Economic threshold for monitoring of Heliothis-armigera by pheromone trap in the gram field is

The economic threshold for monitoring Heliothis-armigera by pheromone trap in the gram field is 4 - 6 adults/trap/night.
A pheromone trap is a type of insect trap that uses pheromones to lure insects. Pheromone traps are used both to count insect populations by sampling and to trap pests such as clothes moths to destroy them.
Helicoverpa armigera is known as the cotton bollworm, corn earworm, Old World (African) bollworm, or scarce bordered straw. The larvae feed on a wide range of plants, including many important cultivated crops. It is a major pest in cotton and one of the most polyphagous and cosmopolitan pest species.