# Plant volatiles are multi-species CCVs

**URL:** <http://discourse.iapct.org/t/plant-volatiles-are-multi-species-ccvs/16082>\
**Category:** Collective Control\
**Created:** [October 6, 2023, 12:53pm UTC](http://discourse.iapct.org/t/plant-volatiles-are-multi-species-ccvs/16082 "2023-10-06T12:53:16Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![rsmarken](http://discourse.iapct.org/user_avatar/discourse.iapct.org/rsmarken/32/3553_2.png) [@rsmarken](http://discourse.iapct.org/u/rsmarken)\
**Post date:** [October 6, 2023, 7:24pm UTC](http://discourse.iapct.org/t/plant-volatiles-are-multi-species-ccvs/16082/2 "2023-10-06T19:24:06Z")

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> [@Modeling hierarchical control](http://discourse.iapct.org/t/modeling-hierarchical-control/16069/35):
>
> Collective control is a process by which diverse effects resolve to a single result, whether the participating autonomous control systems are cells or humans or any of a variety of other creatures. Such is the scope of PCT.

There are many processes, where “…diverse effects resolve to a single result”, that don’t involve control. One of them is the process by which the cell body of a neuron resolves the diverse pulse trains entering it via dendrites into the single pulse train leaving it via the axon. I think we need a better definition of collective control. Doesn’t collective control have something to do with virtual controlled variables?

> [@Modeling hierarchical control](http://discourse.iapct.org/t/modeling-hierarchical-control/16069/35):
>
> Here is a very interesting investigation of variables collectively controlled by diverse species.
> 
> Yoneya, K. and Miki, T. (2015), Co-evolution of foraging behaviour in herbivores and their natural enemies predicts multifunctionality of herbivore-induced plant volatiles. Funct Ecol, 29: 451-461. [https://doi.org/10.1111/1365-2435.12398](https://doi.org/10.1111/1365-2435.12398)

I just read the abstract and it sounds very interesting. But it would help me understand why you think collective control is involved in this co-evolutionary process if you would describe what you think are the collectively controlled variables and explain why you think they are controlled, let alone collectively controlled.

Such is the skeptical attitude of PCT.

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