PARADICHLOROBENZENE ON YOUNG PEACH TREES, 5 
TasLe 4.—Results of different treatments of paradichlorobenzene on peach-borer larvee in 
2-year-old Hiley peach trees, Winchester, Ga., 1921-22. 
Number of larve found. | Per cent of larve. 
a Size of Doig Date i anges 
ose. | applied. | amined. O gas. F | 
trees + | Dead. eipe Active. | Dead. | ae Active. 
Ounces. 1921. 1921-22. Days. | 
5 4} Oct. 11] Nov. 2 22 0 0 Sewers eee eee ena F 
5 DF SE 8 23 0 0 O. [ee aas 2522 ee ee 
5 Ries dose). 22 42 0 0 iy SS Beek 1” 
5 3 doses: 2 22 0 0 ad ann Me rp as fae: aioe 7= 2A 
5 Si. de.-i. 8 28 0 0 i Rae Betis e | aaa 
5 aie. 00.23... 22 42 0 0 O22. +.-|---pts ee 
5 #| Oct. 21 | Oct. 25 4 1 0 0} 100.0 0 0 
5 2 |..-do..... 29 8 1 0 0} 100.0) 0 0 
5 # j.:-de-.... Nov. 2 12 0 0 2 eee Cees ew 
5 £3 |. es. 35. Oct. 25 t 0 + 0 0 100. 0 0 
5 ial de:.3. . 29 8 1 0 0 100. 0 0 0 
5 Bi). =-00..3.. Nov. 2 12 0 0 ges el eee label 
5 Oe ado: 32 Oct. 25 + 0 0 Ol loane coos ee cee eens 
5 +. le: 29 8 0 0 a Noreen sxrttcccesmen toma 
5 ge 12 Jdo--.2.) Nov. '2 12 0 0 Oot tos cee ee ee 
5 DMO Oct. 25 + | 0 0 PE 3. not feb oe oe ee 
5 ot .de..2-3 29 8 0 0 OS 2. tbat bos es ae 
5 Dt @e.c.,.| NOV 2 12 | 0 0 Dla odes uct bes aes ae oe 
5 | Check, |.......... 7 | ie ee ae | 0 0 SS EAE ph aM ey. 
i 
ONE-YEAR-OLD ORCHARD TREES. 
On account of the possibility of severe tree injury resulting from 
the use of paradichlorobenzene on 1-year-old trees, only a few trees 
were used in this experiment. One-half and three-fourths ounce 
doses were applied on October 11, 1921, and the trees were exposed 
to the treatment for 22 days. One-ounce doses were applied on 
October 21, 1921, and the trees exposed for 18 days. Table 5 gives 
the larvicidal action of the various doses used. 
TaBLE 5.—Results of different treatments of paradichlorobenzene on peach-borer larve in 
1-year-old Hiley peach trees, Winchester, Ga., 1921-22. 
| | Number of larve found. | Per cent of larve. 
= ear eve of id Date = | og | 
ose. | app amined. 0 gas 
rar | Dead Gane Active. | Dead. pane Active. 
5 | | ed. ed. 
cere | 2 abe el ees | et Se) ea Ee eS ee ee eee 
Ounce. 1921. 1921. Days. 
4 4 | Oct. 11] Nov. 2 22 2 0 0 100. 0 0 0 
4 2 11 2 22 0 0 Oleg. Eee ah ee ois eee 
4 1 21 8 18 0 0 1 RSE Seeeatres acre 
SUMMARY OF RESULTS. 
Table 6 brings together the results from all treatments on peach 
trees ranging in age from 1 to 5 years. 
