TZ MISC. PUBLICATION 198, U.S. DEPT. OF AGRICULTURE 
Pettit, R. H.—Continued. (906) 
HESSIAN FLY. Mich. Agr. Expt. Sta. Cire. Bull. 49, 8 pp., illus. 1922. 
Life history and work of insect; control, with table of fly-free dates. 
(907) 
COMMON PESTS OF FIELD AND GARDEN CROPS—-HESSIAN FLY (CECIDOMYIA 
DESTRUCTOR). Mich. Spec. Bull. 132: 38-42, illus. 1924. 
Food plants; life history; control, with table of safe seeding dates. 
(908) 
COMMON PESTS OF FIELD AND GARDEN CROPS (REVISED) HESSIAN FLY (PHY- 
TOPHAGA DESTRUCTOR). Mich. Spec. Bull. 183 : 65-69, illus. 1929. 
Food plants; life history; control, with tables of safe seeding dates. 
Puituirs, W. J. (909) 
REPORT ON ISOSOMA INVESTIGATIONS. Jour. Econ. Ent. 10: 140. 1917. 
Comparative injury by Jsosoma and Phytophaga discussed. 
(910) 
THE WHEAT JOINTWORM AND ITS CONTROL. U.S.Dept. Agr. Farmers’ Bull. 
1006, 14 pp., illus. 1918. 
Rank, as pest, of fly and jointworm in certain sections of the United States, 
p. 4. 
(911) 
STUDIES ON THE LIFE HISTORY AND HABITS OF THE JOINTWORM FLIES OF THE 
GENUS HARMOLITA (ISOSOMA), WITH RECOMMENDATIONS FOR CONTROL. 
U.S.Dept. Agr. Bull. 808, 27 pp., illus. 1920. 
Similarity of control for jointworms and fly, pp. 23-26. 
and Poos, F. W. (912) 
LIFE-HISTORY STUDIES OF THREE JOINTWORM PARASITES. Jour. Agr. Research 
21: 405-426, illus. 1921. 
Discussion of Eupelmus allynit French. 
—— and Poos, F. W. (913) 
TWO HYMENOPTEROUS PARASITES OF AMERICAN JOINTWORMS. Jour. Agr. 
Research 34: 473-488, illus. 1927. 
Discussion of two insects also parasitic on fly. 
Pieasants, T. S. (914) 
[HESSIAN FLY.] Amer. Farmer (4) 4: 274-275. 1849. 
Description, origin, and habits; fly the cause of a great revolution in culture 
of wheat; fertilizing and late sowing for control. 
Poos, F. W. See Puiuurrs, W. J. 
Porenogr, E. A. \715) 
HESSIAN FLY. [CECIDOMYIA DESTRUCTOR say.] Kans. State Agr. Col. 
Press Bull. 101, 1 p. 1901. 
Summary. 
916) 
SOME INSECT ENEMIES OF WHEAT IN KANSAS. Kans. State Bd. Agr. [Quart.] 
Rpt. 21 (81): 110-116. 1902. 
Remedies; preventives; quotes Webster on control. 
1 
PREVENTING HESSIAN FLY DAMAGE. Orange Judd Farmer 35 (8): 143. 1908. 
Brief popular discussion of habits; control by late sowing; recommends 
October 5 for central counties of Kansas. 
(918) 
PREVENTIVE WORK AGAINST THE HESSIAN FLY (CECIDOMYIA DESTRUCTOR SAY). 
Kans. State Agr. Col. Press Bull. 128, 1 p. 1903. 
Control. 
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PREVENTIVE WORK AGAINST THE HESSIAN FLY. Kans. Agr. Expt. Sta. Bull. 
136: 151-153. 1906. 
Infestation in Kansas; control. 
