Dictionary of Pesticides

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 home fruits.

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 odor.

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 sowbugs.

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