Population control of pest (such as Sesamia sp.) in a region with a pheromone method (mass trapping) increases the population of pests in adjacent areas. Is this the correct statement?
Pheromone-baited traps are basically used to detect the exotic invaders, to decide whether pest levels are sufficient to warrant intervention, and to time the application of conventional insecticides or other control measures.
Also, the Insect pheromones affect intraspecific interactions. Sex pheromones that in most cases attract males to virgin females have been the most extensively used in IPM. Mass trapping has been more pronounced, with aggregation pheromones as both male and female insects are trapped.
The sex pheromones as a control method has been more successful in bringing about mating disruption. This technique is based on the assumption that males will be disorientated if there is sufficient pheromone permeating in the air over and within a crop canopy, and consequently they will fail to mate. Just how the mating disruption works but efficacy likely involves the additive effects of habituation of responsiveness and offer some competition for the male's attention between the natural emitters, i.e. females, and the numerous sources of synthetic pheromone.
So, the statement inquired by you @ Amir Cheraghi, are likely to happen just in response of avoiding such situation by those competing specie especially for the male's attention between the natural emitters, i.e. females, and the numerous sources of synthetic pheromone.
Best Wishes
RT.
the effect of mass trapping is depending on the density of trap fixed in the attacked areas. The insect pest population in the whole areas must be monitored closely prior to mass trapping control action. This is to ensure that the population can be monitored before and after trapping session and to evaluate the effectiveness of the control action in that particular areas. See JOPR March 2017 issue.
I don't think there's evidence that using mass trapping increases the attack of pests on neighbouring fields. Some growers worry that the use of pheromones will attract pests to their fields when their neighbours don't use pheromone control, but as far as I know, there's no evidence of that either. Mass trapping is the most effective when it is used as part of an area wide control programme, but it does work even in a small scale.
You can check the following paper for more information: https://link.springer.com/article/10.1007/s10886-009-9737-y
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