LEAD ARSENATE. A stomach poison still used for many chewing insects in
spite of the advent of DDT, for it does not build up mite popu
lations. It is used for bagworms, cankerworms, and other caterpillars
and many beetles on flowers, shrubs, and shade trees. The usual dosage
is 2 or 3 tablespoons to 1 gallon of water; for trees, 3 to 6 pounds per
LIME-SULFUR. Fungicide and contact insecticide, mostly used as a dor
mant spray, 1 part liquid to 9 parts water, for San Jose, rose, juni
per, pine needle, and other scales, and 1 to 15 dilution for peach leaf
curl. At summer strength, 1 to 50, it controls Volutella blight of box
LINDANE (gamma isomer of benzene hexachloride, at least 99% purity).
The purified form of crude BHC with less disagreeable odor and
imparting less objectionable flavor to food crops. A stomach and contact
poison good for some aphids, woolly and spruce gall particularly, leaf
miners, lace bugs, spittle bugs, some Diabrotica and other beetles, pickle
worms, wireworms, maggots, and weevils in soil (although a slight off
flavor is given to turnips, radishes, etc.).
Malathon (O,O-dimethyl dithiophosphate of diethyl mercaptosuccinate,
American Cyanamid Co., 30 Rockefeller Plaza, New York 20,
N.Y.). Another phosphate spray but less toxic to man, released
for home garden use in 1953. Experimental tests indicate it is effective for
mites, mealybugs, some scales in crawling stage, some aphids.
Manzate (manganese ethylene bisdithio carbamate, E. I. du Pont de
Nemours Co., Wilmington, Del.). New fungicide good for early
and late blight of potato and tomato and other vegetable diseases, probably
brown rot of stone fruits, rose black spot, and possibly mildew.
Marlate (methoxychlor, du Pont).
METALDEHYDE. Used in many slug baits with calcium arsenate, sold as
Slug-O, Slug-em, Bug-Geta, etc., or, with chlordane, as Snailicide.
METHOXYCHLOR (dimethoxy-diphenyl dichloroethane). An analog of DDT
less toxic to man and animals and some plants and somewhat
less effective for most insects but more effective for Mexican bean beetles,
fall armyworm, good for plum curculio, blueberry maggots, cranberry
and cherry fruitworms, asparagus and cucumber beetles.
METHYL BROMIDE. A soil fumigant that can be used under some conditions
to kill nematodes and some fungi near living plants. Balled and
potted nursery stock can be treated in special fumigating chambers
MISCIBLE OIL. A vegetable or mineral oil readily emulsifiable with water
to form a milky white liquid. Usually used for dormant spraying,
sold under many trade names: Scalecide, Scale-O, etc. May be unsafe
for beech, black walnut, Japanese and sugar maples. Do not use before
or after sulfur.
NABAM (disodium ethylene bisdithiocarbamate). See Dithane D-14.