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An agrochemical or agrichemical, a contraction of agricultural chemical, is a chemical product used in agriculture. In most cases, agrichemical refers to pesticides including insecticides, herbicides, fungicides and nematicides. It may also include synthetic fertilizers, hormones and other chemical growth agents, and concerntrated stores of raw animal manure.

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Diflubenzuron is an insecticide of the benzoylurea class. It is used in forest management and on field crops to selectively control insect pests, particularly forest tent caterpillar moths, boll weevils, gypsy moths, and other types of moths. It is a widely used larvicide in India for control of mosquito larvae by public health authorities. Diflubenzuron is approved by the WHO Pesticide Evaluation Scheme.

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Diprogulic acid is a precursor used in commercial ascorbic acid production. In agriculture, its sodium salt, dikegulac sodium, is used as a plant growth regulator, primarily used as a branching agent. When it is taken up by a plant, dikegulac sodium is translocated to its apical meristems, where it inhibits DNA synthesis. This suppresses apical dominance in the plant and can stimulate lateral branching, resulting in a bushier growth habit. Dikegulac sodium is sometimes used to inhibit fruiting and flowering.

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Octasulfur is an inorganic chemical with the chemical formula S8. It is a yellow solid, and is odourless and tasteless. It is the most common allotrope of sulfur. It is a major industrial chemical that occurs widely in nature.

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Potash includes various mined and manufactured salts that contain potassium in water-soluble form. The name derives from pot ash, which refers to plant ashes or wood ash soaked in water in a pot, which was the primary means of manufacturing the product before the Industrial Era. The word "potassium" is derived from "potash".

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Sulfur (in British English: sulphur) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature.

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Uniconazole is a triazole chemical used as a plant growth retardant. It is active on a wide range of plants and acts by inhibiting the production of gibberellins.