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FAGOPYRUM SAGITTATUM Gilib. Buckwheat. 
Extracts were not repellent to the Japanese beetle.— Mettger and 
Grant (277). 
POLYGONUM FLACCIDUM 
This plant, which contains saponin, was used in Assam as a verrii- 
cide and fish poison. It exudes a greenish mucilaginous juice, which 
had only a slight effect on mosquito larvae.— Mans on ( 265 ) . 
POLYGONUM HYDROPIPER L. Synonym: Persiceria hydropiper Opiz. 
Water pepper. 
This plant was used for driving flies from' wounds on cattle.— 
Porcher ( 308 , p. 409). 
A decoction of the leaves and an alcoholic extract had no effect 
on cotton caterpillars.— Riley ( 525 , p. 185). 
POLYGONUM PENS YLVANI CUM L. Smartweed. 
A decootion had no effect on the horn fly.— Washburn ( 419 , p. 35) • 
POLYGONUM ORIENT ALE L. Synonym: P. hispidum . 
POLYGONUM PUNCTATUM Ell. Synonym: P. aore H. B. K. 
These species in Guatamala were used to cure skin diseases of dogs 
and as an insecticide.— Pacheoo Herrarte (297 ). 
P. punotatum was used as an insecticide.— Barcellos Fagundes (51). 
POLYGONUM sp. Persicary. 
A decoction of this plant repelled grain weevils in France.— Lesne 
(245). 
This plant has been found of insecticidal value against certain 
insects in South China. --Chiu (94) • 
RHEUM RHAPONTICUM L. Rhubarb. 
Radix rhei had no effect on the caterpillars of Prodenia litura 
(F.). — DeBussy (76) . 
Water extracts of the roots killed 70 percent of the mosquito lar- 
vae tested.— Hartzell and Wilcoxon (lRR). 
