550 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
Comparative Results of Red Bug Sprays 
Plot Treatment Tree No. Total Apples Red Bug Per cent 
Apples_Red Bug 
I 
Pink Spray 
1 
491 
14 
2.8 
2 
1504 
33 
2.1 
3 
576 
4 
.69 
Pink and 
1 
795 
8 
1. 
II 
Petal Fall 
2 
354 
9 
2.5 
3 
373 
6 
1.6 
Petal Fall 
1 
126 
0 
.0 
III 
Spray 
2 
1213 
26 
2.2 
3 
480 
4 
.83 
IV 
Petal Fall & 
1 
138 
1 
.7 
Two & half 
wks. spray 
2 
275 
4 
1.45 
Checks 
1 
49 
7 
14.3 
2 
838 
110 
13.1 
In averaging up these results we get the following percentages: 
Pink spray 1.9% Red bug. Pink and petal fall 1.5%. Petal fall 1.64%. 
Petal fall and 2Rf weeks later 1.2%. These percentages are so small 
and so close together that there is no practical difference in favor of 
any of the spray treatments. On the basis of these results and assuming 
careful spraying, we would conclude that a single application of nicotine 
at petal fall will give excellent control without an additional spray. 
It is unfortunate that the experiment could not have included an 
earlier blooming and susceptible variety such as Grimes Golden. With 
such a variety the difference in favor of the petal fall over the pink spray 
should be very marked. 
HABROBRACON JUGLANDIS ASHMEAD AS A PARASITE OF 
PLODIA INTERPUNCTELLA HUBN. 
By E. R. deOng, University of California 
The Indian Meal Moth, Plodia interpunctella Hubn., in California 
is commonly attacked by the parasite Habrobracon juglandis Ashmead. 
Parker mentions it under the name of Habrobracon hebetor Say as 
frequently attacking this larva “but not appreciably affecting the 
infestation in California,” (U. S. Dept. Bui. 235, 1915). This parasite 
was found to be the most abundant and widely distributed of any 
attacking Plodia, in a study of insects of stored products made in 1918 
for the State Food Administrator. It was also found to breed upon a 
caterpillar recently introduced upon peanuts, Aphomia gularis Zeller. 
The life history data were from insects in close confinement and 
