46 BULLETIN 1201, IT. S. DEPARTMENT OF AGRICULTURE. 



Pieris ovalifolia (Wall.) D. Don. Ekicaceae. Synonym: Andromeda ovali- 

 folia Wall. 



Greshoff (31, p. 96), quoting Watt, says that this is a useful in- 

 secticide. 



Pilocarpus jaborandi Holmes. Rutaceae. Jaborandi. Northern Brazil. 



Cook and Hutchison (18, p. 4) found that the powdered leaves had 

 a slight effect on fly larvse. 



Pimenta officinalis Lindl. Myetaceae. Synonyms: P. pimenta Karst, P. vul- 

 garis Lindl. Allspice. West Indies and tropical America, cultivated every- 

 where in tropical countries. 



Scott, Abbott, and Dudley (83, p. 5, 13, 26, 34) found powdered 

 allspice ineffective against bedbugs, roaches, clothes moths, and car- 

 pet beetles, and Abbott (1, p. 11) found it of no value against the 

 dog flea. 



Pimpinella anisum L. Apiaceae. Anise. Southern Europe to the Levant; 

 also cultivated. 



Scott, Abbott, and Dudley (83, p. 13) found powdered anise seed 

 ineffective against roaches. 



Piper nigrum L. Pipeeaceae. Black pepper. India, cultivated in many 

 tropical countries. 



Graham-Smith (30, p. 250) , quoting Howard, of Australia, says : 

 " Flies may be effectively destroyed by putting half a spoonful of 

 black pepper in powder on a teaspoonful of brown sugar and one 

 teaspoonful of cream. Mix all together and place in a room where 

 flies are troublesome, and it is said they will soon disappear." 



Quaintance and Brues (69. p. 133), quoting tests made by Bishopp 

 and Jones, say that black pepper had no effect on the oviposition 

 of the bollworm when this substance was placed on the silk and ears 

 of corn. 



Eiley (71, p. 187) states that a strong extract killed cotton caterpil- 

 lars tested by contact within 12 hours. 



Podophyllum peltatum L. Bebbeeidaceae. Common mayapple. Eastern 

 United States. 



Riley (71, p. 187) says that the powder from the dried roots did 

 not affect cotton caterpillars when dusted upon them. 



Pogogyne parviflora Benth. Menthaceae. California. 



Chesnut (15, p. 384) says: "Many of the Indians place the culled 

 plants in or about their houses to drive away fleas."' 



Polygonum hydropiper L. Polygonaceae. Synonym : Persicaria hydropiper 

 Opiz. Water-pepper. Europe, United States. 



Porcher (68, p. 409) quoting from Floria Scotica, states that it is 

 found a convenient and useful application for driving off flies from 

 wounds occurring on cattle. 



Eiley (71, p. 185) says that a decoction of the leaves and an alco- 

 holic extract had no effect on cotton caterpillars. 



