118 ' DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
TaBLeE I.—Treatments and dates of applications of sprays for the codling moth and plum 
curculic. One-spray method. Siloam Springs, Ark., 1909. 
Dates of applica- Plat I. Plat II. : 
tions. (One-spray method.) (One-spray method.) 
First _ application, | Drenched witharsenate oflead. 1 pound | Drenched with arsenate of lead. 1 pound 
ape 24-25 (after to 50 gallons of water. Bordeaux noz- to 50 gallons Bordeaux mixture (3-3- 
falling of petals). zles. 17 gallons per tree. 200 pounds 50). Bordeaux nozzles. 17 gallons 
pressure. per tree. 200 pounds pressure. 
Second application, | Bordeaux mixture only (4-4-50). Bor- | Bordeaux mixture only (44-50). Bor- 
May 25-26. deaux nozzles. 5 deaux nozzles. 
Third application, |... .-. Oe tteee ae act oeinsasetecaine seanenee Do. 
July 2. 
Fourth application, | Unsprayed...-.-..-----<--.-2---<se---= Unsprayed. 
July 22. 
Fifth application, |..--- OE He aoe ccc eee nen eee Ser Do. 
August 10. 
Dates of applica- Plat III. Plat IV. Plat V. 
tions. (One-spray method.) (Demonstration. ) (Unsprayed.) 
First application, | Drenched with arsenate of lead.| Not drenched. Vermorelnoz- | Unsprayed. 
April 24-25 (after 1 pound to 50 gallons of water. zles. Mist spray, arsenate 
falling of petals). | Vermorel nozzles. Mist of lead. 2 pounds to 50 gal- 
spray. 8.3 gallons per tree. lons Bordeaux mixture (3- 
200 pounds pressure. 3-50). 11 gallons per tree. 
200 pounds pressure. 
Second application, | Bordeaux mixture only (4-4 | Bordeaux mixture (4-450) Do. 
May 25-26. 50). Mistspray. Vermorel with 2 pounds arsenate of 
nozzles. lead. Mist spray. Vermo- 
: rel nozzles. 
Third application, |.-.---. doteeece MS Saget aoe Bordeaux mixture (44-50) | Bordeaux mixture 
July 2. with 2 pounds arsenate of only (4-4-50). 
lead. Mistspray. Vermo- 
rel nozzles. 
Fourth application, | Unsprayed...-......--..------|----- GOei5s Bee ce eee ace Unsprayed. 
July 22. 
Fifth application, |..--- 0) oe Ere cE aa cerermorn. Doser GOs25 eee eeisace see eeeoee Do. 
August 10. 
Plats I, II, and IIT received an arsenical treatment of 1 pound of 
arsenate of lead to 50 gallons of water immediately after the falling 
of the petals. Two subsequent applications of Bordeaux mixture 
only were made to protect the fruit from the apple blotch and bitter 
rot and one Bordeaux treatment was also given to the check plat 
(Plat V) for the same purpose, as these affections in this locality are 
exceedingly troublesome and otherwise would have interfered 
greatly with results. Plat IV, which received demonstration treat- 
ment, received five applications in all, as shown, of a combined spray 
of Bordeaux mixture and arsenate of lead, the latter being used at 
the rate of 2 pounds to 50 gallons of spray. On the demonstration 
plat the usual eddy chamber, or Vermorel nozzle, was used and while 
an effort was made to spray thoroughly according to usual recom- 
mendations in the East, the drenching of the trees was carefully 
avoided. Plat I, which received the one-spray treatment proper, 
was very thoroughly treated and required an average of 17 gallons 
per tree. The Bordeaux nozzle was used with a crook between the 
nozzle and spray rod and a pressure was maintained at about 200 
pounds. Plat II received exactly the same treatment except that 
arsenate of lead was applied in dilute Bordeaux mixture to determine 
