1. Missed the live Ask the Expert event?
    Catch up on the conversation about fertilization strategies for success with the experts at Koch Turf & Ornamental in the Fertilizer Application forum .

    Dismiss Notice


Discussion in 'Pesticide & Herbicide Application' started by JeffC, Feb 4, 2001.

  1. JeffC

    JeffC LawnSite Member
    Messages: 15

    What does LD50 stand for
  2. jrblawncare

    jrblawncare LawnSite Senior Member
    Messages: 445

    Jeff,Pesticide toxicity is rated by determining the amount,or lethal dose,that will kill 50% of the test population of animals this is referred to as the LD50.Hope this helps.John...{page 4 in the KY training manual for ornamental and turf pest control}
  3. UrbanEarth

    UrbanEarth LawnSite Member
    Messages: 142

    Actually, LD50 is used to rate ANY substance's ability to be lethal. It is usually in grams per kilogram of body weight of subject, therefore if something has an LD50 of 15mg, consuming 15 mg per kg of body weight will kill 50% of the test population.
    I can't remember or find the number but sugar has an LD50 rating as well (it's insanely high, force feeding would be required).

    Hope this helps.

  4. Garry

    Garry LawnSite Member
    Messages: 184

    It is expressed in milligrams of toxin to Kilograms of body weight. Pesticides labled Danger will have a lower LD-50 than those labled Caution. It's involved in all pesticide training, so a good understanding will only benefit you.

    G. William Lamar

Share This Page