- 56o - 
fasted twigs on young trees may be dipped in a bucket of nicotine 
sulphate solution, (1 tablespoonful of nicotine sulphate and a few 
tabl- spoonfuls of soap to a "bucket of water) and infested twigs tnat 
cannot be bent over should be cut off and dropped into the insecticide 
or './ashed with a sponge. 
..!___. . It* Jj» 
(2373) 
1929. * COKSTEI-BUEIOL' SCO 3HE x>ICLCGY ^ND COKIHOL OP THE &EEEH CITEUS 
APHID, APHIS SPIK aECOLA PATCH. Pla. Agr. Expt. Sta. Bull. 203, 
pp. 431-475, illus. [Abstract in Hev. Appl. Ent. (a) 18; 371-372. 
1930.] 
ITicotine sulphate (1:300) with l/2 to 1 percent soap solution 
gave 99 percent mortality. A dust of 7 l/2 lb. nicotine sulphate to 
100 lb. lime (3 percent dust) killed 99.8 percent. 
GrAidBEELL , jC. L. 
(2374) 
1932. STUDIES OP S0:.E IHS-jCTS CP jtitfEHGEEEiTS. Hat. Shade Tree Com"., 
Proc. pp. 89-93. [Abstract in Hev. Appl. Ent. (A) 21: 316-317. 1933.] 
Satisfactory results against. the spruce gall aphid, (Che rmes 
( -o.d e l ; :es ) abiet is L. ) , and Sitka gall aphid (C. ( Gillettea ) coo l eyi Gill.] 
nay b^ obtained with a single application of 1 pt. nicotine sulphate 
and 5 lb. soap to 100 gal. water. Ilie nicotine spray is most effective 
at 50 c i'. or over. An application during late autumn or early spring 
of a 2 percent; nicOuine-liue dust apparently afforded good protection 
against C. abietis . 
PHI END, H. 3. , and i.ALDEN, n. H. 
(2375) 
1925. EXPEDIENCES III DUSTING TO KILL PEa APHID, CABBAGE APHID *KD CNK 
TH-.IPS. Conn. Agr. Sxpt. Sta. Bull. 265, pp. 319-320. [Abstract 
In. Eov. *±>pl. Er.t. (a) 13: 415-416. 1925.] 
ITicotine dust (3 percent) applied at the rate of 50 lb. per 
acre oetxjeen 7:00 a.m. and 1:00 p.m. almost entirely eliminated 
Bre vicoryne brass icae L. ITicotine dust (2.75 percent) at the rate 
of 140 lb. per acre killed 89 percent of Illinoia pis i Kalt, but a 
heavy application of this dust showed little control of Tkrips t abac i 
on onions. 
PATCH, E. L. 
(2376) 
C, 
1927. TEE PEa APHID IN .AltfE. ...aine Agr. Expt. Sta. Bull. 337, pp. 9-20, 
illus. [Abstract in Hev. Appl. Ent. (A) 15: 394-395. 1927.] 
Por the control of Illinoia pisi Ka.lt. on peas a dust containing 
3 percent nicotine with hydrate d lime as the carrier has proved satis- 
factory though other carriers such as sulphur or gypsum have given good 
•results. 
