In this document the possible sustainable and respectful strategies for the control of the processionary are detailed, depending on the state of the biological cycle in which the pest is, and at what time of the year we are:
The G trap : it is the one that has historically been used, if you have this trap from other campaigns it is recommended to use this one, since it is a very resistant trap, and only by changing the bag, it is again operational.
In the tests carried out, it has been appreciated that the differences that occur in the number of catches are not statistically significant, which justifies being able to use both models of traps interchangeably.
With these, it is not possible to make a massive capture for use, since the pheromone is not registered as such, so what we usually do are, apart from monitoring, and captures in specific areas (parks, gardens, etc.), barriers that they stop the penetration of the pest in the areas that we want to protect.
It is a strategy that is based on the introduction by means of injections through a specially designed team, of phytosanitary product that once in the vascular system of the tree, is redistributed by all the cells of the plant by translocation of the sap . In this way, regardless of the size of the tree (there is a limitation when the trees are very small, since in order to inject the product a hole must be made in the trunk by means of a drill), it is fully protected, once they have been a month or so after the application, since at the moment it is considered that the product is already distributed in all parts of the sample.
In the case of processionary endotherapy, what happens is that the first-stage larvae feed on the needles, which already accumulate the plant protection product and die (we remember that the larvae in their first stages still do not have stinging hairs) . The importance of making the application in due time is paramount, since the effectiveness of the product is proportional to the state of development of the tracks, the larger they are, the more resistant they are to the product.
They are rings that are placed around the trunk of the pine in which there are pockets or suspicions that there are processionary caterpillars, which what they do is prevent the caterpillars with stinging hairs, once they have finished their cycle, descend from the pine to be buried by the characteristic processions. It is avoided by putting a belt around the pine with a single opening that leads to a bag that is recommended to be filled with peat or soil, in such a way that they think they have reached the ground, and are buried and pupa to continue their cycle in the that some adults will emerge the following season, and others up to three years later when they go into diapause according to conditions.
There are different sizes of rings depending on the diameter / perimeter of the trunk.
Once the loss of descent of the procession is finished, it is necessary to manipulate the bag where these larvae “have been stored” with gloves, mask and glasses, and eliminate this by burning or burying it. And the following campaign, it is only necessary to replace the bag.
I include a series of photos with the typical sequence:
Ignacio Torrente Sevillano
Technical engineer Forestry / Ingeniero Técnico Forestal / Forestry Technical Engineer
For more information and inqueries: Mp. +34 658 828 024