Details

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🧾 Definition / Product Overview

Fastac® 11 is a non-systemic insecticide formulated as an Emulsifiable Concentrate (EC). 

• Active ingredient: Alpha-cypermethrin at 11% w/w 

• It belongs to the pyrethroid class of insecticides, which generally act on the insect nervous system. 

• Mode of action: primarily by contact and ingestion (stomach poison). 

• It is broad-spectrum, meaning it’s effective against a variety of insect pests. 
  
   

  ✅ Uses / Target Pests

• Fastac 11 contains alpha-cypermethrin 11% w/w, a pyrethroid insecticide. 

• It is a non-systemic insecticide, meaning it acts by contact and ingestion (stomach poisoning) — insects are killed when they touch or consume the treated surfaces. 

• It is effective against a variety of pest insects, especially on crops like rice and other field crops. 

• Examples of pests controlled include:
   • Green leafhoppers (Nephotettix virescens) 
   • Rice leaf folder (Cnaphalocrocis medinalis) 
   • Stem borer (Chilo suppressalis) 
   • Armyworm / leaf-feeding caterpillars (Spodoptera litura) 
   • Other chewing insects such as leaf-miners, borers, etc. 

• On the BASF Malaysia site, Fastac 11 is promoted as a broad-spectrum insecticide with fast knock-down effect and “no phyto, safe to crop” (i.e. minimal phytotoxicity) when used properly. 

• The product is used by mixing with water and spraying over the crop to cover foliage. 

• There are guidelines for crop types with specific rates. For example, for cocoa pests, the label suggests 5 ml per 10 L of water; for durian mealybug, 4 ml per 10 L etc. 

• The re-entry interval (REI) — after spraying, one should avoid entering the treated area for 24 hours. 

• For some crops, there is a harvest waiting period: e.g. for cocoa, “do not harvest crop at least 7 days after last spray.” 

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  ⚠️ Safety & Environmental Notes

  From the Safety Data Sheet and other sources:

• Fastac 11 is flammable (liquid & vapour). 

• It causes skin irritation, serious eye damage, and may cause respiratory irritation if inhaled. 

• It is toxic if swallowed and harmful if inhaled. 

• Prolonged or repeated exposure can cause damage to peripheral nervous system. 

• It is very toxic to aquatic life, with long-lasting effects. 

• Users should use personal protective equipment (PPE) — gloves, eye protection, protective clothing — and take care not to contaminate waterways. 

• ⚙️ Application / Practical Use Notes

  From the information available:

• The product is used by mixing with water and spraying over the crop to cover foliage. 

• There are guidelines for crop types with specific rates. For example, for cocoa pests, the label suggests 5 ml per 10 L of water; for durian mealybug, 4 ml per 10 L etc. 

• The re-entry interval (REI) — after spraying, one should avoid entering the treated area for 24 hours. 

• For some crops, there is a harvest waiting period: e.g. for cocoa, “do not harvest crop at least 7 days after last spray.” 

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  ⚠️ Safety & Environmental Notes

  From the Safety Data Sheet and other sources:

• Fastac 11 is flammable (liquid & vapour). 

• It causes skin irritation, serious eye damage, and may cause respiratory irritation if inhaled. 

• It is toxic if swallowed and harmful if inhaled. 

• Prolonged or repeated exposure can cause damage to peripheral nervous system. 

• It is very toxic to aquatic life, with long-lasting effects. 

• Users should use personal protective equipment (PPE) — gloves, eye protection, protective clothing — and take care not to contaminate waterways.