Kits contain everything you need for three months of monitoring at one site. The economical plastic mesh Heliothis trap lasts 2 - 4 seasons. Place at least two traps per field, on a 6' fence post in your crop shortly after emergence or according to local recommendations. The Trécé pheromones are applied to rubber septas for even release over a 3 to 4 week duration for better capture rates. Kit includes one trap and three lures. USA made.