NAPHTHALENE FLAKES. Formerly used to treat gladiolus corms against thrips
but now replaced by DDT. Some gardeners try them around bulbs
to discourage moles and mice but too much will prevent growth.
New Pomo-Green (DDT, lindane, sulfur 62%, Niagara Chemical Div.,
Food Machinery & Chemical Corp., Middleport, N.Y.). The old
"Massey" dust with DDT and lindane substituted for lead arsenate.
This dust does have enough sulfur to control mildew as well as black
NICOTINE SULFATE. An old and still valuable contact insecticide. See Black
No-Nib'l. A rabbit repellent about the same chemically as Good-rite
z.i.p. for deer.
Orthocide 406 (captan, California Spray-Chemical Corp., Richmond,
Orthorix Spray (calcium polysulfides, California Spray-Chemical Corp.).
A sulfur spray used somewhat more on die West Coast for rose
mildew and some other diseases.
Ovotran (p-chlorophenyl p-chlorobenzene sulfonate, Dow Chemical Co.,
Midland, Mich.). Anodier excellent miticide relatively non-toxic
to man; it kills mite eggs, useful for spruce mite on evergreens and in
cluded in some combination rose sprays and dusts.
OXYQUINOLINE BENZOATE. Used in chemotherapy for prevention of Dutch
elm disease and damping-off of seedlings.
OXYQUINOLINE SULFATE. Another chemotherapeutant promising in control
of bacterial wilt and some root and stem rots.
PARADICHLOROBENZENE. A soil fumigant for peachtree borer, applied in
ring around tree in fall. Dosage must be exact: 54 ounce for 3-year
trees, 3/4 ounce to 6 years, 1 to 11/2 ounces for older trees. The ring is
covered with a soil mound.
PARATHION (o-diethyl o-p-nitrophenyl thiosphosphate). An organic phos
phate available under many trade names-Thiophos, Vapophos,
etc.-as a wettable powder for spraying and in aerosol form, very useful
in control of mites, mealybugs, many scale insects (but not soft scale),
chrysanthemum leaf nematode, meadow nematodes, and also some chew
ing insects but extremely toxic to man. It should not be used without gas
mask, natural-rubber gloves, completely protective clothing and so is not
adapted for home garden use. Try Malathon instead.
PARIS GREEN. Used as a bait for sowbugs, 1 part to 9 parts sugar, and in
some cutworm baits available commercially.
Parzate (Zineb, E. I. du Pont de Nemours & Co., Wilmington, Del.).
Same uses as Dithane Z-78, also recommended for snapdragon rust.
Pestox 3 (octamethyl pyrophosphoramide, Heyden Chemical Co., New
York, N.Y.). A systemic insecticide, poisonous to man, mites, and
sucking insects but not to most chewing insects. Applied to the soil
and taken up by the plant it kills the insects when they come to suck. It
is not yet recommended for vegetables because of danger of residual
poison, nor for general garden use.