~ 104 - 
C. A. Thomas ( 366 ) in I-la.Y 19^0 r<'vievrcd wor^c done to control wirev^'orms. 
Reference was m^-de to the reports of Lacroix (253) and of Morrill and Lacroix 
(289 ) . ... 
Galcrucidac 
Agelastica alni (L.), an alder 'beetle 
Jancke (222) in I93I+ reported the results of tests with derris and 
other insecticides against the alder "beetle in Germany, An acetone extract 
of derris, at concentrations of 01., 0.2, O.U, and 1.0 percent, and powdered 
derris root applied as a dust killed all third ihstars and also the adult 
iDeetles, 
Trappmann, f3,nd Kitsche ( 375 ) inl935 tested a rotenone-talc aus't (0.I5 
percent of rotenone) • and a spray containing 0.15 percent of rotenone vrith Tur- 
key rod -oil o6n- larvae of the dl.der "beetle under laboratory conditions. In 
all caBes the dosage vras regulated to give a deposit of 0.18 mg. of rotenone 
per. 500 cm. ^i' The dust caused SO-percent mortality in 8 days; the spray, 
9.5 percent. 
Excellent control of this insect was obtained with derris dust. Field 
tests were made with. g;j,'p sum (specifiq gravity 1.25), talc (specific gravity 
1.1), and; kieselguhr. (specific- gravity 0,6) as carriers for derris. The mix- 
tures contained 0^.5 percent of rotenone and 1.2 percent of eth'~r extractives. 
Talc prpivrd to "be the "best carrier. — De Bussy et al. (61) in I936. 
The destruction of the alder beetle "by derris in the Ncth-'r lands vras 
general practice in I936. — Krloniaal Instituut of Amsterdam (l2, 1_^), in I936, 
One of the principal uses cf derrig in the Netherlands is for the con^ 
trol. of this beetle.— -Van dcr Laan ( 252 ) in I936. 
Controlled "by a dust containing 0,5 "oercent o*f rotenone. — Anonymous 
(2) in 1937. 
This is one of the principal insects combated with derris preparations 
in the Netherlands. — Koloniaal instituut (lU ) in I938. ' 
" . Lyctidae 
Minth.ea rugicollis (Walk.) 
Feeds on derrig roots in storage, — Corbett (8_6) in I93I; Federated 
Malay States Department of Agriculture '(igU) and Miller ( 285 ) in 193^." 
Mcloidao 
Epioaut-?. gorhami Ma^f. 
., K^tsu'aata (23U) in IQ38 reported that this meloid, whioh attacks' 
various crops in Japan, is, faitly rcsi-^tant to derris inseoticides. 
