= Ope 
life history of Phylloxera devastatrix Perg., a subject about which 
much uncertainty has existed. He observed that on emergence from the 
galls the winged forms deposited large numbers of eggs. The forms hatch— 
ing from these eggs migrated downward toward the trunk and apparently 
congregated beneath rough bark, where they remained and turned reddish— 
brown in color. The bodies of most of them contained a single egg each. 
These forms apparently remain in this condition until development is 
resumed when the pecan buds open the next spring. 
Pecan nut case bearer controlled by nicotine combinations.--G.F. 
Moznette, in charge of the Albany, Ga., nut-—insect laboratory, reports 
a high degree of control of Acrobasis caryae Grote from applications 
of nicotine sulphate in various combinations. The results are summarized 
as follows: 
Treatment Infested nut clusters 
ee en SEY ee Se 
ee en a et eS ce ae ET a NE NE EE a OT Tc EE TR CN CN AE EE eT EE A IE EO EE EE TT TT ET cm 
Percent 
Nicotine sulphate 1-1,000 
with Bordeaux mixture 3-4-50.... Sak ee hee 0.46 
Nicotine sulphate 1-1,000 with white oil 
emulsion (Volck Junior) 3/4 percent..................0.. 0.42 
White oil emulsion (Volck Junior) 3/4 percent... 3.33 
White oil emulsion (Volck Junior) 1 1/2 percent.. PANS, 
Nicotine sulphate 1-1,000 with white oil emul- 
sion (Summer—emulsion light) 3/4 percent............. 0.50 
Nicotine sulphate 1-1,000 with white oil emul- 
sion (Verdol)»S/4 percents, ee ee Oro 
White oil emulsion (Verdol) 1 1/2 percent.............. 1.55 
Nicotine sulphate 1-1,000 with fish oil 1/4 
DOL CONG Aes eee ee eer ee ets oan 0°52 
Checks (average of 4 plats), o0.......-1) . eee eee 5.51 
Rearing and utilization of Trichogramma for control of pecan nut 
case bearer.~-With the use of recently developed technique (described 
in the Monthly Letter, January 1933) the production of Trichogramma has 
reached a high stage of efficiency. Herbert Spencer and Luther Brown, 
who are conducting this work at Albany, Ga., report as follows on their 
laboratory production of eggs of the Angoumois grain moth (Sitotroga 
cerealella Oliv.) for this purpose during 1933, as compared with previous 
years. In 1931, a total of 24,614,500 eggs, with the peak of production 
(10,480,000) in June; in 1932, a total of 20,523,000 eggs, with the peak 
