BuprestiSae 
Chryso'bothris femorata (Oliv. ) th,^ flatheaded anple tr'^o "boror 
Johnson and Fenton ( 229 ) in 1939 reported the results cf toxicity 
tests made in Oklahoma in 1937 on cagc-omergrd adults of the flatheaded 
apple tree "borer. Derris (5 percent of rotencne) at 2 pounds p'">r lOQ. 
gallons + casein spreader killed 100 percent in 5 days. Lead arsenate 
must "be used at the rate of S pounds per 100 gallons to ensure 100-p'^r- 
cent mortality in 5 days. 
Gryptodactylus gracilis Schoenf , 
Matsu'bara (ggl ) in 1937 recommended spraying with Neoton (derris 
extract in fish oil) for the control of this "buprestid, which ig widely 
distributed on chestnut in Japan. 
Byturidae 
Byturus tomcntosus (Deg,), a raspberry and loganberry "beetle 
The East Mailing Research Station of Kent, England (l07 ) in 1930 
reported that a derris-rcot preparation had hern tried for the control 
3f the raspberry and loganberry beetle, but so far without success. In 
1930 this station (108) reported that the proprietary derris-ro^t prepa- 
ration us«d in previous trials without conclusive results was again used 
and showed considerable promise. Further trials are being planned on a 
statistical basis. • ' 
In 1931 the East Mailing Research Station (I09 ) reviewed its work 
on the loganberry beetle. In spraying tests made in 1Q2S for the control 
•f B. tomnntosus lead arsenate paste at k pounds per 100 imperial gallons 
•f water reduced the infestation from 37«3 to I5.O percent; and a prop- 
rietary derris root preparation at 2 pounds to Uo imperial gallonis of 
water reduced the infestation from 36.5 to 1^.2 percent. In 1Q29 a 
pyrethrum extract and the derris preparation (2 pounds to Uo imperial 
gallons of Water) did not materially reduce the :^.nf eatation, whereas 
lead arsenate at 5 pounds plus 2 pounds of gelatin to 100 imperial 
gallons of vrater gave almost complete control. None of the sprays had 
any appreciable effect on the adult beetles, which were in the flowers 
at thr time of spraying. In 1930 the derris preparation reduced the in- 
festation to 3»7 percent. The failure of dorris to control in the tests 
in 1929 may have been due to variation in the composition tf different 
samples or to the use of old stock. Arsenical residue on sprayed berries 
bars the use of lead arsenate. 
In 1932 this station (lOj) called attention to Ste^-^r'e (357)paper 
on the control of the raspberry and loganberry beetle by means of derris. 
The proportion of mark(-table loganberries in a badly infested plantation 
was increased from 23.8 to 77*7 percent by two spraying-^ with derris and 
soap. The average number of loganberri'"? p' r pound of ripe fruit over 
the whole of the picking s'^asoi: vork>-"d out at 176 on unsprayed and 127 
on sprayed plots. 
- Kearns and Swarbrick (2ho) of th--^ Agricultural and Horticultural 
Research Station of the TJnivfjrslty of Bristol, at Long Ashton, England, 
in 1932 reported that derris-soap spray (rotf^none O.OOU percent) was 
supnrior to derris extract in rape oil emulsified in water (rape oil 1 
percent, rotenone content undetermined) for the control of larvae of the 
loganberry beetle. 
