Chrysogen® for Control of Resistant Cabbage Loopers

An Effective and Economical Biological Insecticide without Harming Beneficial Insects

Chrysogen® is a biological insecticide that controls Chrysodeixis includens and Trichoplusia ni (Soy and Cabbage Looper) larvae which are resistant to chemical insecticides.

cabbage field

Chrysogen® is a Novel And Highly Selective Group 31 Mode of Action Insecticide for Resistant Soy and Cabbage Loopers Control

Download the Tech Sheet
Chrysodeixis includens and Trichoplusia ni Soy and Cabbage Loopers
(A.I.): Chrysodeixis includens nucleopolyhedrovirus (ChinNPV)
Suspension Concentrate (SC)
KEY CROPS with RATE of USE at 2.4floz/acre
  • Broccoli
  • Cabbage
  • Cauliflower
  • Kale
Diamondback Moth growth chart
Thorough crop coverage is essential, as the A.I. in Chrysogen® must be ingested by larvae to be effective. Chrysogen® is most effective when applied to small larvae at very early infestation levels.

Up to 3 days after application
Chrysogen® effectively  targets very small larvae (1st and 2nd instars). Infected small larvae feed very little, become increasingly lethargic, and are much more vulnerable to predation and environmental stress (i.e., dehydration).
4-6 days after application
At this stage, infected larvae are quite sick, stop feeding, and develop a dark brown color. Their skin bursts open, releasing billions of viral particles onto the environment. These viral particles are effectively dispersed by wind, rain, and predators and can infect other healthy larvae.

Do not use Chrysogen® as a curative treatment past the 3rd Instar (medium-small). In this situation, alternative control methods should be considered.
Chrysogen® is compatible as a tank mix partner with insecticides*, fungicides and fertilizers. Ensure tank mixture solution pH is <8 prior to adding Chrysogen® to the tank.
Spray solution pH above 8 may damage the virus and reduce performance of Chrysogen®. If needed, use a suitable buffer (acidifier).
Image of Heligen Gallon Container


Biological insecticide for the control of Trichoplusia ni larvae.

Insect Target
Chrysodeixis includens and Trichoplusia ni (Soy and Cabbage Looper)

Registered Crops
Cabbage, Kale, Cauliflower, Soybean and Broccoli.

1 Gallon

Technical Information

Scout early! Be proactive with Chrysogen® and get an economical lasting control.
Frequently Asked Questions
What is Chrysogen®?
Chrysogen® is a biological insecticide that controls Chrysodeixis includens and Trichoplusia ni (Soy and Cabbage Looper) larvae which are resistant to chemical insecticides.

What is the Active Ingredient in Chrysogen®?
A Natural occurring virus called Chrysodeixis includens nucleopolyhedrovirus (ChinNPV)

How Does Chrysogen® Work?
Chrysogen® is a suspension of virus particles called Occlusion Bodies (OB’s). When larvae ingest OB’s by eating Chrysogen® sprayed crops, they become infected with the virus. Using the insect’s own metabolism, the virus replicates itself and invades almost every cell of the insect – causing them to rupture. This releases a virus-laden liquid, which spreads throughout the crop, providing ongoing control of susceptible caterpillars.

What Pests Does Chysogen® Control?
Soy and Cabbage Loopers.

Does Chrysogen® Work on Larvae Populations that have Developed Resistance to Synthetic Insecticides?
Yes. It is a valuable rotational mixing partner in controlling larvae resistant to synthetic insecticides. There are no known cases of resistance developing to NPV-based insecticides anywhere in the world.

Is Chrysogen® Harmful to Beneficials?
No, Chrysogen® is a species-specific biological insecticide used to control Cabbage Loopers and has no impact on beneficial species. Actually, beneficial species help transmit the virus throughout the ecosystem more quickly, which can result in better coverage and control.

What are the Approved Crops for Chrysogen®?
Crops include: Cabbage, Soybean, Kale and Broccoli.

What are Chrysogen's PHI or REI?
Chrysogen® does not have a pre-harvest interval (PHI). The re-entry interval (REI) is 4 hours.
How Much Does Chrysogen® Cost?
Depending on the rate, about $6/acre.

What Should I Expect after Application?
Generally, Chrysogen® will provide upwards of ...% control dependent upon environmental and weather conditions. Larvae may continue feeding for 1-3 days after becoming infected with NPV and will typically die within 3-9 days. Smaller larvae die faster, and warmer temperatures will increase the speed of kill. Expect slower results when temperatures are cooler (less than 65°F). NPV-infected larvae will not show obvious symptoms of disease until 1-2 days before death.

Is Chrysogen® Compatible with Other Insecticides?
When mixed with water, Chrysogen® is highly compatible with the majority of insecticides and fertilizers. Ensure that the mixture has a pH of 8 or less before adding Chrysogen® as alkalinity will damage the virus.

How Should Chrysogen® be Stored?
Ideally, Chrysogen® should be stored at temperatures below 34°F Do NOT leave in direct sunlight for longer than 2 hours or in spray tank for extended periods of time. Unused product can be stored in the original container for future use.

Does Chrysogen® Have Any Residual Activity?
The virus in Chrysogen® is degraded by ultraviolet light. As a result, the sprayed virus may only be viable for a few days in the crop. However, once the initial population dies, huge quantities of virus will be released. This replicated virus will last for many weeks and will control recurring populations. Applying the virus while larvae are most active (feeding) increases the likelihood of ingesting and ultimately higher levels of control.