Acaricides


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Related to Acaricides: miticide

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.

REFERENCES

Berim, N. G. Khimicheskaia zashchita rastenii. Leningrad, 1966.
Mel’nikov, N. N. Khimiia pestitsidov. Moscow, 1968.

N. N. MEL’NIKOV

Table 1
NameFormulaMelting temperature(°c)Dos (kglha)
1 Boiling point at absolute pressure of 8 newtons per square meter (0.06 mm of mercury)
Kelthane ...............................Table 178.5–790.2–0.6
Milbex .................................Table 1123.5–124: 69.5–700.5–1.0
Tedion (tetradichlon) ....................Table 1146.5–147.50.7–1.5
Chlorbenside (chlorparacide) .............Table 1720.2–0.6
Chlorobenzilate .........................Table 1141–1420.2–0.8
Chlorophenylchlorobenzenesulfonate (Ovotran) ............................Table 186.50.5–1.0
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Acaricidal property of plant extracts can provide a potential substitute to synthetic acaricides currently used for tick control as has been reported through testing of some plant extracts against R.
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Cattle, when treated with acaricides are less susceptible to tick-borne diseases and there is an increase in the milk and other product yield.
Since the mite has a very short and prolific life cycle, its resistance to acaricides has more readily emerged than the rate of the resistance in other pests, In addition, the mites resistance to certain acaricides has been shown to have cross resistance to other acaricides.
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The types of pesticides include insecticides, fungicides, rodenticide, herbicides, acaricides and bactericides.