TABLE II. 
Insecticide Used 
Strength of 
Insecticide 
Date of 
Spraying 
Date of 
Examination 
No. of Aphids 
on 6 Twigs 
From 2 Trees 
Black Leaf - 
1-30 
March 7 
March 15 
2 
Black Leaf - 
1-40 
44 
a 
2 
Black Leaf - - -- 
1-50 
44 
44 
1 
Black Leaf -- 
1-70 
1 
Black Leaf “40” _ - - 
1-600 
44 
u 
0 
Black Leaf “40” - - 
1-800 
44 
u 
6 
Black Leaf “40” - 
1-1000 
u 
a 
' r '7 
Rex Lime and Sulfur 
1-10 
u 
44 
1 
Rex Lime and Sulfur - 
1-11 
u 
u 
2 
Soluble Oil - 
1-20 
u 
0 
Check - 
* 9 «. * » : - * • » > . 
. . . 
* 
93 
TABLE HI 
Insecticide Used 
Strength 
Date of 
Spraying 
General Results in 
Killing Aphis 
General Results in 
Killing Twig-Borer 
Early 
Spray 
Late 
Spray 
Early 
Spray 
Late 
.Spray 
Black Leaf-- 
1.30 
March 7 
Good 
Unsatisfac- 
• 
tory 
Black Leaf. 
1 40 
March 7 
Good 
— 
Black Leaf-- -- - 
1-50 
March 7 
Good 
Good 
i 4 
Unsatis- 
and 28 
factory 
Black Leaf- — - 
1.70 
March 7 
Good 
Good 
Apparently 
44 
and 28 
good but not 
enough 
: -* ' 
• 
trees 
Black Leaf “40” __ 
1-600 
March 7 
Good 
• -__ 
Good 
- 
Black Leaf “40” 
1.800 
March 7 
Good 
Good 
Unsatisfac- 
Unsatis- 
and 28 
tory 
factory 
Black Leaf “40”- 
1.1000 
March 7 
Good 
— 
Nico-Fume... _ 
1-600 
March 7 
Poor 
— 
i 4 
Nico-Fume . _ _ _ 
1.800 
March 7 
Poor 
— 
4 4 
Soluble Oil 
1.20 
March 7 
Good 
— 
4 4 
Ker. Kmul. __ 
1591 1 
March 7 
Poor 
4 4 
• 
Rex Lime & Sulfur 
1.10 
March 7 
Good 
Unsatis- 
Good 
Unsatis • 
and 28 
factory 
factory 
Rex Lime & Sulfur 
1.11 
March 7 
Good 
Unsatis- 
Good 
and 28 
factory 
Lime and Sulfur . 
15-15-50 
March 7 
Good 
— 
Poor 
Unsatis- 
factory 
Black Leaf.. ) 
1.70 
3 lbs. to 
March 28 
Good 
— 
Arsenate of Lead ) 
100 gals 
Lead Arsenate - _ ) 
10 lb-100 
March 28 
Good 
— 
Black Leaf ”40” ) 
1.900 
Black Leaf ”40” ) 
1.1000 
March 2£ 
Good 
— 
Lead Arsenate-- ) 
6 lb-100 
