Chemical Class and Ovicidal Mode of Action
Hexythiazox belongs to the thiazolidinone chemical class (IRAC Group 10A), functioning as a mite growth inhibitor.
While possessing low direct toxicity to adult mites, it exhibits lethal toxicity against mite eggs and early nymphal stages, while rendering treated adult female mites sterile.
- Active Molecule: Hexythiazox 5.45% EC (Emulsifiable Concentrate)
- Potent Ovicidal Action: Kills mite eggs on contact, preventing embryo development and hatching
- Transovarial Sterilization: Exposed adult females lay non-viable, sterile eggs that fail to hatch
- Translaminar Movement: Penetrates leaf tissues, destroying mite eggs laid on the undersides of leaves
Target Crops and Mite Infestations
Phytophagous mites puncture plant cells and drain sap, causing bronzing, leaf curling, and premature defoliation during hot, dry spells.
Hexythiazox 5.45% EC provides long-lasting residual defense across commercial plantation and horticultural crops.
- Tea: Red spider mite (Oligonychus coffeae), pink mite, and purple mite infestations
- Chilli: Yellow mite (Polyphagotarsonemus latus) causing downward leaf curling and stunted shoot flushes
- Apple Orchards: European red mite (Panonychus ulmi) and two-spotted spider mite
- Brinjal & Okra: Two-spotted spider mite (Tetranychus urticae) colonizing lower leaf surfaces under protective webbing
Application Strategy and Resistance Management
Apply Hexythiazox at the first appearance of mite eggs or nymphs before full-scale adult population explosions develop.
Because of its high safety profile toward predatory mites and beneficial insects, it serves as a cornerstone of Integrated Pest Management (IPM).
- Application Timing: Early preventive intervention is critical; if adult populations are already heavy, combine with an adulticide
- Water Volume: Apply with 200 liters of water per acre (or 400 liters in tea bushes) ensuring complete canopy coverage
- Resistance Rotation: Alternate with different acaricidal modes of action like diafenthiuron, fenazaquin, or wettable sulfur
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is hexythiazox 5.45% EC used for?
It is an acaricide used to control destructive mite species like red spider mites, yellow mites, and two-spotted spider mites in tea, chilli, and fruits.
Does hexythiazox kill adult mites instantly?
No, it specifically kills mite eggs and nymphs, but causes adult females to lay sterile eggs, leading to complete population collapse within several days.
Is hexythiazox safe for beneficial predatory mites?
Yes, hexythiazox has low toxicity to non-target predatory mites and beneficial insects, making it suitable for IPM programs.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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