118 
DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
TaBLe I.—Treatments and dates of applications of sprays for the codling moth and plum 
curculio. 
Dates of applica- Plat I. 
tions. (One-spray method.) 
First application, | Drenched with arsenate of lead. 
April 24-25 (after 
falling of petals). 
Second application, 
May 25-26. 
Third application, 
July 2. 
Fourth application, 
July 22. 
Fifth application, 
August 10. 
Dates of applica- 
tions. 
to 50 gallons of water. 
zles. 17 gallons per tree. 
pressure. 
Bordeaux mixture only (44-50). 
deaux nozzles. 
First application, 
pel 24-25 (after 
falling of petals). 
Second application, 
Bordeaux noz- 
200 pounds 
1 pound 
50). 
per tree. 
Bor- 
deaux nozzles. 
One-spray method. Siloam Springs, Ark., 1909. 
Plat II. 
(One-spray method.) 
Drenched with arsenate of lead. 1 pound 
to 50 gallons Bordeaux mixture (3-3- 
Bordeaux nozzles. 
17 gallons 
Bor- 
200 pounds pressure. 
Bordeaux mixture only (4-4-50). 
noses GO’) kaso euce wom sect oe sc one scores Do. 
Wnsprayeds 2.25. st eh eo. 22 See Unsprayed. 
eee GOs Se S53 Hasse eas seen cae se ae eee Do. 
Plat III. Plat IV. 
(One-spray method.) 
Drenched with arsenate of lead. 
1 pound to50 gallons of water. 
Jermorel nozzles. Mist 
spray. 8.3 gallons per tree. 
200 pounds pressure. 
Bordeaux mixture only (4-4— 
(Demonstration. ) 
Plat V. 
(Unsprayed.) 
Not drenched. Vermorel noz- 
zles. Mist spray, arsenate 
of lead. 2 pounds to 50 gal- 
lons Bordeaux mixture (3- 
3-50). 11 gallons per tree. 
200 pounds pressure. 
Bordeaux mixture (44-50) 
Unsprayed. 
May 25-26. 50). Mistspray. Vermorel with 2 pounds arsenate of 
nozzles. lead. Mist spray. Vermo- 
rel nozzles. 
Third application, |...-- GOs: As iette canoe eeees Bordeaux mixture (44-50) | Bordeaux mixture 
July 2. with 2 pounds arsenate of only (4-4-50). 
lead. Mist spray. Vermo- 
- rel nozzles. 
Hourthiapplication, || Wnsprayedssec---.-srs.2 ase laceee GOs. 2 Sockoae co eeees cece Unsprayed. 
July 22. 
Fifth application, |----- Once s eget eos te see eee GOs. ss eeneseeaepae tees Do. 
August 10. 
Plats I, II, and III 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 
