- 14 - 
Kearns, harsh, and Martin (_5l) in 1936 reported tests in England 
with the following: 8 ounces of nicotine, 1.5 gallons of lime-sulfur, 
1 pound of sulfonated Lorol to 100 imperial gallons of total solutions 
1.2 ounces of rotenone, 1,18 pints of acetone, 1,5 gallons of line- 
sulfur, 1 pound of sulfonated Lorol to 1.00 gallon's of total solution. 
The rotenone spray was prepared by the addition of an acetone solution 
(5,13 percent) of rotenone to the dilute lime sulfm'- sulfonated Lorol 
solution. The washes were applied in drenching amounts on Lay 17, 1934, 
each to 4 trees selected at random, 4 other trees being left unsprayed 
as control. Immediately after spraying, small numbers of capsid nymphs 
and half-grown winter-moth larvae were collected from the sprayed trees 
and kept under observation, i.;any of the insects collected from the 
rotenone- sprayed trees remained active for an hour but paralysis then 
set in, and 15 hours later all the capsids and larvae were moribund. 
The nicotine wash proved equally effective insofar as the capsids were 
concerned hut about half of the winter moth larvae recovered and con- 
tinued normal feeding. The set of blossom on the trees was satisfactory 
and the total number of caps id-marked and clean fruit on each tree was 
ascertained during the third wee 1 : of August. The results show that 
nicotine and rotenone, at the respective concentrations used, were 
equally effective when applied in conjunction with lime-sulfur and sul- 
fonated Lorcl for the control cf the' apple .capsid, 
Fsallus scriat us (Eeut.), the cotton flea hopper 
The Texas Agricultural Experiment Station (84) in 1925 reported 
that a spray of Derrisol reduced infestation by the cotton flea hopper, 
but sulfur dusts gave better results. 
Swing (19) in 1935 reported rotenone dusts to be ineffective. Cube 
powder (4 percent rotenone) gave a control of 9,7 percent oft adults and 
14 percent of nymphs. 
Ewing (20) in 1936 reported the results of cage toxicity tests 
with 20 dusting materials against the cotton flea hopper. Results with 
cube and devil ' s-shoestrings (rotenone 1,7 percent, total carbon tetra- 
chloride extractives 7,5 percent) wore as follows: 
Insecticide 
Pyre thrum- cube- sulfur (10:10:80)- - - - - - 
Devil' s-shoostrings- sulfur (23.5:76.5) 
Devil 's-shoestrings-sulfur (47:53)- - - - - 
Devil ' s-sho: strings-sulfur (94:6) ------ 
Untreated checks!/- ------------ 
Mortality 
Adults 
Percent 
F5.0 
11.8 
9.2 
8.4 
6.0 
Uymphs 
Average 
crccnt 
67.0 
Percent 
~TT.0~" 
63.8 
57.8 
42.2 
25.7 
20. 7 
17.6 
11.0 
8.5 
l/ Average mortality among 865 adults in 18 cages and 998 nymphs in 21 cage 
