Douglas Harper's Etymology Dictionary
1819, from Negro + -phobia.
Wikipedia
Negrophobia is a fear of negro peoples worldwide. It can be influenced by various things such as traumatic events or circumstances.
Usage examples of "negrophobia".
The theory advanced by those who claim themselves to be immunes from that dreaded disease of Negrophobia is, that the industrial education of the Negro will inevitably inspire a similar movement for the industrial training of the poor whites, and the resultant competition means a further complication of the race problem, which will only be solved by the ultimate separation of the races.
Unlike its predecessor of the 1870s in the South, this short-lived but widespread movement was based chiefly in the Midwest and was devoted above all to anti-immigrant, anti-Semitic, anti-Catholic and antimodernist sentiment, with Negrophobia present but of lesser importance.