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  • Liquid suspension concentrate bioinsecticide 
  • Compatible with most agricultural chemicals 
  • Nontoxic to mammals or birds 
  • Zero-day pre-harvest interval 

Pests Controlled

  • Heliothis spp.
  • Corn earworm
  • Cotton bollworm
  • Tomato fruitworm
  • Tobacco budworm

Crops Protected

  • Alfalfa
  • Asparagus
  • Beans
  • Beets
  • Broccoli
  • Cabbage
  • Cauliflower
  • Corn
  • Cotton
  • Onion
  • Peanuts
  • Peas
  • Peppers
  • Potatoes


Active Ingredient: Polyhedral occlusion bodies (Obs) of the nuclear polyhedrosis virus ofHelicoverpa zea

Rates: 4-10 oz. per acre (see label)

Spray Interval: 2-14 days (see label)

Re-entry Interval: 4 hours

Days to Harvest: 0

Gemstar LC contains a naturally occurring virus that infects and kills larvae of the Helicoverpa or Heliothis spp. This virus is very host specific. It does not infect beneficial insects, fish, wildlife, livestock, or humans.

Gemstar LC must be eaten by the larvae to be effective so complete spray coverage is very important. Since Gemstar LC is most effective against small, newly hatched larvae, an early scouting program to determine early infestations is recommended.

Gemstar LC listed by both the Organic Materials Review Institute (OMRI) and the National Organic Program (NOP) for use in organic orchards.

Store at temperatures below 90° F. Activity may be impaired by storage above 90° F.

Storing this in a freezer or refrigerator will extend its shelf life.