-59- 
Garman concluded: ."It will be seen from the data presented that 
there was no significant difference in the amount of infested or injured 
fruit from any of the treatments. Separation of the types of injured 
fruit into old and new did net afford any more favorable data in regard 
to sprays." 
Stearns ( 595 ) in 1958 reported on experiments with the following sub- 
stances, listed in order of efficiency: Lead arsenate, phenothiazine, 
cryolite, tetramethyl thiuram bisulfide, and derris, used, respectively, at 
the rate of 2, 4, 5, 4, and 4 pounds per 100 gallons. In each case, 6 
pounds of magnetic sulfur was added as a fungicide, 1 pound of rosin resi- 
due was added to all the spray mixtures except cryolite, and 4 pounds of 
zinc sulfate and 5 pounds of hydrated lime were included with lead arse- 
nate. Three applications were made, one immediately after petal fall, one 
at the shuck-slip stage, and one a fortnight later. Lead arsenate gave 
slightly better control than the other materials. 
Laspe yresia nigricana (Steph. ), the pea moth 
Miles ( 276 ) in 1926 reported good control with the use of a derris 
spray consisting of 20 pounds of powdered derris to 100 imperial gallons 
of water. This spray produced the lowest percentage of damage (16 per- 
cent) in the threshed p - efts. The percentages of damaged peas harvested 
from plots sprayed with derris or nicotine showed little difference from 
those observed when the green peas were examined; these sprays, therefore, 
seem to have a permanent effect, 
Mel iss opus latif erreanus (iHsm, ), the filbert moth 
Thompson ( 412 ) in 1958 summarized results cf spray tests in 1957. 
This is the most important filbert insect pest in Oregon at present. Many 
sprays and three dusts, including Cubor (0,75 percent rotenone), were 
tried for control. Results were as follows: 
Material Worms 
Percent 
Lead arsenate plus soap 0,99 
Cubor dust 8,6 
Unsprayed chock 25,5 
Olcthroutes pruniana (Hbn. ) 
A product containing 12 percent of powdered L onch oca rpus nicou root 
(6 percent rotenone) and 88 percent of talcum killed ( Pur.thina) Olethreutes 
p runiana on cherry and plum, and repelled it on apple, according to a let- 
ter from Eta'blissements Rotenia to R. C. Roark in 1958, 
" lychroni s botrana (Schiff.) 
See Janoke and Roosler ( 220 ) under Phalonia ambiguc lla (Hbn. ) on 
page 100. 
