PARADICHLOROBENZENE ON YOUNG PEACH TREES. a. 
TaBLeE 1.—Results of different treatments of paradichlorobenzene on peach-borer larve in 
5-year-old Redbird peach trees, Fort Valley, Ga., 1921-22. 
Per cent of larve. 
Number of larve found. 
Num- 
ltol c= of ae Date = 
ose. | appli amined. é 
trees. id j -| Dead. | ee | Active. 
" ae 
‘Ounces.| 1921. | 1921-29. | | | 
5 4 | Oct. 12| Nov. 3! 22 | 8 2 1 | 72.7 \. 18,2} 9.1 
5 2 a ees 9 | 28 i 0 0| 100.0] 0 0 
5 | hep ada. - <-| 23 42 3 0 0} 100.0 0 | 0 
5 | 4 |...do....| Apr. 13 | Over win- 4 0 0 | 100.0 ! 0 | 0 
ter. 
5 ae) 5.00. ..-|.Nov.. 3 22 6 1 0 85.7 14.3 | 0 
5 af 2 Goel. 9 28 17 i) 0 100.0 0 0 
5 742. :00-. = 5 23 42 5 0 0 190.0 | 0 0 
5 2 }...do....| Apr. 13 | Over win- 1 0 0 100.0 | 0 0 
ter. 
5 femss-d0...:|INov. 3 22 8 0 0 100.0 | 0 0 
5 is OO... _ 9 28 19 0 0 100. 0 | 0 0 
5 1 S°do. | - 23 42 5 0 0 100.0 | 0 | 0 
5 1* |..-do...-| Apr. 13 | Over win- 2 0 0 100.0 | 0 | 0 
ter. } } 
5 13 | Oct. 20 | Oct. 24 + 2 2 04 50.0 | 50.0 | 0 
5 de paris 6 (pai 28 8 3 0 1 83.3 0 16.7 
5 Pie do. Nev. 1 12 16 1 0 94.1 5.9 0 
5 2712 00-- 1) Oct... .24 4 it 7 0 36. 4 63.6 0 
5 ie de... 28 8 4 | 0 0} 100.0 0 0 
5 Zt G0.-.. | iNove — 1 12 6 0 0 100.0 0 0 
5 23 1...do..-.| Oct. 24 4 12 7 0 63.2 36.8 0 
5 7 ty ea 6s ae 28 8 8 0 0 100.0 0 0 
5 Pas d6s2 ONO. 12 4 0 0 100.0 0 0 
4 | Check. |..20.20... oN) Me deme etrang &. 0 0 5 0 0 100.0 
40 }.(hock: |.) _...... Tip Sees | OR 0 0 61 0 0 100.0 
Si ite coe Apr. 13 0 0 8 0 0 100.0 
FOUR-YEAR-OLD ORCHARD TREES. 
In the experiment on 4-year-old trees also, 122 trees were used, 
and all tests conducted on the 5-year-old trees were duplicated on 
4-year-old trees. Table 2 gives the larvicidal action of the various doses 
at different exposures on 4-year-old trees. 
TaBLE 2.—Resulis of different treatments of paradichlorobenzene on peach-borer larvx 
in 4-year-old Redbird peach trees, Marshailville, Ga., 1921-22. 
| 
Number of larve found. | 
Per cent of larve. 
——" ize of eye Date = poset 
ose. | app amined. O gas. : 
__ trees. Dead. Gana Active. | Dead. pee Active 
E> | 
Ounces.| 1921 1921-22 Days 
5 3 | Oct. 10] Nov. 1 22 17 0 0} 100.0 0 0 
5 4 f- 807: 7 28 6 0 0 100.0 0 0 
5 + ee do.7.. 21 42 2 0 0! 100.0 0 0 
5 q 133540) 52.2 Apr. 10 | Over win- 2 0 0 100. 0 0 0 
ter. 
5 2 |...do.....]| Nov. 1 22 i 0 0 100.0 0 0 
5 3 |...do.... 7 28 2 0 0 100. 0 0 0 
5 yr: (es ae 21 42 0 0 J eee Sees ee 
5 ; do. 0_/ApeU10 eg 3 0 0 100.0 0 0 
er. i 
5 Be J7.80-c- 5 Noy. 1 22 10 5 0 66.7 33.3 0 
5 4 43--dp. 2-4 7 28 0 0 OP -Oi2 i. 4. 1S. TSh SABLE ’ 
5 1 a ae 21 42 3 0 0 100.0 0 0 
5 b Aietdo<s Apr. 10 | Over win- 4 0 0 100.0 0 0 
ter. 
5 14] Oct. 17] Oct. 21 4 3 2 0 60. 0 40.0 0 
5 CS (ae 25 8 6 0 0 100.0 0 0 
5 iC Bee Coa 29 12 9 5 | 0 64. 3 35. 7 0 
5 2 eet Ouest 21 ay 16 5 0 76. 2 23.8 0 
5 7g eae 25 8 + 1 | 0 80.0 20. 0 0 
5 eT AO zen so 29 12 13 2 | 0 86.7 13.3 0 
5 | 1. do..... 21 4 6 7 | 0 46.2 53.8 0 
5 | NG) eae 0 Cy See 25 8 0 0 | OY SEE eee OO An JE eae Se 
5 ir ese GOs ans. 29 12 1 0 0 100.0 0 0 
Depeneck,. $o5--. 5.5. Novcal tz2.-22 canes 0 0 32 0 0 100.0 
By Checks f-......... Fe fee 0 | 0 11 0 0 100.0 
3 | Check. }.......... ABR IG sei ney 0 | 0 | 16 0 0 100.0 
, I I 
