90. OEAUFuRD-BSiTSOi^y, H..J. • '' ■ . 
193s.. The selection of a stc?.ndard insect for the laboratory testing 
'of insecticides. Bui. Snt. Res. 29:119-123, 
91. CROSBY, C. R., and CirOPP, C 
, 193^' The control of diseases and insects' affecting vegetable 
. crops on Long Island. N. Y. Agr. Col'. (Cornell) Ext. 
'Bui. 278, 87 pp., illus. 
92. CFiPP, C, and LEIBY, R. W. 
1939» The control of diseases and insects affecting vegetable 
'crops on Long Island. N. Y. Agr. Col, (Cornell) Ext, 
Bui. 278, rev.,' 116 pp., illus. 
93. CRUi'3,, S. E. 
1935* Efficiency of insecticides against raspberry fruitworm, 
U.. S.' Dept. Agr., Bur. Snt. and Plant Q,uar. Kews Let. 
■ 2(12): 19. [Processed,] 
9U.- 
193^' Insecticide program f dr. raspberry fruitworm control. -U. S, 
, Dept. Agr., Bur. Ent . and Plant '^uar. E-l+33, 3 pp. 
[Processed.] 
95. DAillSLS-, G.-W, 
1905. . A plea for the scientific study of native -drugs and poisons. 
Malaya Branch 'Brit . Med. Assoc, Jour. [Singapore] (n.s.) 
2:3-5. [Reviewed in Brit. Med. Jour. 2373:lU75. I906] 
96. DARL3Y, M. M. ' ' ' 
1931' Some comparative tests with rotenone, nicotine, and pyrethrum. 
Jour. Bcon. Ent. 2i+:lll-115, 
97. ' DAYIDSOIT, ¥. M. 
1930- Rotenone as a contact, insecticide. Jour, Econ, Ent. 23:868-87^. 
98. DAVIES, W. M. 
1937, Prclininary tests with' slate-dust for the control of fleabeetles, 
Welsh Jour. Agr. 13:317-320.' • ' 
99. DAVIS, J. J, . ■ , ' • 
1936. Crop protectioif institute circular compiled by J. J. Davis, 
Purdue Uni-«,./10 (6 and 7):3« [Processed,] 
100. DgOUG, E. R. ■ , ■ • 
1930. The comparative insecticidal value of differ-cnt species of 
derris. Jour. Bcon. Ent. 23:6l9-62U. 
101. DESATi^iARD, P. ' ^ ■ " - • 
1939. Les produits i. base de roteno-nc et lour perf octionnement. 
Rev. de Vitic. U6 (2338) : 327-330. 
