To lure pests of pistachio, almond and walnut, you can use pheromone traps. Pheromone traps are designed to attract specific pests by emitting synthetic versions of the pheromones that they produce. These pheromones act as chemical signals that attract pests to the trap, making it an effective tool for monitoring and controlling pest populations.

Here's a general guide on how to use pheromone traps to lure pests of pistachio, almond, and walnut:

1. Choose the appropriate pheromone trap: There are different pheromone traps available for specific pest species. For pistachio, almond, and walnut, you will need traps that are designed to attract the target pest species.

2. Set up the trap: Follow the instructions provided with the pheromone trap to set it up correctly. This may involve placing the trap at a specific height, in a shaded area, or in a location where the target pests are known to be present.

3. Monitor the trap: Regularly monitor the pheromone trap to check if any pests have been caught. The frequency of monitoring will depend on the specific pest species and the recommendations provided with the trap.

4. Replace the pheromone lure: The pheromone lure in the trap will eventually lose its effectiveness over time. Replace the lure according to the manufacturer's instructions to ensure that the trap continues to attract pests effectively.

5. Dispose of pests: Safely dispose of any pests that are caught in the trap according to local regulations and guidelines.

It's important to note that pheromone traps are just one component of an integrated pest management strategy. These traps can be effective for monitoring pest populations and reducing their numbers, but they should be used in conjunction with other pest management practices, such as cultural practices, biological control, and chemical control, to achieve effective pest control.