Inhibitor
An invented technology which takes many forms, inhibitors are chemical products intended to stop the metamorphosis of dolshkas. Most inhibitors are made to work on a specific species, but broad-spectrum inhibitors also exist.
Inhibitors can be made as powders, pellets, liquids, and even gasses, and target the hormonal balance that controls the metamorphosis of a dolshka. Because of this, species-specific inhibitors tend to work best.
Utility
Inhibitors have a very specific function: they prevent the metamorphosis of dolshkas. Why this is a desired effect varies. Some dolshkas are kept as livestock, in which case metamorphosis might prevent them from producing the desired product(s), or they might be easier to keep pre-metamorphosis, or it might even function just to prevent unwanted breeding (by keeping them in their immature forms).
Other dolshkas form agricultural pests, destroying crops or feeding on harvested materials. In these cases, inhibitors act as a long-term solution to completely exterminate a nest. Although it won't kill any individuals, it will prevent them from maturing into their vertebrate forms. Most species are incapable of reproduction if they don't metamorphose, so sooner or later, they will run out of breeding adults. Without the ability to create new generations, eventually the nest will die out.
Most people use species-specific inhibitors, but broad-spectrum inhibitors do exist and are used. In pest-control, these often have unexpected side-effects. Dolshkas are a wide-spread clade with countless species, and many tend to take their existence and their roles in the ecosystem for granted. By using a broad-spectrum inhibitor to wipe out a pest species, one can destroy pollinators and other pest-controling species without realizing, with potentially devastating effects.
Access & Availability
Dependent on type and place, but most agricultural communities have easy access to at least one type of inhibitor.
Complexity
Complex; requires specific chemical work to produce, and in-depth research to develop new types
Comments