_ qU - 
1 Otiorh^Tichus i Brachyrhinus ov.tup (L.)^ the •str-'^.vr'bfrr;'' root we^i'^^'il 
Resistant to derris. — Anonj^.ous (2) ir: 1037. 
Eraqhy;rhinup singulpris (L,), a clr/'-colorod v/revil 
Kearns and Umpleby (2Ul ) , of the Long Ashton ReROP.rch Station, England, 
in 1937 roported that graft<^. c^n "br, offpcti^Tly protected from weevil injury 
iDy literally painting then vrith a mixture consisting of 1 poiind of derris 
or groimd "barbasco root containing not le?,? than 1,5 percent of rotennne, . ■ 
pl\is 2 pounds of lead arsenate powder (or U po\mds of paste or 2 quarts of 
colloidal), plus h ounces of size'. The derris and arsenate should he nixed 
with water to a consistency of thicl' cream and to this mixture the size n.ided 
(previously soaked- in 1 pint vrarrn water). The grafts should "be painted ^iu^t 
prior to "bud "burst, and in some seasons a second application may "be necessary, 
as the leaf wee^'-ils feed over a long period. These weevils are the clay- 
colored weevil^ "Otiorrhynchus" si'ngularis f Bra chy r h i nii s singuj^aris (1.), 
according -to Muese"bcck] prA the le^f-eating weevils PhyJlobius pyri and P, 
o"blongus . 
Brachyrhinus sulcatus (F.), the blac^' v.ine vre'evil 
( Otiorrhynchus ) Brachyrhinus sulcr^tus is not affected by derris.— 
Van der Laan (252) in 19-^6. 
Calendrg sp., cor:T billbugg 
Not affected by derris. — Van der Laan (252) in I936. ■ 
Caulophilus latinasus (Say) 
The adult is not susceptible to derris. — Craufurd-Benson (^O) in l'^'J)S , 
Ceutp rhyn chus assimilis (Payk.), the cabbage s-^edpod v^eevil or turnip-seed 
weevil 
The Seale-Hayne Agricultural College , England (j^) in 1933 stated 
that no definitely successful control measures for the turnip-seed weevil 
attacking seed pods of broccoli are known, but that spraying with sprays 
containing derris or pyrethrum, =!uch as are us^'d in the control of the 
raspberry beetle, v.rould probably succeed, 
Ceutorhy.".chus macula -alba (Hbst.), a poppy vrcevil 
Szelcnyi ( 162 ) in I935 rv^ijorted that of insecticdes tested for the 
cont^-ol of a poppy wee-^il in Hungary, the best results were obtained with 
a derris Trenaration applied during the flowering period. 
C eut(;) rhynchus plf^urosti pna (Marsha.m), a turnip gall weevil 
K. M, Smith ( 3U3 ) in 1925 reported that tnpts were male with various 
insecticides for the control of t^^e turnip gall vreevll. A mixture of 1 
ounce of derris vdth 2 ovmces of soot per sauare yard did not give results 
promising enough to justify further trials with it. 
