Phygon, Seed Protectant, and Phygon XL (2,3-dichloro-i,4 naphthoqui
none, U.S. Rubber Co., Naugatuck Chemical Div., Naugatuck,
Conn.). Used in place of Spergon as a seed protectant, and as a spray for
brown rot, azalea flower blight, rose black spot, and some other diseases.
It is an efficient fungicide but is somewhat injurious to plants, the in
jury varying with location and conditions. It is not toxic to man in the
usual sense but may cause skin irritation.
Pratt's Fruit Tree Spray or Dust (sulfur, DDT, and basic lead arsenate,
B. G. Pratt Company, Hackensack, N.J.). DX Insect Spray can be
added to the Fruit Tree Spray to control aphids, mites, and redbugs on
Puratized Agricultural Spray (phenyl mercuri triethanol ammonium
lactate, Gallowhur Chemical Corp., 801 Second Ave., New York
17, N.Y.). A mercury compound used in early apple sprays to eradicate
fungi, even after infection has taken place, and for sycamore anthrac
nose. In many cases toxicity to plants prevents its having the wide use
its efficacy would warrant.
PYRETHRUM. One of our earliest insecticides, a contact poison prepared
from dried flowers of several species of chrysanthemum and sold
under various trade names, often combined with rotenone and with
piperonyl cyclonene as a synergist. Pyrethrum causes a quick paralysis
of insects but has little residual effect. It is non-poisonous to man.
Red Arrow Garden Spray (pyrethrins, rotenone, piperonyl cyclonene,
McCormick & Co., Baltimore, Md.). A well-known and safe spray
for many sucking and some chewing insects.
ROTENONE. A contact insecticide and stomach poison, the active ingredi
ent in derris, cube, and other tropical plants, relatively non-poison
ous to man but toxic to fish as well as insects. Available as a spray or
dust under many brand names.
RYANIA. A South American plant used to make an insecticide generally
recommended for control of European corn borer.
SABADILLA. Obtained from seeds of another South American plant (Scho
enocaulon) of the lily family. Used as a dust for plant bugs, squash
bugs, sometimes chinch bugs. It is non-poisonous but has a disagreeable
Scalecide (dormant oil spray, B. G. Pratt Company, Hackensack, N.J.).
Scale-0 (dormant oil spray, Andrew Wilson, Inc., Springfield, N.J.).
Setnesan (hydroximercurichlorophenol, E. I. du Pont de Nemours & Co.,
Wilmington, Del.). One of our oldest seed disinfectants, an or
ganic mercury still used for flower seeds and some vegetable seeds.
Snailidde (metaldehyde and chlordane, Kelly Agricultural Products Co.,
McKeesport, Pa.). A slug and snail dust also good for ants and