The phrase "a ruinous effect on" is correct and usable in written English.
It can be used to describe a negative or destructive impact that something has on a person, situation, or environment.
Example: "The economic downturn had a ruinous effect on small businesses in the area, leading to many closures."
Alternatives: "a devastating impact on" or "a harmful influence on".
The danger that President Bush might take too rigid an approach, with a ruinous effect on his other foreign-policy goals, is particularly acute in the Middle East (see article).And there is another task.
Energy (and environment) was a winning issue for Obama and Obama's election has had a ruinous effect on economic freedom across the board.
However, the expense of building the road from the beach (no financial assistance being provided by Trinity House, despite their regular use of the road following the construction of the lighthouses), the Villa and the general cost of running the island had a ruinous effect on the family's finances, which had been damaged by reduced profits from their sugar plantations in Jamaica.
The departure in January of the executive chairman, Nicola Cortese, seemed to have a ruinous effect.
But his determination to squeeze out the competition has had a ruinous effect in an unlikely place – his home town.
Willingly copping to the ego-stroking limelight of the case despite its ruinous effect on his personal life, Mr. Kennedy lights up his scenes with an openness and empathy that only underscore his prisoner's twisted introversion.
World War I's ruinous effect on baseball's economy had cut the players' pay in half, the 1919 season had been unofficially canceled, and most players expected to be drafted when the Series ended.
Rural Democrats strongly opposed that approach because of the potentially ruinous effect on doctors and hospitals in their districts, where Medicare rates are generally well below the national average.
The Digital Media industry seems to be waking up to clutter's ruinous effect on advertising value.
A report on sugar's ruinous effects on people's health that was controversially delayed by Jeremy Hunt urges ministers to impose a "sugar tax" and crack down on the marketing of unhealthy products to children and two-for-one deals in supermarkets in a bid to tackle childhood obesity.
Make no mistake, the excessive consumption of sugary soft drinks has ruinous effects on people's health, and government and policy must play a central role in tackling the obesity crisis.
