- log - 
Mg.ladpra holosericea (Scop.) 
Neunann (2Q5,) ^^- 1937 reported th:^,t in r'>.tto.'npt^ to control thi? "beetle 
derris dusts gave no results. 
Melolontha sp. 
A rotenonp sprav applied at th;"^ rate of 0,18 mg. of rotononc- per 500 
cm. ^/killed none of the larvao of this "bertlc within S days. — Trappmann 
and Nitsche ( 375 ) in 1935. 
Oryctes nasicornis (L.) 
2 A rotenone: spray applied at the rato of O.IS mg. of rotenc^^.e pp.r 500 
cm, ..'killed nc'-.e of the larvae of these insects within S days. — Trappmann 
and iJitsche (37,5) in 1935. 
Phyllopertha horticola (L.), a cockchafer 
Berris dust and lead arsenate spray were' ineffective against the cock- 
chafer.— East Milling Research St-.tion ( 112 ) in 1935. 
Ph;i.'-llophaga hirticula Knoch 
The Ifedison, Wi?;.^ la"boratory of the Division of Cereal and Forage 
Insect Investigations of the Bureau of Entomology and Plant Quarantine in 
a Quarterly report in 1937) reported tests made "by Fltiicr^ Seaton^ and Chamber- 
lin with insecticides against this species.. Derris and othfr .materials were 
tried "but lead arsenate spray appeared "best. June "beetles wci*e confined in 
large tin cans, 25 "beetles in each^ containing sift'x''. soil, a vial of water, 
and treated "bur-oak folia.^ce, and all tests were run in duplicate. Checks 
were carried for each series of tests. 
Phyllo-phaga ( Phytalus ) sp. 
De Sornpy in 19^1 (^^5) suggested th^t derris 1)^ tried against the 
scara"baeid Phytalus . 
Phyllophaga spp, 
Hamilton ( 172 ) in 1937 reported that June "bugs, (Lachno^-^terna)- 
Phyllophaga spp, on oak were fairly vrell controlled "by a spray of IJ- poujids 
of derris or cube powder (U percent of rotenone) and h pounds of rosin- 
residue emulsion per 100 gallons of vrater. The spray acted as a repellent. 
The effective period was 6 days, and feeding wrs checked for 6 or 7 days. 
K. Ishigai in 1937 stated in a let'er to C. C. Cmcannon of the Bureau 
of Foreign and Domestic Commerce that Hn.y "beetles attacking thp Icfves of 
growing deri'is were driven away by spraying with ground fresh derris roots 
plus soap. 
The New Jer.-^iy State Agricultural Eyperinent Station (29g_) in 193S 
reported that June bugs were repelled from feeding for U to 8 da,yR or more 
by the application of a spray of derris or cube powder plus rosin-reoidue 
emulsion in wptcr. 
