How to Manage Pests
Active ingredient: Calcium polysulfide
Pesticide type: fungicide
Synonym: lime sulfur
See example products below.
Potential Hazard1 to
||People and Other Mammals
Toxicity to People and Other Mammals4
- Toxicity rating: Slightly Toxic
- Notes: This product is corrosive to flesh because of its caustic alkaline nature and it causes irreversible eye damage and skin burns. For this reason most products include the signal word 'Danger' on the label.
Toxicity to People and Other Mammals5
- On US EPA list: Not listed;
- On CA Proposition 65 list: Not listed
- Overall runoff risk rating: No information
Impact on Natural
- Overall toxicity rating: Low To High
- Specific impacts:
predatory mites (Low To High),
general predators (Low)
Impact on Honey Bees3
- Toxicity category: IV - Apply at any time with reasonable safety to bees
Pests for which it is mentioned in Pest Notes
Currently, calcium polysulfide appears to not be referenced within any UC Pest Note.
Lime sulfur is primarily used for a dormant or delayed dormant treatment. It can cause injury to trees if applied after budbreak in spring or before mid October to early November in fall. Don't apply with oil before November 15. Follow all label directions for effectiveness and safety.
Precautions and Safety Equipment
Minimize your exposure to pesticides. Avoid
contact with eyes. Wear eye protection, long pants, a
long-sleeved shirt, and a hat that can be washed after each
use. Always read label of individual product for additional
Always check the label before purchasing or applying a pesticide
product for a specific pest on a specific plant to be sure it can
be applied. Follow label directions precisely.
WARNING ON THE USE OF CHEMICALS
Example home, garden or landscape use products6
No example products containing calcium polysulfide can be listed at this time.
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