Acknowledgements: The aid
maintaining the plot areas
to the value of this work.
in the following table.


American Cyanamid
 Zinophos


Chemagro Corp.
 Bayer 25141


Bayer 29492


of Dr. E. O. Burt in initiating these studies, and in
is gratefully acknowledged. His suggestions added much
The nematocides were provided by the suppliers listed


Co.
0,O-diethyl 0-2-pyrazinyl phosphorothioate
10% granular, 4 lbs. per gal. "Cynem".


o,o-diethyl o-p-(Methyl sulfinyl) phenyl phosphorothioate.
10% granular, 2,4,6 lbs. per gallon.


Dow Chemical Co.
 Nellite phenyl NN'-dimethyl phosphorodiamidate.

 DBCP Dibromochloropropane "Fumazon" 17.5 Ibs./gal.

Geigy Chemical Co.
 G-33946 benzyl-N-methyl-dithiocarbamate. 25% e.c.


GS-10469

GS-10979

GS-12286


Diazinon AG500
Diazinon A-1619


0-0-diethyl 0- (2-isopropyl-b-methyl-4-pyrimidinyl)
phosphorothioate.


Niagara Chemical Div. FMC Corp.
 Nia 9227 an organo-phosphorus compound.


Ethion


2 Ibs. per gal. e.c.


OO,0,',0' -tetraethyl S,S'methylene bisphosphorodithioate.


Pennsalt Agricultural
 Penphene Tetrachloro thiophene. 2 lbs. per gal.

Shell Chemical Co.
 DBCP Dibromochloropropane "Nemagon" 17.5 lbs. per gal.

 SD7727 not released. 2 Ibs. per gallon.


Union Carbide Co.
 U.C-17956


Virginia Carolina Chem. Co.
 VC-13 0-2-4 Dichlorophenyl O,0-diethyl phosphorothioate.