Be 
Boe ec) BB hoe i Be a Se eee ee 
a 3) a a a ® a ® a ® ° 
4 AY 4 = 4 Ay 4 Ay =) _ & 
Barnesville, Ga.......- Mar. 15 | 2,665] 81.64 42) 1.28} 458) 14.02 99] 3..06).-=..- yee 3, 264 
Siloam Springs, Ark....| Mar. 18 | 3,664) 61.89) 1,715) 28.97 467| 7.89 TAY E25) Seas be ee 5, 920 
Washington, D.C...._. Apr. 6] 1,115} 16.92) 5,002] 75.93} 469) 7.12 Z|. ° O03) 22 ess |seeees 6, 588 
Douglas, Mich.......... 05 poe" 0)p| eee se | Late See ES Shs Ree 889] 99. 33 eC sees eaec = 
Gricesville ieee e228 May OL |stats eee 254] 20.52) 662) 53.47] 272) 21.97 50} 4.04) 1,238 
1 Apple 
MANNER OF LEAVING THE FRUIT AND ENTERING THE SOIL. 
Upon completing its growth, the larva leaves the fruit in which it 
has been feeding, and soon makes its way beneath the soil. Fruit 
lying upon the ground will usually show, when examined, the small 
exit hole of the grub, mostly along the lower side where the fruit was 
in contact with the earth. An examination of 200 infested drop 
peaches showed these exit holes to be located as follows: Apex, 8; 
apical third, 64; center of side, 66; basal third, 46; base, 16. This 
shows that 88 per cent of the exit holes are along sides as against the 
ends, which is perhaps proportionate to the respective areas. In 
deserting the fruit on the trees, as peaches and cherries, the larva 
must fall, and this is probably not injurious to it. Once upon the 
ground, the instinct is immediately to get below the soil. The time 
occupied in accomplishing this will vary according to character of 
soil, whether cultivated or not, and the presence of crevices, etc. At 
this time especially the larve are exposed to predaceous insects, par- 
