18 BULLETIN 554, U. S. DEPARTMENT OF AGRICULTURE. 
For those who undertake the sanding method of controlling 
girdlers it should be borne in mind that there is some risk, attendant 
upon this practice, of increasing the fungous troubles of the fruit, 
and one should be prepared to spray sanded bogs with a fungicide 
such as Bordeaux mixture. 
Experimental work is not altogether conclusive as to the thickness 
of the coat of sand which will prevent emergence of the moths from 
cocoons. Franklin (11, p. 19) found that an even covering of sand 
1 inch in thickness effectually prevented moth emergence in small 
cages, while the writer’s data, obtained in a mosquito-bar cage 
placed on a cranberry bog, lead him to conclude that an even coat, 
1 inch in thickness, will not be obtained by the grower in the actual 
practice of sanding and that considerable numbers of moths will 
emerge through the sand. 
The sanding experiment performed at Whitesbog, N. J., was 
essentially as follows: Three plats were laid off where the vines 
showed severe injury and where, in fact, they had been killed over 
a considerable extent. Two of the plats were sanded fairly evenly 
on November 23, 1914, the depth varying from an inch to an inch 
and a half. The winter flowage was put on in December and re- 
moved. May 8, 1915. The same day three cocoons were removed 
from beneath the sand in plat 2, and on May 10 two cocoons were 
dug out, all of which contained live larve. A tight mosquito-bar 
cage (Pl. II, B) was built over the three plats a few days later, 
and emergence of moths was first noted June 10, 1915. 
TABLE VII.—Emergence of moths of the cranberry girdler in sanding si i Se 
ment at Whitesbog, N. J., 1915. 
Number of moths emerged. 
Date. Plat 1, Plat 2, Plat 3, 
area, 173 area, 248 area, 239 
square feet, square feet, square feet, 
sanded. check. sanded. 
Tete t= 2 Aen PRs Pe SSS ed RS. AI See 4 12 0 
SUT TTI Gy A 1 ee Ne sie ol pr oo ee ee 7 4] 0 
Fred Pa PGh _ shoe hk Bie ET eS a Sk ee BA ee 10 34 1 
AEE TEL }t Cs ep Ea REE OES oc Cee ny mee ae uy per emer Sama 41 64 12 
Wine dhs 22S See Se ea ae OR Ee oc Ree es ae 18 3 3 
STATI CMs 2 me er ge oe ae ye ce eh ed 21 9 
THe 252 See oS Se? Se CRSP MELEE LER EC eee ee ce nte eee 4 1 5 
ATT a7 ARSE See SR De eee er Se Se ae Ne eee I See ) 0 1 
Diy Beret eee Sao Ree eee ee a. See. Seen ae ee Oe Sete ee 1 0 0 
POtAlS 2 A wee le A ee EE Se. Pee eee ee 106 160 31 
Owing to the distance of the cage from the field laboratory it 
was not practicable to remove and count the moths each day. The 
data show that the greatest number of moths emerged from the un- 
sanded plat, which was also the largest plat, but that 1.55 moths 
