- gq - 
Cube with pyrcthrum and pulfui- was tri?d ag'^inst thi? boll weevil 
with the following results t 
Material Mo r t al i ty Control 
Percent Percent 
Pyrethrum-cube-sulfur 10:10: ?0 "^ 9 
Pyrtthrxim-sulfur Uo:6o 36 12 
Pyreithru-Ti (O.76 percent total 
pyrethrins) 37 1^ 
Checks 27 
Anthonomus mugculus Say^ the cranberry v^eevil 
In 1937 the •"'apsachusetts Agriciiltur-^l Eyperiment H^tion ( 277 ) 
reported that 100 -oounds of derris dust (l percent of rotrnone) per 
acre, applied on June 5, g^^'c a poor '.'ill of the cranberry vreevil. 
A spray of 8 pounds of derris povrder (U percent of rotenone) and 
U pounds of fish-oil soap in 100 gallons of v/ater, used at the rate 
of ^00 gallons per acre, failed to give a good kill. In 1938 this , 
station ( 278 ) reported that at the Cranberry St'-^tion, East Wareham, 
%ss., a spray of 15 pounds of derris powder (U percent of rotenone) 
and 1/2 pound of Areskap in 100 gallons of water, used at the rate 
of UOO gallons per ?>cre on August 3, failed to give a good kill ,of 
the cranberry weevil. • "'■' '"'-.. 
Arthonomus porno rum (L.), an apple blossom weevil 
Tests of derris iust to prevent oviponition- vrere. of sufficient 
promise to justify further trials. — East Mailing Research Station 
( ill ) in 19 ^.U. 
Hey, Mqo.Rce, and Sterr (I86) in 19'^U reported a test made in Kent, 
England, to control the ppplo blossom weevil. A proprietary derris 
dust of somewhat heavy type, containing 0.1"^ percent of recrystallized 
rotenone, was tested, ^'^en aptjlied at the grern-bUd stf>ge it h?l"ed 
the injury causf.d by the apple blos«!om weevil, but had no sppreciacle 
effect if applied a wrek carli'-r. 
The East Mailing ^rs^nrch Station (n2) in 1Q^5 reported dusting 
and sprfiying tests with 6.erris. Steer and Thom^p of tMs station reported 
that derris dust (lO parts o'f derris powder of 3«63 percent crude roten- 
one plus 90 parts of china clay) reduced the amount of capping by the 
apple blossom weevil 50 percent. It was concluded that derris dusts, 
in two consecutive seasons' ti'ials, ha.'^'^e given promising results, but 
to obtain a £;ntisfactory measure of control if would prob?ibly be nec- 
essary to make se^^eral applicfitions and renevr the dust deposit whenever 
it is washed off by rain, A dorris dust gave promising results in 
preventing ovipo-^-ition but wrpth^-r conditions impose a limit to the 
degree of control that cnn be obtained witi; it. 
