- 590 - 
( Frankliniella occidentalis ?erg.) in lucerne fields. In tests, 4 and 
6 percent home-made nicotine dust gave fairly satisfactory control of a 
light infestation of .aphid s ( Macro sip hum (illinoia) pis i Kalt.) in al- 
falfa fields. 
McLean, r. e. (2478) 
1931. insect pests and plant diseases op the avocado in california. 
Calif. Dept. Agr. Monthly Bull. 20 (7).: 442-446, illus. .[Abstract 
in Rev. Appl. Ent. (A) 19: 653. 1931.] 
Control measures against thrips ( Heliothrips haemorrhoidali s Bch. 
that include the use of nicotine either as a dust or as a spray with 
a spreader have given the most satisfactory results, but as the eggs 
are not killed, two or three applications should be made at intervals 
of 8 to 12 days in summer, and 14 to 30 days in winter. 
HOWARD, L. 0. (2479) 
1923. REPORT OF THE ENTOMOLOGIST. U. S. Dept. Agr. Bur. Ent. Ann. 
Rept. 37 pp. [Abstract in Rev. Appl. Ent. (A) 12: 165-167. 1924.] 
Nicotine dust has been proved to be ineffective for the control 
of the citrus thrips ( Scirtothrips citri ) . Against Dicyphus se-oaratus 
(tomato suckfly) in Texas from three to five applications of nicotine 
sulphate dust are required. Turnip aphis ( Aphis ( Rhopalo siphum ) pseudo - 
brassicae ) is effectively checked by nicotine dust. 
SMITH, J. H. (2480) 
1934. BANANA THRIP AND THE PROBLEM OF ITS CONTROL. Queensland. Agr. 
Jour. 40 (6): 508-524; 41 (l): 5-29, illus. Brisbane; also Bull. 
Div. Ent. Plant Path. Dept. Agr.. Queensland, No. 9, 41 pp., illus. 
Brisbane. [Abstract in Rev. Appl. Ent. (A) 22: 264. 1934.] 
Weekly dusting with nicotine gave fairly good control of un- 
usually severe infestations of Scirtothrips signipennis Bagn. A 
dust of free nicotine and hydrated lime should be applied with a rotary 
duster. 
HENDRICKSON, A. H. (2481) 
1921. PRUNE-GROWING IN CALIFORNIA. Calif. Agr. Expt. Sta. Bull. 1328, 
38 pp., illus. [Abstract in Rev. Appl. Ent. (A) 10: 213-214. 1922.] 
A 5 percent strength of Nicodust is recommended for the control 
of the pear thrips ( Taeniothrips inconsequens ) . For an average prune 
tree 1/3 to l/2 lb. will be sufficient and the application should be 
made between 9:00 a.m. and 6:00 p.m. A liquid spray of 1 1/2 percent 
oil emulsion adding 1 pt. Black Leaf 40 to every 200 gal. has also 
been fairly satisfactory. 
