Bean grower Manuel Alvarado is part of the majority of producers in Mexico who consider it unnecessary to introduce genetically modified varieties of beans, as the government is promoting. “There is no study showing superior yields compared with hybrid or regional seeds. People are still unaware of what transgenic products are, nor the effects they have, but some of the things that are known about them are not good,” said Alvarado, the head of Enlaces al Campo, a bulk beans sales company in the city of Fresnillo, in the northern state of Zacatecas. "There can be no biosecurity with transgenics: they cause genetic erosion (loss of genetic diversity)." -- Silvia Ribeiro Genetically modified organisms (GMO) may cause a number of problems, among them the possibility that “transgenics will contaminate native and hybrid seeds, which have higher germination rates than transgenics,” Alvarado told IPS. Bean farmers in Mexico face a context of overproduction, low prices and increasing imports, in a country where there are 300,000 bean producers, half of them small scale farmers.