THE HAGUE, Netherlands—The Dutch government wants to impose a curfew as part of beefed-up restrictions to rein in the spread of a new more contagious virus variant that already accounts for at least one in 10 Dutch infections. Prime Minister Mark Rutte said Wednesday that his government also will ban flights from the UK, South Africa, and South America beginning Saturday for a month. With Rutte’s administration in caretaker mode since resigning last week, it will have to convince skeptical lawmakers to back the 8:30 p.m.-to-4:30 a.m. curfew before it can be enforced. A debate is expected Thursday and Rutte appealed for support, saying “we are at a crucial moment for our security, for our national public health.” Rutte’s four-party coalition resigned Friday over a scandal involving thousands of parents wrongly being labeled fraudsters by the country’s tax office. It remains in office until a new coalition is formed following a …