Swiss environmentalists are planning a protest against Monsanto Co.'s $45 billion bid to take over Syngenta this Saturday in the Swiss city where Syngenta is based. About 30 groups that are opposed to genetically modified organisms are expecting about 400 demonstrators to come out for the event, which is slated to begin at 2 p.m., Bloomberg reports. The protest will be part of a "March against Monsanto" campaign, which includes planned protests in 52 countries, according to organizers. Yves Zenger,…