Description
🚚 The fastest delivery time : 2-day delivery.
🐝 Supplier / Origin : Product of USA
🔖 Certification : Hong Kong Organic Resource Centre Certification Limited "Acceptable Materials Register"
🌱 Manufacturer introduction : NA
🛍 Product Information :
BT Powder - is a microbial insecticide, which is a further improved Bacillus thuringiensis (also known as Suli bacteria), which is particularly effective against Lepidoptera pests/caterpillars, especially the larval stage. The toxic protein crystals of Bacillus thuringiensis are sprayed and distributed on the plants. Within one hour after the pests eat, their mouthparts will be paralyzed due to poisoning, and the bacterial toxins will damage the intestines, and then stop eating, leading to death within two days. Regular application can inhibit the reproduction of pests. Suitable for planting vegetables, flowers, trees and lawns. BT Powder and Sanyi Neem Oil can be mixed for improved functions. Both are produced by CERTIS in the United States and OMRI organic certified.
Dilution ratio - 1:1000, apply once every 7 days.
(After applying this product, you can return to the application area 4 hours later. This drug can be used until before harvest.)
OMRI Certified and Hong Kong Organic Resource Centre (HKORC) Available Materials
Bacterial Powder is an organic insecticide specially formulated against Lepidoptera, especially its larvae
Suitable for fruit trees, vegetables, forests, flowers, etc.
Control: hanging filarial, cabbage worm, caterpillar, corn borer
Specifications: Bacillus Thuringiensis 50% GR (2P12)
Origin: United States
What is Bacillus thuringiensis (Bt)?
Bt is a bacterium that occurs naturally in soils around the world. To reproduce, the spores produced by Bt grow into new bacteria. Bt spores contain proteins that are toxic to insect larvae. Since Bt comes from natural sources, it is called a biopesticide. In general, biopesticides tend to be less risky than typical man-made pesticides.
There are many types of Bt. Each type or strain affects a different group of insects. Target insects include Beetles, Flies (including mosquitoes), and Butterflies. It is used to kill the larvae of beetles and mosquitoes, black flies and moths. Bt is also toxic to nematodes.
Bt has been registered by the US Environmental Protection Agency (US EPA) as a pesticide since 1961. The U.S. EPA requires routine testing to ensure the absence of unwanted toxins and bacteria. Some of these unwanted toxins can be harmful to non-target animals and people.
Bacillus thuringiensis (Bt) is a naturally occurring soil bacterium used as a biological pesticide. While the base species acts as a general stomach poison for caterpillars, B. thuringiensis subsp. aizawai (Bta) is a specific strain prized for its broader toxin profile, making it highly effective against armyworms and resistant pests.
A breakdown of how the standard species (usually B. kurstaki, or Btk) and the aizawai variant compare reveals:
Key Differences of BT & BTa at a Glance
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Protein Toxins: Standard Bt (like Btk) primarily utilizes Cry1A and Cry2A toxins. The aizawai strain adds Cry1C and Cry1D to its arsenal, expanding the range of susceptible insects.
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Target Pests: Standard Bt is excellent for loopers, cabbageworms, and general caterpillars. Aizawai targets these same insects but is particularly superior for tough species like armyworms, beet armyworms, and diamondback moths.
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Pest Resistance Management: Insects can develop resistance to standard Bt proteins (like Cry1A) over time. Because aizawai relies on a wider array of toxins, it is often rotated in to manage and overcome resistance.
Mode of Action & Application
- How it Works: Both types are gut toxins. The caterpillar must ingest the foliar residue. Once eaten, the crystal proteins dissolve in the alkaline gut of the insect, paralyzing its digestive tract and causing it to stop feeding.
- Application: Both require thorough, uniform coverage (especially on the undersides of leaves). Both are most effective when applied to young, newly hatched larvae.
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Safety: Both are completely non-toxic to humans, pets, and beneficial insects like bees.
- Standard Bt (Kurstaki): Commonly sold as Dipel or Thuricide. Best for general garden caterpillars.
- Bt aizawai: Commonly sold as XenTari or Agree. Best for heavy armyworm infestations or situations where caterpillars have become resistant to standard Bt.
Reference for product information about BT bacteria:
Agriculture, Fisheries and Conservation Department's guidelines for the use of Bacillus thuringiensis:
Hong Kong Organic Resource Centre Certification Limited
"List of Approved Materials List"
**Special note: Organic pesticides are mainly used for stomach poison and repellent functions, with contact killing as a supplement, so it is best to start applying them from the prevention stage to give plants better resistance. If insect and fungal pests occur, it is necessary to apply the pesticide immediately. It is ideal to use it before the eggs hatch and in the larval stage.
When diluting pesticides, first add 1 part of the pesticide to 1 part of water and stir thoroughly, then add the final amount of water. When spraying, you also need to stir or shake the sprayer from time to time to allow the drug and water to be fully mixed.
It is best to apply the pesticide in the morning and evening, and avoid applying it at noon when the sun is strong and the temperature is high.
Do not dilute too much unnecessary amount of the drug, and the diluted drug cannot be preserved.
Please wear appropriate protective clothing and a mask when spraying pesticides.
