-176- 
Peach leaves, wet with the juice of mulberry leeves, were fed to 
silkworms, end within 24 hours practicially ell the insects were dead. — 
L'clndoo end Sievers ( 259 , p. 21). 
Oil of peach kernel was a good repellent for 2 days only, but it 
did prevent infestation by screwworms. — Parmen end coworkers ( 302 ) . 
HAGENIA ABYSSIMCA J. F. Gmel. Kousso. 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277). 
KERPIA JAPONIC A (L.) DC. 
Kerria powder (20 percent in flour) had no effect on the cater- 
pillers of Procenia litu ra (F.). — DeEussy (76). 
P0T2NTILLA ARG-^TEA L. Silver cinquefoil. 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277; . 
PRONUS SEROTINA Ehrh. Wild black cherry. 
Extracts of the leaves killed only 10 percent of the nosquito lfr- 
vee tested. —Hartzell end Wilcoxon ( 188) • 
PRTITJUS sp. Cultivated cherry. 
Various extracts were of no vclue as ettrectents to the cherry 
fruitfly in Germany.— Thi em ( 599 ) . 
PYRUS CO}«MUNIS L. Kiefer pear. 
PYRUS sp. Common pear. 
Extracts from these trees were not repellent to the Japanese beetle. - 
Metzger end Grant ( 277 ). 
QUILLAJA BRASILIENSIS Mart. 
This plant wes used as en insecticide.— Enrcellos Fagundes (51) . 
QUILLAJA S^PONARIA I. r olina. Soap bark. Pename wood. 
Only a few of the references on this plent ere given here. 
An emulsion meriting attention contained 3 pounds of benzine, 3 
pounds of ammonia, end a decoction made by boiling 1 pound of Penama 
wood in 10 gallons of weter. It killed 50 to 80 percent of the cater- 
