"decrease attractiveness" is correct and usable in written English.
You can use it to describe a situation in which something or someone is becoming less attractive or appealing. For example, "The new regulations in the area have decreased the attractiveness of the neighborhood to potential buyers."
Field experiments showed that increasing the release rate by approximately five times marginally increased attractiveness but a four times reduction in the release rate significantly decreased attractiveness.
Secondly, decreased demand increases rates to other customers, which hurts a utility's credit rating, decreasing attractiveness to investors.
The decrease in rated health was associated with ratings of increased tiredness and decreased attractiveness.
In parallel, our hypothesis that florivory is linked to decreased attractiveness was not supported by our results.
The decreasing attractiveness of nursing as a career is of great concern, given that nurses play a central role in the government's primary health care approach.
Some interviewees believed that the proposal to transfer the ethics handling of all medical research to the five university RECs decreased attractiveness of research in smaller hospitals.
As these experiments revealed that cured asexual females were relatively unattractive to sexual males (see results), we evaluated if decreased attractiveness could stem from lineage divergence that is unrelated to the asexual mode of reproduction (that is, as could be observed between two sexual species).
Since this species is highly monandrous, decreased attractiveness of mated females may serve to prevent males from investing time and energy in courting unreceptive females, and may also limit female harassment, rather than being involved in preventing sperm competition (King & Bressac, 2010).
Several species of passion-flower (Passiflora) and cruciferous plants (Streptanthus) decrease their attractiveness to ovipositing female butterflies (thus reducing predation from butterfly larvae) by producing pigmented callosities that mimic the eggs of those insects.
Providing safe, pleasant, and efficient pedestrian and bicycle paths for children and seniors may decrease the attractiveness of owning cars.
