Acaricides

chemical agents used to combat mites. Most effective against the herbivorous mites are the organophos-phorus insecticides (metaphos, methylnitrophos, trichlor-metaphos, and others) and, in particular, the so-called systemic insecticides (phosphamidon, methylmercaptophos, octamethyl pyrophosphoramide, and others), which make it possible to protect the plants for a protracted period. Also effective as acaricides are aromatic alcohols, esters of acids, sulfides, sulfones, azobenzene, nitrophenols, and certain organic compounds of fluorine, as well as sulfur preparations (in a ground form, as colloidal preparations, or in the form of calcium or barium polysulfides obtained by dissolving sulfur in lime; such a solution is known as lime-sulfur spray). Organophosphorus and organochlorine insecticides, carbamates, and others are used for combating ixodoid ticks.

Some acaricides are given in Table 1.

Table 1
Name	Formula	Melting temperature(°c)	Dos (kglha)
1 Boiling point at absolute pressure of 8 newtons per square meter (0.06 mm of mercury)
Kelthane ...............................		78.5–79	0.2–0.6
Milbex .................................		123.5–124: 69.5–70	0.5–1.0
Tedion (tetradichlon) ....................		146.5–147.5	0.7–1.5
Chlorbenside (chlorparacide) .............		72	0.2–0.6
Chlorobenzilate .........................		141–142	0.2–0.8
Chlorophenylchlorobenzenesulfonate (Ovotran) ............................		86.5	0.5–1.0