المبيدات الفوسفورية العضوية | Organophosphorus Pesticides

Phosphorus-Based Pesticides

Phosphorus-based pesticides are considered essential tools in agricultural pest control. But why are they called by this name? The reason lies in their composition, which includes the phosphorus atom (P) and is formed from esters resulting from the reaction of phosphoric acid with alcohol.

Examples of Organic Phosphorus Pesticides:

1. Malathion:

   • Type: Phosphoric contact pesticide.
   • Uses: Effective against various pests such as ants, scale insects, and whiteflies.

2. Diazinon:

   • Type: Systemic, moderately toxic.
   • Uses: Targets pests like whiteflies and leaf-eating worms.

3. Parathion:

   • Type: Phosphoric contact pesticide.
   • Uses: Effective against pests like termites and whiteflies.

4. Profenofos:

   • Type: Phosphoric contact and systemic.
   • Uses: Targets pests like cotton leafworms and red palm weevils.

5. Fenitrothion:

   • Type: Phosphoric contact pesticide.
   • Uses: Effective against cotton leafworms, palm weevils, and other insects.

6. Chlorpyrifos:

   • Type: Phosphoric.
   • Uses: Effective against cotton leafworms, armyworms, and red palm weevils.

7. Diazinon:

   • Type: Contact and systemic.
   • Uses: Targets pests like termites, cockroaches, and bedbugs.

Mixing Pesticides:

Phosphorus-based pesticides can be mixed with other substances to enhance their effectiveness, such as insect growth regulators, pyrethroid pesticides.

Cautions when Mixing Phosphorus-Based Pesticides:

It is not recommended to mix phosphorus-based pesticides with copper compounds or micronized sulfur. This is due to the alkaline nature of copper and sulfur compounds, which can elevate the pH of the spray solution, potentially reducing the insecticidal efficacy of the pesticides.