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An insect growth regulator (IGR) is a chemical insecticide that kills insects indirectly by disrupting their life cycles. [1] The term was initially proposed to describe the effects of juvenile hormone analogs. [2] Although the term "insect growth disruptor" more accurately describes the actions of IGRs, it did not become widely used. [1]
Pyriproxyfen is a juvenile hormone analog (IRAC group 7C) and an insect growth regulator. [7] It prevents larvae from developing into adulthood and thus rendering them unable to reproduce. [8] In the US, pyriproxyfen is often marketed under the trade name Nylar, [9] and is one of two active ingredients in Advantage II.
They do not directly kill the insect, but disrupt moulting and egg hatch, and thus act as insect growth regulators. They act by inhibiting chitin synthase, [2] preventing the formation of chitin in the insect's body. The insecticidal activity of the BPUs was discovered serendipitiously at Phillips-Duphar who commericalised diflubenzuron in 1975 ...
Insect growth regulators [ edit ] Insect growth regulator (IGR) is a term coined to include insect hormone mimics and an earlier class of chemicals, the benzoylphenyl ureas, which inhibit chitin (exoskeleton) biosynthesis in insects [ 42 ] Diflubenzuron is a member of the latter class, used primarily to control caterpillars that are pests.
Buprofezin is an insecticide used for control of insect pests such as mealybugs, leafhoppers and whitefly on vegetable crops. It is a growth regulator, acting as an inhibitor of chitin synthase (IRAC group 16). [2]
Etofenprox is a broad-spectrum insecticide which disturbs insect nervous systems following direct contact or ingestion, and which is active against a broad spectrum of pests. It is used in agriculture, horticulture, viticulture, forestry, animal health and public health against many insect pests, for instance Lepidoptera , Hemiptera ...
Bifenthrin is used by the textile industry to protect woollen products from insect attack. It was introduced as an alternative to permethrin-based agents, due to greater efficacy against keratinophagous insects, better wash-fastness, and lower aquatic toxicity.
Pyrethrum rapidly knocks down flying insects but has negligible persistence — which is good for the environment but gives poor efficacy when applied in the field. Pyrethroids are essentially chemically stabilized forms of natural pyrethrum and belong to IRAC MoA group 3 (they interfere with sodium transport in insect nerve cells). [29]